- Piezometers (10)
- Inclinometers and Tiltmeters (33)
- RDS Railway Deformation System (8)
- Pendulums (2)
- Settlement Gauges (14)
- Pressure cells (7)
- Load Cells (6)
- Extensometers (6)
- Crackmeters and Jointmeters (3)
- Strain Gauges and Thermometers (4)
- Readout units and dataloggers (60)
- Cables, Accessories and Software (3)
FAQ
FAQ#121 - Why can't I connect the WR-log node to my mobile phone/tablet?
Make sure ALL the following steps are verified:
- Check that your mobile phone/tablet is equipped with a USB OTG (On The Go) port
- Check that the Operating System version of the mobile phone/tablet is Android 9 or higher (the WR-Log system does not have an app for Apple iOS systems)
- Check that the batteries in the mobile phone/tablet are charged
- Check that the batteries inside the node are not discharged, that they are inserted with the correct polarity and have the correct voltage and size (Sisgeo recommend the SAFT LSH14 3.6V model, do not use the "light" model)
- Ensure that you always have the latest version of the WR-Log app installed (check the Sisgeo website at https://www.sisgeo.com/downloads-en/software/category/software-completi.html )
- Check in the Operating System settings that the WR-Log app has all permissions (storage, geolocation)
- Check that your mobile phone/tablet is connected to the internet for any node updates
- Check that your USB cable for the connection between the node and mobile phone has OTG technology
- Check that you have correctly and fully inserted the USB connectors in both the mobile phone and the node
- Check that the node's internal switch "SW A" that manages the power supply is set to "BATT".
- For digital nodes only: check that the switch inside node "SW B" is set to "HALF".
Sisgeo successfully uses the mobile phone model "BLACKVIEW BV4900 PRO" for all its tests with WR-Log system
FAQ#120 - Why can't I connect the MIND readout to my mobile phone/tablet?
Make sure that ALL the following steps are checked:
1. The batteries of the mobile phone/tablet and the MIND readout are charged
2. You have installed the latest version of the MIND APP (check the Google Play Store)
3. The version of the mobile phone/tablet's operating system is Android 10 or higher
4. The Bluetooth version of the mobile phone/tablet is 4.2 or higher
5. Only for Android mobile phones/tablets:
• in the Android settings, the BRAIN APP has all the permissions (storage, geolocation)
• if the system keyboard does not allow the correct decimal separator to be entered, install the "Gboard" app which allows the standard Google keyboard to be used.
FAQ#119 - Why can't I connect the BRAIN reel to my mobile phone/tablet? Have I connected correctly my BRAIN measuring system?
Make sure that ALL the following steps are checked:
1. The batteries of the mobile phone/tablet and the BRAIN system are charged
2. You have installed the latest version of the BRAIN APP (check the Google Play Store or Apple Store)
3. The version of the mobile phone/tablet's operating system is Android 7 or higher, or iOS 11 or higher
4. The Bluetooth version of the mobile phone/tablet is 4.2 or higher
5. Only for Android mobile phones/tablets:
• in the Android settings, the BRAIN APP has all the permissions (storage, geolocation)
• as first thing, pair the mobile phone/tablet to the BRAIN, from the Android settings, as described in the BRAIN user manual
• if the system keyboard does not allow the correct decimal separator to be entered, install the "Gboard" app which allows the standard Google keyboard to be used
6. The measuring probe is correctly connected to the BRAIN reel connector, as described in the user manual
7. Once the measuring probe (inclinometer, spiral meter or T-REX) has been connected, start a measurement or checking the system with the appropriate button of the app: the led on the BRAIN reel must never be red. A red LED means that the BRAIN reel does not see the measuring probe connected correctly.
FAQ#118 - Is it possible to use the reference reading (zero reading) taken with a digital inclinometer probe as a reference reading for another digital inclinometer probe?
No, this is not possible.
Sisgeo calibrates each probe individually, but each probe has its own small different properties, that have a certain influence on the readings.
The international standard ISO 18674-3, describing the reference reading, states that:
"It is good practice to take an additional reference measurement with an independent probe that can be used as a backup".
The direction suggested by the standard is therefore clear: if you change the measurement probe, you must take a new reference measurement with the new probe.
However, with the KLION inclinometer data management software, Sisgeo offers a possibility to compare data from different probes. The method proposed by KLION can be applied by accepting 3 strong assumptions (see also the KLION software user manual at the following link, starting on page 43: https://www.sisgeo.com/uploads/manuali/KLION_SOFTWARE_EN_03_2022.pdf):
1 - there was no movement between the first measurement with the new probe and the last reading with the old probe, so they can be considered to be coincident.
2 - the international standard ISO 18674-3 considers measurements taken with different probes to be non-comparable.
3 - international publications suggest not using this approach: the correct procedure when starting measurements on an existing inclinometer tube with a new probe is to start a new data analysis and processing by acquiring a new reference measurement.
By accepting these assumptions, it will be possible to apply the 'new probe' function.
FAQ#117 - WHY CANT I CONNECT MY ANDROID DEVICE TO B.R.A.IN INCLINOMETER SYSTEM?
Preliminary verifications:
• B.R.A.IN reel’s battery is charged
• Your mobile or tablet has the following minimum features:
Bluetooth Low Energy BLE 4.2 or higher
Android OS 7 or higher
If the preliminary verification is positive, please proceed as follows:
• Un-install the B.R.A.IN app from your device (if you have already installed it)
• Un-pair the B.R.A.IN from your device (if you have already paired it)
• Restart your device
• Switch on your B.R.A.IN reel
• Go into Android settings --> Bluetooth. Search for the available Bluetooth devices. You should find your B.R.A.IN named with its serial number, select it.
• If the system requires to insert the Bluetooth PIN: insert the code 123456 and then OK.
• Give the permissions to the B.R.A.IN APP for “Location” and “Storage”: go to “Android Settings” --> “App & notifications” --> select the “B.R.A.IN” app --> “Permissions” --> Allow “LOCATION” and then also allow “STORAGE”
• Restart the device
• Switch off you B.R.A.IN reel (if the B.R.A.IN led doesn’t change from blue, keep pressed the switch-on button for more than 3 seconds until the led becomes flashing green, now press again the button in order to switch off the B.R.A.IN).
• Download and install the B.R.A.IN app from your device store (e.g. Google Play)
• Open the B.R.A.IN app on your device
• Switch on the B.R.A.IN reel
• Select "system" in the B.R.A.IN app. You should find the switched-on B.R.A.IN reel with its serial number.
• Tap on the find B.R.A.IN and wait for connection.
• Within 15-20 second you should see the "system info" page, something similar to the following image:
FAQ#116 - How do I configure a WR-Log digital node to read RS485 Sisgeo TIMED sensors?
Sisgeo digital instruments can operate in two powering modes: TIMED or ALWAYS-ON (for more information see F.A.Q.#094 here https://www.sisgeo.com/products/faq/item/which-are-the-available-powering-mode-for-sisgeo-digital-sensors.html ).
A string of mixed instruments consisting of TIMED gauges and ALWAYS-ON gauges cannot work.
The first thing to do is therefore to check that ALL connected instruments in your array are set to TIMED mode.
You can check the powering mode of your gauges in the calibration reports of each instrument as in the example below.
The numbers "3-3" after "TIMED" are the "warming delay" and "address delay" values to be entered in the APP wizard set-up page.
In order to correctly set-up the WR-Log app for reading a string of Sisgeo digital gauges in TIMED powering mode, please follow the next screenshot as example:
- choose the protocol "Sisgeo v3"
- insert the correspondent Warming delay value (in our example 3)
- insert the correspondent Adress delay value (in our example 3)
- insert the addresses of the gauges in your string, separated by comma without any space, in ASCENDING order (do NOT inser the addresses in random order!)
NOTE: in TIMED mode, the reading time is about WARMING_DELAY x HIGHER_RS485_ADDRESS, in our case 3 x 20 = about 60 seconds.
So, if your string is composed by 20 gauges BUT with addresses from 200 to 220, the reading time is about 3 x 220 = 660 seconts (11 minutes) to read the same 20 gauges. So that, is really important to correctly set-up the addresses of the gauges of the string to be read.
FAQ#115 - What is the best power supply for the OMNIAlog logger used to manage the FLX-Rail system?
The OMNIAlog logger for FLX-Rail has a fairly high power consumption due to the router.
If OMNIAlog is set to send data through the router after each acquisition (so every 5 minutes) it needs to be powered from the network (e.g. 220Vac)
If OMNIAlog is set to send data through the router once a day, it can be powered by solar or grid power.
FAQ#113 - Why I’m not able to connect my mobile/tablet to MIND readout?
Verify that the mobile phone/tablet used does have the minimum required features:
Bluetooth Low Energy BLE 4.2
APPLE iOS 14 or higher
Android OS 9 (suggested Android OS 10 or higher)
Then please check that the mobile phone/tablet has Bluetooth on and that the MIND unit has a sufficiently charged battery.
FAQ#112 - Which are the main troubleshooting that I have to know for MIND readout?
The up-date troubleshootings are available within MIND readout User Manual (see relevant DOWNLOD area or product page).
The main troubleshootings are:
FAQ#111 - Why I cannot read correctly my 4-20mA current loop gauge?
It could be a problem connected to the power supply given by the readout or logger. When the power supply is in the current loop (2-wire gauge) it is necessary to consider the effect of voltage drop across the shunt resistor on the voltage applied to the gauge.
For example, suppose a 4-20mA gauge requires at least 12 V to operate correctly and the readout powered with 16 V. The voltage the gauge sees is the voltage supplied by the readout minus the voltage drop in the rest of the current loop. At 20 mA output, the voltage drop across the commonly used 100 ohm resistor is 2 V.
When the voltage supplied by the readout is 16 V, this leaves 14 V for the gauge and everything is fine.
However, if the readout is powered with less than 14 V, at 20 mA current it will leave less than 12 V for the gauge. In this case, the output of the transmitter may be in error.
FAQ#110 - What's the purpose of the linear and polynomial factors written in the Calibration Reports?
Utilize the Linear Sensitivity Factors (A, B) and Ploynomial Sensitivity Factors (A, B, C, D) of the Calibration Reports permit to obtain readings in engineerig units with a maximum error as for the Calibration Report.
In the case of analogue gauges, the factors shall be applied on the electrical readings (i.e. mA, mV, digit, etc...)
In the case of digital gauges in "Legacy mode" (digital gauges with FW version 0.X, 1.X, 2.X or 3.X), the factors shall be applied on the output in engineering units (i.e. sin angle, kPa, etc...)
In the case of digital gauges in "Normal Mode" (digital gauges with FW version 3 or higher), the factors are already applied inside the gauge, so the Sensitivity Factors shall not be utilized with these instruments.
NOTE: all the new digital gauges are in "Normal mode".
For more information regarding SISGEO Calibration Report, refer to the following video https://youtu.be/BF8e3ZRcaYU
For more information on "how to use" the Sensitivity Factors with analogue gauges and with digital gauges in Legacy Mode, refer to the instruments manuals or to the following document: https://www.sisgeo.com/uploads/manuali/Addendum_data_processing/ADDENDUM_-_DATA_PROCESSING_-_EN_00.pdf
FAQ#109 - Which are the limitations in terms of instruments that can be connected to WR-LOG Digital Nodes?
The limitations in terms of instruments to be connected on WR-LOG digital nodes are the following:
- - it is not possible to connect on the same node digital gauges of different model (i.e. digital H-Levels and digital IPIs)
- - the gauges connected on the same node shall have the same engineering unit output (i.e. degrees)
- - the gauges connected on the same node shall have the same powering mode (i.e. ALWAYS-ON)
- - if the instruments connected to the same node have an output with a multiplication factor (i.e. 20000 sin angle where 20000 is the multiplication factor), all the instruments shall have the same multiplication factor.
FAQ#108 - Compatible 4G and 3G bands for OMNIAlog routers model 0OMXRO4G0EU, 0OMXRO4G0NA and 0OMXRO4G0AP
ROUTER MODEL 0OMXRO4G0EU "EUROPE":
4G BANDS: B1, B3, B7, B8, B20
3G BANDS: B1, B8
Automatic fallback to 3G
ROUTER MODEL 0OMXRO4G0NA "NORTH AMERICA":
4G BANDS: B2, B4, B5, B12/B13
3G BANDS: B2, B5
Automatic fallback to 3G
ROUTER MODEL 0OMXRO4G0AP "APAC":
4G BANDS: B1, B3, B5, B7, B8, B18, B19, B21, B28, B38,B39, B40,B41
3G BANDS: B1, B5, B6, B8, B9, B19,B39
Automatic fallback to 3G
FAQ#107 - Which are the WWAN capabilities of the 4G gateways?
| Technologies | Band | Data rate |
|
LTE
|
Band 1 (2100)Band 1 (2100)
|
LTE FDD:
|
|
WCDMA
|
Band 1 (2100)Band 1 (2100)
|
DC-HSDPA:
|
|
GSM
|
B2 (1900 PCS)B2 (1900 PCS)
|
EDGE: - Max 296Mbps (DL) - Max 236.8Mbps (UL) GPRS: - Max 107Mbps (DL) - Max 85.6Mbps (UL) |
FAQ#106 - I want to use a KLION software demo license, how should I proceed?
Send an email to assistance@sisgeo.com and you will receive a temporary license to access the program.
FAQ#105 - I am from a non-EU country, how should I proceed?
To send equipment from a non-EU country it is necessary to include in the shipping documents a proforma invoice showing a value xxx € for each instrument.
Then, this proforma must be sent in copy to customer care, in the event that the Customs requires it.
Important: without the proforma invoice the instrument cannot be imported.
FAQ#104 - In which case should I open a new ticket request?
The ticket request has been introduced in order to give a rapid and effective response to requests of a technical nature, regarding problems with the instrumentation or doubts about the installation of the instruments.
Through simple menus, you are guided to the completion of the form so that all the information necessary to solve the problem are immediately passed to the assistance service.
FAQ#103 - How should I proceed to ask for the instrument Rental service?
Please proceed to request the instrument Rental service through our new portal at the following link https://support.sisgeo.com/hc/en-us and then follow these steps:
• click on SUPPORT
• click on LOGIN, if you already have an account insert your credentials and click SIGN IN, otherwise click on SIGN UP and follow the indications
• once logged click on RENTAL SERVICE and proceed to fill in the form
• click on SEND
After submitting the form, you will be contacted by the customer care.
FAQ#102 - How should I proceed to ask for technical assistance on site?
Please proceed to request a technical assistance on site through our new portal at the following link https://support.sisgeo.com/hc/en-us and then follow these steps:
• click on SUPPORT
• click on LOGIN, if you already have an account insert your credentials and click SIGN IN, otherwise click on SIGN UP and follow the indications
• once logged click on REQUEST FOR TECHNICAL ASSISTANCE ON SITE and proceed to fill in the form
• click on SEND
After submitting the form, you will be contacted by the customer care.
FAQ#101 - How should I proceed to open a Training request?
Please proceed to request a Training through our new portal at the following link https://support.sisgeo.com/hc/en-us and then follow these steps:
• click on SUPPORT
• click on LOGIN, if you already have an account insert your credentials and click SIGN IN, otherwise click on SIGN UP and follow the indications
• once logged click on REQUEST A TRAINING and proceed to fill in the form
• click on SEND
After submitting the form, you will be contacted by the customer care.
FAQ#100 - How should I proceed to receive a Compliance Certificate copy?
Please proceed to request the Compliance Certificate copy through our new portal at the following link: https://support.sisgeo.com/hc/en-us and then follow these steps:
• click on SUPPORT
• click on LOGIN, if you already have an account insert your credentials and click SIGN IN, otherwise click on SIGN UP and follow the indications
• once logged click on ASK A COMPLIANCE CERTIFICATE COPY and proceed to fill in the form
• click on SEND
At the end of these steps, you will receive an email with the requested documents.
FAQ#99 - How should I proceed to receive a Calibration Report copy?
Please proceed to request the Calibration Report copy through our new portal at the following link https://support.sisgeo.com/hc/en-us and then follow these steps:
• click on SUPPORT
• click on LOGIN, if you already have an account insert your credentials and click SIGN IN, otherwise click on SIGN UP and follow the indications
• once logged click on ASK A CALIBRATION REPORT COPY and proceed to fill in the form
• click on SEND
At the end of these steps, you will receive an email with the requested documents.
FAQ#98 - How should I proceed to send goods for repairing? How to request an RMA?
The returned instruments shall be authorized in advance and shall have an RMA code.
Please proceed to request the RMA through our new portal at the following link https://support.sisgeo.com/hc/en-us and then follow these steps:
• click on SUPPORT
• click on LOGIN, if you already have an account insert your credentials and click SIGN IN, otherwise click on SIGN UP and follow the indications
• once logged click on REQUEST A NEW RMA and proceed to fill in the form
• click on SEND
At the end of these steps, you will receive an approval email with further shipment instructions.
Please consider that every instrument/device without an RMA code will be rejected.
FAQ#097 – Which is the Bluetooth PIN for connecting B.R.A.IN to the iOS/Android device?
The PIN code is the same for all the B.R.A.IN and is 123456.
Please follow the instruction in the user manual for the first connection of B.R.A.IN to the device.
FAQ#096 - How many SISGEO digital sensors could be read with WR-LOG digital node?
If the digital gauges are settled in ALWAYS ON, the WR-LOG digital node will be able to read up to 15 gauges.
If the powering mode is settled in TIMED, the WR-LOG digital node will be able to read up to 30 gauges.
FAQ#095 - How long does a chain of digital sensors take to be read?
It mainly depends from the powering mode of the gauges (refer to FAQ#094 for the description of the powering modes).
AN EXAMPLE WILL BETTER CLARIFY THE ANSWER.
In a batch of 240 gauges, unless otherwise requested by the Customer, the addresses are settled from #001 up to #240. In a borehole is installed a chain of 30 digital IPI with addresses from #210 to #240 that are read with a dedicated logger or wireless node.
- IF the powering mode is ALWAYS ON, the system will take 30 seconds to read the whole chain (about 1 second for each gauge)
- IF the powering mode is TIMED, the system will take 723 seconds to read the whole chain, because the TIMED mode call one by one ALL the addresses (3 seconds of warm-up +[3 seconds x higher address]). So that the reading time strongly depends from the address number.
Consequently, is really important to define the LAYOUT OF THE SYSTEM: number of digital chains, the number of gauges for each chain, and how many or which logger will be utilized to read the gauges.
In the batch of 240 gauges, if they will be installed in 8 chains of 30 sensors each, and if each chain is read with a dedicated logger or digital wireless node, the best solution is to inform SISGEO about the layout of installation and SISGEO will set-up ALL the chains of digital gauges with addresses from #001 to #030.
In this case, in TIMED mode the chain will be read in 93 seconds.
FAQ#094 - Which are the available powering modes for SISGEO digital sensors?
All SISGEO digital gauges can be settled in two different powering mode:
- ALWAYS ON: all digital sensors switched on together. Faster solution, but high power consumption. The system will take about 1 second to read each gauge.
- TIMED: the sensors are powered and switched-on one by one. Reading of the chain take more time than "always on", but the power consumption is lower. In this case the system will take about 3 seconds to read each gauge.
The STANDARD powering mode is ALWAYS ON, so unless otherwise requested by the Customer, the sensors are settled as default in ALWAYS ON.
FAQ#093 - B.R.A.IN App Devices Compatibility
B.R.A.IN App is compatible with Android OS (from ver.7) and Apple iOS (from ver.11).
Moreover the device have to be compatible with Bluetooth Low Energy (BLE) v.4.2.
At this link you can find all the smartphone and tablet tested by SISGEO.
NOTE: the list of devices is updating time by time.
FAQ#092 – If I us a WR-LOG wireless system, when data will be available on the Gateway (SLOT TIME) and on my FTP?
WR-LOG system can send three type of data:
- Nodes data file
- Nodes health file
- Compacted or Custom Compacted file
In order to optimize the availability time, the Sampling Rate (SR) of each node must be inserted into the Gateway, so that Sisgeo STRONGLY SUGGEST to insert the sampling rates of each node into the Gateway.
If the sampling rate is not set from the gateway, the system will use a default SLOT TIME of 1 hour for Nodes data files and Compacted or Custom Compacted files.
SAMPLING RATES INSERTED INTO GATEWAY
Calculation of the SLOT TIME (data available on the Gateway)
NODES DATA FILE: (Number of nodes x 7.5 sec)
NODES HEALTH FILE: (Number of nodes x 7.5 sec) – sent to Gateway every 7 hours
COMPACTED/CUSTOM FILE: [(Number of nodes x 7.5 sec) x 1.8 ] + 600 sec
Calculation of data transmission from GATEWAY to FTP (data available on the FTP)
NODES DATA FILE: 3 minutes
NODES HEALTH FILE: 3 minutes
COMPACTED/CUSTOM FILE: 18 minutes
SAMPLING RATE SET FROM THE GATEWAY (default)
As default, the SLOT TIME is 1 hour
FAQ#091 - How can I read data from 0MEPR106000 barometer in engineering units?
The Barometer model 0MEPR106000 have a 4-20mA current loop output.
The measuring range is from 800 mbar (equivalent to 4 mA) to 1200 mbar (equivalent to 20 mA).
Manual readings are taken connecting the wires to a readout according to the following instructions:
Signal: 4-20mA current loop
Red: + Loop
Black: - Loop
The following formula allows to convert the electrical measurements (mA) into engineering values (mbar):
𝑃𝑚𝑏𝑎𝑟= (𝑅𝑚𝐴*𝑆)+700
Where:
Pmbar = Pressure in millibar
RmA = Reading in mA
S = sensitivity as from the Compliance Certificate in mA/mbar (usually 25 mbar/mA)
FAQ#090 - Are the old 16/32 ch multiplexers compatible with OMNIAlog?
The OLD multiplexers 16/32 channels are compatible with OMNIAlog model GT-816.
Starting from the OMNIAlog firmware version 25.56.00, old mux 16/32ch continue to be compatible but all the new features available with 24ch multiplexers will be not available.
With OMNIAlog model GT-2400 the OLD multiplexers 16/32 ch are NOT compatible and do not work.
FAQ#089 - Which is Gateway model to choose for WR LOG wireless system?
The available gateways for WR LOG system are:
- 0LSWR868GW0
- 0LSWR915GW0
- 0LSWR923GW0
These models differ from the frequency utilized by the internal 2G/3G modem.
In order to choose for the right gateway, please refer to the document to be downloaded by clicking on the "Document" icon.
If more than one model is suggested for the installation Country, you have to contact your Provider of mobile services in order to request which frequency it utilize.
FAQ#088 - Which is the IP protection class of Sisgeo junction boxes?
Sisgeo junction boxes have IP67 protection.
The IP class is granted if the cable glands are correctly tight and the cover is mounted respecting the right key position, as for the following pictures:
FAQ#087 - Could the IPI, BH Profile and DEX probes have problems in frozen water?
Sisgeo suggest that frozen water within the inclinometer casings is to be avoided due to following reasons:
- Ice within the casing will affect functionality of the systems by blocking the individual probes;
- Mechanical damages can occur to the probes, but also to the inclinometer casing due to the expansion of frozen water
In any case, inclinometers and DEX probes can work until -30°C so that sensors will be not damaged.
What can be done to avoid this?
- insert a heating cable that keeps water temperature above 0°C;
- remove water from the inclinometer casing;
- place the inclinometer/DEX probes at locations where temperatures remain above 0°C.
FAQ#086 - How to solve the problem with dial-up connection under Windows in some languages version
When you create the dial-up remote connection to communicate with miniOMNIAlog, there could appear an error regarding the driver of the Standard Modem 56000bps used for the connection. This error appears only if you use certain versions of Windows in languages different from Italian and English.
This problem could appear both configuring manually the connection and using the software supplied from SISGEO “miniOMNIAlog Connection Tool”. This software automatically configures the connection. Otherwise, the user should configure the connection manually.
If you start the connection, there could appear an error regarding the Standard Modem 56000bps and the connection could fail.
To solve this problem, SISGEO has a special version of miniOMNIAlog Connection Tool which allows indicating which drivers for modem 56000bps can be used. Therefore, you could avoid using the drivers on the Windows version installed on the PC. In addition to the Tool, SISGEO supplies a folder containing the working drivers. These drivers originate from an English Windows version and therefore are genuine and safe.
When you are trying to connect to miniOMNIALog, and an error about drivers appears or the connection fails, it is necessary to ask to SISGEO for the special tool by opening a support ticket:
After receiving the new tool, it is necessary to proceed as follow:
- Uninstall the previous version of miniOMNIAlog Connection Tool
- Remove any modem of dial-up connections created with the previous tool
- Extract on desktop the content of file .ZIP
- Install the new Tool
After having started the new Tool, you could see a new button which allows selecting the drivers in the folder of the ZIP file and so, not those on the operating system.
In so doing, a new connection which uses the working drivers creates.
FAQ#083 – How does the TRIGGER function of OMNIAlog digital input work?
The TRIGGER function of the two digital inputs available on OMNIAlog datalogger is typically used with seismic station. In case of an event (earthquake), the seismic station is usually able to supply a certain tension on its output (typically 5Vdc). If this output is connected to the digital input of OMNIAlog, and OMNIAlog is conveniently configured, the extemporaneous acquisitions of all the sensors connected to OMNIAlog will be done (the number of acquisitions is programmable on OMNIAlog web pages). This way, after an earthquake, it is possible to compare the readings of the instrumentation connected to the two dataloggers. Therefore, it is no necessary to wait for the planned acquisitions that could take place several hours after the earthquake.
In case the extemporaneous reading generated from the digital input overlies the planned reading, this one will be done at the end of the “extemporaneous acquisition”.
In case there are different “extemporaneous acquisitions” that overlie the planned acquisition, this one has the priority. Therefore, at the end of the first extemporaneous acquisition, the planned acquisition will be done. At the end of the planned acquisition, the remaining extemporaneous readings will be executed.
The extemporaneous acquisitions are read as “normal” acquisition from OMNIAlog. Therefore, the planned alarms are notified and the acquisition is saved in OMNIAlog memory.
In events log, the event linked to the extemporaneous acquisitions appears, in order to identify them.
FAQ#082 – Is there any precaution to adopt for the number of measurements saved on the OMNIAlog / miniOMNIAlog memory?
OMNIAlog is equipped with a microSD 2GB memory. This memory allows to save a very high number of readings. For this reason, it is necessary to bear in mind what follows:
- if there are numerous readings saved in datalogger memory, exportation time both with USB pen and through web pages can take long time. For example, to export with an USB pen about 5.000.000 data point with related events logs and alarms logs, OMNIAlog needs 4-5 hours.
- the traditional spreadsheets have some limits in number of lines and columns management. For example, Microsoft Excel and Open Office manage up to1.048.576 lines and 16.384 columns. Using the same example of the previous point, the measurement file (log measurements) extensively overtakes these limits. Therefore, opening the file, not all the measurements will be shown.
- if the exportation needs a time period that is superior to the configured acquisition time, the acquisitions that where planned are not done.
Therefore SISGEO strongly suggests to periodically download data and, later, to delete them from OMNIAlog memory. This way it is guaranteed an efficient data download.
FAQ#081 - Which is the maximum cable length for DEX and DEX-S probes?
The maximum instrument cable length from DEX probe to datalogger is 200 m. If the automatic data acquisition system includes distributed external multiplexer box, the maximum cable length is 200m from DEX probe to multiplexer box plus 200m from multiplexer box to OMNIAlog (in total 400m).
FAQ#080 - What dimensions has the .CSV file in columns that contains the measures acquired with OMNIAlog and miniOMNIAlog?
The dimensions of the measures file “in columns” downloaded with OMNIAlog and miniOMNIAlog vary according to the number of sensors acquired and the stored cycles of acquisition. The higher is the number of sensors acquired and the number of cycles of acquisition stored, bigger is the dimension of the file.
It could be used the following formula to have an estimate of file dimensions:
Dimension[byte]: [(4+n)*10]+[(4+n)*6]*m
Where:
n= number of acquired channels
m= number of acquisition cycles
The result is expressed in “byte”
This data could be used to evaluate the data consumption in case of a transmission by e-mail or on FTP server.
Ces données peuvent etre utilisées pour évaluer la consommation des données en cas de transmission par email ou sur serveur FTP.
FAQ#079 - Is it possible to send SMS in case of alarms with miniOMNIAlog?
Yes, if miniOMNIAlog is equipped with 2G (GSM/GPRS) modem.
To do so, the user must have already configured the relative web pages.
FAQ#078 - Is it possible to send SMS in case of alarms with OMNIAlog?
Yes, if OMNIAlog is equipped with a 2G (GSM/GPRS) modem, connected through a serial cable to its RS232 port.
OMNIAlog allows to set up alarm thresholds and the notification of these alarms could occur:
- by SMS;
- by email;
- by FTP;
- increasing the acquisition frequency;
- managing a digital output (for example to manage a siren)
In order to correctly use the first three notification modes, it is necessary to consider a suitable interface of communication:
- with a 2G modem on RS232 it is possible to send SMS, email and on FTP;
- with a HSPA router on LAN it is possible to send email and on FTP (but not SMS).
FAQ#077 - Which are the maximum cable lengths from instrument to datalogger?
The cable lengths depend from many factors, first of all installation and cable protections (screen, earth, etc...). Assuming that instruments are installed in a workmanlike, for the maximum cable lengths should be followed the next suggestions:
DIGITAL INSTRUMENTS: see FAQ#073
ANALOGUE INSTRUMENTS: see both documents:
Cable length guide line with internal multiplexers
Cable length guide line with external multiplexers
FAQ#076 - Why it is necessary add a termination resistor to the last digitized sensor of each RS-485 chain?
All SISGEO digitized instruments (IPIs, Tiltmeters, H-Level…) use the RS-485 serial communication protocol
The RS485 protocol contemplate a termination resistor.
The recommended chain connection is point-to-point (multidropped) nodes as a bus mode (line). Star, ring or multiply network connection are not recommended.
SISGEO dataloggers has already a termination resistor assembled (typically 120Ω). On the opposite side (sensors side) is necessary to mount a resistor on the last device of each chain.
Without termination resistors, reflections of fast driver edges can cause multiple data edges and consequently data corruption. Termination resistors also reduce electrical noise sensitivity. The value of each termination resistor should be equal to the cable characteristic impedance (typically, 120 Ω for twisted pairs and for only one chain).
SISGEO supply the correct termination resistor (120 Ω, 240 Ω, etc.), considering the number of the chains connected to the same master unit (logger):
- N.1 digital chain connected to one logger (OMNIAlog, digital node, ecc..): N.1 resistance, value 120 Ω
- N.2 digital chains connected to one logger (OMNIAlog, digital node, ecc..): N.2 resistances, value 240 Ω (one for each chain)
- N.3 digital chains connected to one logger (OMNIAlog, digital node, ecc..): N.3 resistances, value 360 Ω (one for each chain)
- N.4 digital chains connected to one logger (OMNIAlog, digital node, ecc..): N.4 resistances, value 480 Ω (one for each chain)
The termination resistor must be connected on the appropriate sensor connector.
At the following link an example scheme:
FAQ#075 - Which parameters are save into SISGEO digitized sensors?
All SISGEO digital sensors (IPIs, Tilt-meters, RDSs, H-Level etc..) use the serial RS-485 communication protocol.
The SISGEO digital sensors are joined through an electrical cable, so only one cable is used to take reading.
In agreement with Customer, they are configured in factory for:
- Calibration parameters
- Serial number
- RS-485 andress. Each digitized sensor has a univocal address also reported in a label on the cable.
- Powering type:
- always on (all digitized sensor switched on together). Faster solution, but high power consumption.
- timed (the sensors are powered and switched on one by one). Reading of the chain take a little bit more time than "always on", but the power consumpion is lower - Measuring units
FAQ#074 - Which kind of datalogger is necessary to read a SISGEO digital sensors?
The sensors are read connecting the end cable to a Modbus Master unit (i.e. OMNIAlog or miniOMNIAlog) with RS-485 interface (DCE, Half duplex, no Echo) able to manage communication with SISGEO Modbus RTU communication protocol.
SISGEO’s communication protocol is available for the release upon request.
The power [W] of power supply must be chosen according to the sensor quantity and power supply mode.
SISGEO suggests not to change the parameters set in factory (serial number, calibration, factors etc..)
The Modbus master unit (readout unit) must be set according to the IPI’s factory sensor configuration.
FAQ#073 - Which is the maximum number of digitized sensors (RS-485, Modbus), the maximum number of chains and the maximum length of cable in a RS-485 network?
Last update: October 2021
All the SISGEO digitized sensors utilize a RS485 interface with Modbus protocol.
1.The maximum number of digitized sensors in a RS-485 network are 247 (theoretical)
2.The maximum number of digitized sensors chains that is possible to connect to Modbus master unit (as OMNIAlog or miniOMNIAlog) are 4.
3. About the maximum number of sensors in a chain and lengths, please follow the next tables:
NOTE: The sum of “A” and “C” lengths can’t exceed 1000m. The compliance of points A and B, avoids the excessive voltage drop on the RS-485 line and guarantees the correct RS-485 network operation.
FAQ#072 - Why pushing RUN in a miniOMNIAlog webpage with 3G/2G modem the local connection with the PC gets lost?
The loss of the local connection with the PC is normal. This happens because the communication “bus” is the same between PC and miniOMNIAlog and between miniOMNIAlog and 3G/2G modem. Therefore, if you start miniOMNIAlog from the web, the communication is directed towards the 3G/2G modem. This allows to the modem to send SMS, e-mail or data on FTP server in case of need.
FAQ#071 - Why miniOMNIAlog is supplied through the PC when it is connected through USB?
This feature allows to not consume the internal batteries during the configuration phase or during the data download.
In this way, independently from the duration of the activities above described, the internal batteries are used only during the field activities (acquisition, data dispatch etc). This guarantees a superior duration of exercise.
FAQ#070 - If you disconnect the USB cable from miniOMNIAlog, the datalogger resets. Is it normal?
Yes, it is. This takes place because when you connect the PC though USB connection, miniOMNIAlog is powered by the PC. If you disconnect the USB cable, miniOMNIAlog resets to change its supply source and returns to the supply through internal battery or from an external source (solar panel or electrical supply).
FAQ#069 - If miniOMNIAlog is supplied with internal batteries, can it read the digitized sensors SISGEO?
No, in case you have to read the SISGEO digitized sensors, it is necessary to use an additional module of power supply (code 0OMX24V030W). This is necessary to power the instrument with the necessary power supply.
This module considers the supply or from solar panel or electrical.
FAQ#068 - Using miniOMNIAlog, is it possible to do acquisitions leaving it connected to the PC?
No, it is not possible.
miniOMNIAlog, to do correct measurements, needs to be powered or from the internal battery or from an external power supply (solar panel, electrical supply) to supply to the connected instruments the right tension and current.
Leaving connected miniOMNIAlog to the PC through USB cable, the instrument is powered directly to the PC. The USB port supplies a tension of 5Vdc and a maximum current of 500mA. These values guarantee the correct functioning of miniOMNIAlog for what concerns its management (configuration, web server surfing etc.) but they don’t guarantee the correct functioning in case of acquisitions.
Therefore, it is necessary to physically disconnect the PC from miniOMNIAlog during the acquisition cycles to do correct measurements.
FAQ#067 - Is it possible to avoid the manual configuration of the dial-up remote connection and of the virtual modem necessary to communicate with miniOMNIAlog?
Yes, it is. You have to use the tool “miniOMNIAlog communcation tool” that you could find on the USB pen supplied together with miniOMNIalog and on SISGEO website in the product section.
It is not necessary to install the tool on the PC. Once you extracted it in a PC local folder, simply starting it, it is possible to do automatically both the configuration of the dial-up remote connection and the virtual modem configuration.
The addition of new miniOMNIAlogs is totally automatic. It is sufficient to connect the new miniOMNIAlog and start the software. In this case the tool adds the virtual modem associated to the new miniOMNIAlog to the already existing dial-up remote connection.
The tool is compatible with Microsoft Windows 7, Microsoft Windows 8 in version 32bit and 64bit.
FAQ#066 - Why opening the file of log .CSV of OMNIAlog/miniOMNIAlog in French with Microsoft Office Excel some “strange” characters are visualized instead of some letters?
The cause of this is problem is that Excel opens the CSV files with an incorrect encoding. In the CSV files in French, there are some particular characters (example: “é”, “à”) that, to be correctly visualized, need the encoding UNICODE UTF-8. This encoding is not that of default of Excel, so the file is codified in a non-opportune way.
To correctly visualize the characters it is necessary (*):
- open Excel;
- select from the menu bar the tab “Data” and then the entry “From text”;
- in the window that displays, select the CSV file that you want to open;
- a window of file settings opens; select the entry “Delimited” and in the field “File origin” select “65001: Unicode (UTF-8)” and push “Forward”;
- in field “Delimiters” select “Comma” and push “Forward”;
- in the new screen push “End”
- in the window “Import data” push “OK”
* example executed on Microsoft Excel 2010
FAQ#065 - What kind of cable I have to use if I want to connect OMNIAlog to a PC using a LAN cable?
For a direct connection between PC and OMNIALOG, the right cable to use is a CROSSED cable.
However, it could happen that also using a STRAIGHT LAN cable, it is possible to establish the connection with OMNIAlog. This occurs because from 2011 it has been realized a function called Auto-MDIX, that is available on some Ethernet (NIC) network cards. Auto-MDIX is a physical auto-sensing directly implemented on the NIC of the used PC. Furthermore, on this PC it has to be installed the specific driver of the same card. This is necessary because with the generic drivers of Microsoft Windows this function couldn’t work correctly despite it is on the NIC.
To understand if the NIC supports the Auto-MDIX it is necessary to verify it on the technical sheets of the used PC.
Anyway, it is possible to generalized saying that if a PC works with Microsoft Windows 7 or Microsoft Windows 8 (and any hardware post 2011), it has this function enabled in the 90% of cases. Pay attention if you own a PC with Microsoft Windows XP as operating system.
FAQ#064 - If I’m using the 3G/2G modem connected on port RS232 of OMNIAlog, can I simultaneously use the LAN connection, too?
No, when you use the modem connected on port COM RS232, OMNIAlog is configured (through its webserver) to transmit the traffic on serial port. This could cause connection problems if you connect the PC on the LAN port of OMNIAlog.
To use the communication on LAN port, it is necessary to disconnect the RS232 cable (or from OMNIAlog or from modem) and reboot OMNIAlog. OMNIAlog, at reboot, tries anyway to communicate with the modem through the port COM RS232 but it doesn’t find any answer, so the communication is transmitted on LAN port.
When the activity on LAN port is finished, it is necessary to do the opposite procedure: disconnect the LAN cable, connect the RS232 cable (and so the modem) and reboot OMNIALog. At reboot, OMNIAlog tries to communicate with the modem and, finding a valid answer, transmits the communication on serial port.
FAQ#063 - Is it possible to connect to OMNIAlog and download data through a 2G (GSM/GPRS) or 3G (HSPA,UMTS, EDGE, GPRS,GSM) modem connected on port RS-232?
Yes. It is possible to connect to OMNIAlog and download data also by means of a Dial-up connection (with protocol PPP). The connection is established using a modem on the normal low frequency voice telephony. The connection is established through the composition of a normal telephonic number, using opportune programs called “dialer”.
The maximum speed is 9600bps, therefore the download of data from OMNIAlog could be very long.
In addition, the connection to the network ceases at the end of the call. The accidental interruption of the telephonic connection determines the disconnection of the client computer from the network. This causes the failure of the download, forcing the user to restart from the beginning.
SISGEO suggests to use the Dial-up PPP connection only in case of emergency.
The use of a 2G modem or 3G modem connected to OMNIAlog is necessary to send data through e-mail or on FTP server, or to send alarm SMS.
For remote connection to OMNIAlog, on mobile network, it is therefore preferable to use HSPA router.
FAQ#062 - Which ports use OMNIAlog services?
It is possible to have access to OMNIAlog mini webservers on board using any internet browser. OMNIAlog could be configured to send data / alarms through e-mail and on FTP. In addition, it has a FTP server on board and a command line mode that uses the TELNET protocol.
To use these services, OMNIAlog utilizes the following ports:
TELNET: 23
FTP SERVER: 21
SMTP: 25 (default) or that used from the user account
WEB SERVER: 80
FAQ#061 - Does the 2G (GSM/GPRS) modem of miniOMNIAlog support 3G networks?
No. The internal modem of miniOMNIAlog is a 2G (GSM/GPRS) modem and therefore it doesn’t support 3G (UTMS) and superior networks. We recommend to ascertain with your ISP (Internet Service Provider) the presence of the 2G signal in the place chosen to install the datalogger. Otherwise, miniOMNIAlog couldn’t establish an internet connection through its modem. Normally, 3G network represents an evolution of 2G network but with different antennas and network devices. It is a common practice to maintain in operation both networks to give a global covering to all users. However, in those countries that in the past were never covered by wireless systems (2G network), the new installations consider the adoption of the last existing technology (3G or 4G networks). For this reason, there could be places where there is only a 3G signal and no 2G signal.
FAQ#060 - Which characters is it possible to use in the editable fields of OMNIAlog webpages?
The characters supported by OMNIAlog webpages and by the export files are those of the standard ASCII charts (not extended). In addition to all the alphabet letters and numbers, the characters supported are:
You can find an example of an ASCII chart at the following link:
NOTE: The maximum number of characters for IDENTIFICATION and DESCRIPTION fields is respectively 12 and 8.
FAQ#059 - Which characters is it possible to use in the editable fields of miniOMNIAlog webpages?
The characters supported by miniOMNIAlog webpages and by the export files are those of the standard ASCII charts (not extended). In addition to all the alphabet letters and numbers, the characters supported are:
You can find an example of an ASCII chart at the following link:
NOTE: The maximum number of characters for IDENTIFICATION and DESCRIPTION fields is respectively 12 and 8.
FAQ#058 - To communicate through USB connection with miniOMNIAlog, is it necessary to install some software or driver?
Yes, to communicate with miniOMNIAlog by USB connection a small driver (FTDI Driver) is needed, to permit to the PC to recognize the miniOMNIAlog. Usually, if your PC is already connected to the internet when you connect miniOMNIAlog, Microsoft Windows is able to download and install this driver automatically. If Microsoft Windows does not install the driver automatically or your PC is not connected to the internet, you can download the driver for free at the following link:
http://www.ftdichip.com/Drivers/VCP.htm
You have to do this operation only one time for each PC utilized with miniOMNIAlog. After that, every time a new miniOMNIAlog is connected to these PCs, it will be automatically recognized because the driver is already installed on your PC. SISGEO suggests to check periodically the new releases of driver at the previous link.
FAQ#057 - OMNIAlog powered by internal batteries: what to expect?
With the internal batteries power mode, OMNIAlog is automatically configured to work with reduced speed (20MHz) and the network adapter card is forcedly shut down to minimize power consumption.
Normal working expects only the data download through USB flash drive, so it’s not necessary to turn on the network adapter card.
OMNIAlog configuration through web pages should be carried out powering OMNIAlog with an external power supply unit to avoid draining the internal batteries. So if you need to configure OMNIAlog we recommend to remove for a while the internal batteries and configure OMNIAlog to work with external power supply.
FAQ#056 - Are SMTPS (SSL) and SFTP supported by OMNIAlog?
OMNIAlog can be configured to send readings file by e-mail using simple authentication (SMTP) or on simple FTP.
SFTP and SMTPS (SSL) are not supported.
OMNIAlog does not manage the security certificates.
OMNIAlog does not support also encrypted authentication (i.e. NTLM, MD5 etc.).
However, SISGEO supplies the datalogger carrying an already configured SMTP account, to allow the sending of e-mail (for sending data and alarm notifications).
The SMTP account will have the following format omniaNNNN@
FAQ#055 - Using the miniOMNIAlog system, is it necessary the grounding system?
To make efficient and effective the protections of miniOMNIAlog, it is INDISPENSABLE to have a grounding system. The ground is no longer necessary to guarantee quality-measurements (“measurement ground”), but it is considered only as “functional ground”.
FAQ#054 - Can the connected PC power the miniOMNIAlog?
MiniOMNIAlog can be powered from 6 AA batteries or through an external power supply (i.e. from a little solar panel).
To preserve the batteries life, during PC connection, the power supply is automatically taken from the PC through USB cable connection. In any case a power supply (internal batteries or external power supply) is necessary to be connected.
NOTE: max current permitted on the mini USB connector is 500mA. It is not possible turn on the GPRS modem when the USB cable is connected to the PC and it is not possible to power the digitalized sensors connected to the RS485.
FAQ#053 - SIM card for 3G/2G Modem
If the miniOMNIAlog has equipped with the internal 3G/2G modem a SIM with APN for internet connection is needed. The SIM selected must be enabled for internet traffic to send e-mail and file on FTP Server (for further details call your ISP “Internet Service Provider”). SISGEO suggest a Flat profile.
FAQ#052 - Is it necessary to use an isolated USB cable?
USB port in miniOMNIAlog is not isolated.
For the connection between PC and miniOMNIAlog, SISGEO recommends to use an isolated USB cable:
this is the professional tool to avoid and fight ground loops and equalizing currents and to protect against overvoltage, that could damage miniOMNIAlog or cause flood readings.
Isolated USB cable is especially recommended when the PC and miniOMNIAlog are connected to the main electricity network.
FAQ#051 - Which communication interfaces are possible to use with miniOMNIAlog?
Only the internal GPRS module is supported.
FAQ#050 - Are SMTPS (SSL) and SFTP supported by miniOMNIAlog?
miniOMNIAlog can be configured to send readings files via e-mail or on FTP server, using simple SMTP authentication protocol or FTP simple protocol. The protocols SFTP and SMTPS (SSL) are not supported. miniOMNIAlog does not support security layer. miniOMNIAlog also does not support encrypted authentication (eg. NTLM, MD5 etc.).
However, SISGEO supplies the datalogger carrying an already configured SMTP account, to allow the sending of e-mail (for sending data and alarm notifications).
The SMTP account will have the following format momniaNNNN@
FAQ#049 - Does miniOMNIAlog support remote connection?
No, to manage (i.e. to configure) a miniOMNIAlog it is necessary to connect a PC directly through an USB cable.
FAQ#048 - Is it possible to use an Apple Mac to manage a miniOMNIAlog?
No software is necessary to be installed: simply connect the PC to the USB port and establish a dial-up PPP connection.
Last Apple Mac Operating System seems not support anymore dial-up PPP connection.
FAQ#047 - Is it possible to change channels configuration of miniOMNIAlog?
Power supply type (internal batteries or external power supply), the measure type of each analog channel (current, voltage, NTC, Wheatstone bridge) and the presence of the GPRS module are configured at the factory. The user is not able to modify these settings.
FAQ#046 - OMNIAlog: something to know to communicate with optical fiber technology
The optical fiber interface you can find in SISGEO catalogue is an ethernet switch with 4 10/100Base-TX ports (to link other LAN devices, in addition to OMNIAlog) and 2 100Base-FX ports (store and forward architecture). This interface is suitable for multi-mode fibres (50/125µm and 62.5/125µm) that allow lengths of maximum 2 km; for longer sections, you need to use a different model and single-mode fibres (9/125µm).
Generally, the supplied cables (“trunks”) have 4 mono-tube fibres, of which 2 are only in store. In SISGEO catalogue, the fibre is already connectorized (with SC-connectors) , but this solution is appropriate only if sections don’t exceed 200-300mt.
Despite they are equipped with a protection system for connectors and with a traction system for laying, it is difficult to trail some pre-connectorized trunks from a well to another for long distances. The maximum applicable traction force is approximately 500N, about 50kg. Furthermore, you need to take into account the weight of the same cable, rubbing and friction. For long lengths, it is advisable to do the connectorization on site (the intervention of a specialized technician with the right equipment is needed).
FAQ#045 - Using the OMNIAlog system, is it necessary the grounding system?
To make efficient and effective the protections of miniOMNIAlog, it is INDISPENSABLE to have a grounding system. The ground is no longer necessary to guarantee quality-measurements (“measurement ground”), but it is considered only as “functional ground”.
FAQ#043 - Can OMNIAlog acquire 8 or 16 instruments, without any multiplexer boards?
OMNIAlog is nominally a datalogger with 8 differential channels.
For every one of the 8 differential channels it is possible to connect up to:
- N.2 2-wires 4-20mA (current loop)*
- N.2 3 or 4-wires 4-20mA*
- N.2 potentiometers with a 3-wires Volt output*
- N.2 4-wires Volt-output instruments*
- N.1 6-wires biaxial servo-inclinometer
- N.1 5-wires uni-axial servo-inclinometer
- N.1. 6-wires electrical load cell (Wheatstone bridge)
- N.1 4-wires platinum resistance PT-100
- N.1 NTC Thermistor
- N.1 vibrating wire
- N.1 vibrating wire + NTC Thermistor
* channels with power supply shared on the same channel
FAQ#042 - Is it possible to connect a rain gauge to OMNIAlog datalogger?
Yes, the rain-gauge is connected to one of the two digital input placed in the posterior side of OMNIAlog.
For the system autonomy, it is necessary to bear in mind that OMNIAlog connected to a rain-gauge it is always in measurement mode. Therefore, it will never go in “sleep-mode”.
OMNIAlog takes a sample of the sensor continually and every 60 minutes it saves data. This interval is not configurable. At the end of every acquisition cycle, the reading is automatically reset.
FAQ#041 - 3G/2G modem or 4G/3G router: which technology should be chosen?
The use of 3G/2G modem is allowed only in these events:
- when it is necessary only the transmission of data on user’s FTP server or e-mail automatically after every capture or one time per day)
- when it is necessary to send an SMS in case of warning
With 3G/2G modem, the remote connection has to be considered an emergency connection. Pages uploading is extremely slow in case of inadequate signal quality. The remote connection requires a pc equipped with a GSM modem or an analogic modem connected to the phone network (not digital and not passing through telephone exchanges).
SIM card has to be:
- Internet-enabled (with APN) for the transmission of data on FTP
- M2M for remote connection
CONCLUSION: In case of need to manage OMNIAlog from remote, it is strongly suggested the use of routers 4G/3G.
FAQ#040 - Does the management of 4G/3G router change according to the power supply of OMNIAlog?
There are two communication alternatives, varying according to the power sources available on site:
- with AC power supply it is possible to set up OMNIAlog to leave the router always turned on; therefore, the user could connect to every OMNIAlog with an Internet connection at any time;
- with photovoltaic panels supply, being the router consumption very high, OMNIAlog has to be programmed to leave the router always turned off. The router has to be turned on only after every data capture (or one time per day) to transmit automatically the data on user’s FTP or by e-mail. In addition, the router will turn on in a 15-minutes temporary window, one time per day: during this temporary window the user can connect to OMNIAlog to set up the datalogger (once you are connected, you can stay online for all the necessary time).
FAQ#039 - 4G/3G Router: which to choose?
In order to connecting to OMNIAlog using the Internet, it is necessary to install a 3G router inside the OMNIAlog box and to insert a SIM card (with APN) into the router. This card should be Internet enabled (SIM card not included).
DUTIES:
1 - Dynamic IP traceability
- SOLUTION A: when you send a SMS to the SIM card number, the router communicates the current IP address, that is assigned by the provider (this operation has to be done every time you want to access from remote)
- SOLUTION B: you should create an account on a service website (for example DynDNS). Thus, the dynamic IP address will be always updated without any user intervention.
- SOLUTION C: the user has to have a data SIM card with APN and STATIC IP.
2 – Incoming traffic block (it depends from the provider) If the provider blocks the incoming traffic of data, the only usable router is mod. 0OMXROUTVPN
- ROUTER INTERNET HSPA-VPN HTTP (mod. 0OMXROUTVPN) With this router the user has only to get an Internet enabled SIM (with APN). The above mentioned problems could be solved thanks to a free VPN service and the configuration done at Sisgeo laboratories using all the data supplied through the “APPLICATION FORM”
- ROUTER INTERNET HSPA 4G (mod.0OMXROUT4G0) With this router, users have to get an Internet enabled SIM card (with APN) that allows the bi-directionality (both the incoming and outgoing traffic).
CONCLUSION: with router 0OMXROUTVPN the problems of providers that supply Internet enabled SIM (with APN) only for outgoing traffic (not bi-directional) and the dynamic IP traceability could be solved. If the provider doesn’t display these critical issues, it is possible to use router 0OMXROUT4G. The dynamic IP traceability could be solved as mentioned above.
FAQ#038 - Do I have to power the TEL-310S before start to set-up and use it?
If the TEL-310S was supplied 2 or more month before, will be better to power it for 8 hours before starting to set-up and use it. This is to recharge the back-up battery that give troubles if it is completely discharged.
FAQ#038 - Do I have to power the TEL-310S before start to set-up and use it?
If the TEL-310S was supplied 2 or more month before, will be better to power it for 8 hours before starting to set-up and use it. This is to recharge the back-up battery that give troubles if it is completely discharged.
FAQ#037 - Which is the linear thermal expansion coefficient of the graduated flat cable (tape) of Water Level Indicators (WLI) and BRS settlement probes?
The linear thermal expansion coefficient of the flat graduated cable is 16x10E-6 m/ °C.
FAQ#036 - Which is the right mix for inclinometer casing grouting?
There is not an exact ratio for each kind of soil. It depends from many factors that could change for every geological and geotechnical situation. Anyway the grouting should be similar to the soil even if is not really possible to match both characteristics.
Approximate Cement/Water/Bentonite mix ratio are:
- for hard and medium soil: 1 / 2.5 / 0.3 (i.e. 50kg / 125kg / 15kg)
- for soft soil: 1 / 6.5 / 0.4 (i.e. 50kg / 325kg / 20kg)
The right way to mix the materials is:
1. mix the water and cement
2. add and mix the bentonite
The results have to be similar to an heavy cream.
The ratio of the cement and water determine the strength of the grout. More water decrease the strength.
- A grout too thick will be difficult to pump.
- A grout too thin solidifies and the water will separate from it.
- A mix too watery could separate cement ( on the bottom) from water and bentonite (on the top).
FAQ#035 - In what consists a profiler? Which is its function?
The profiler consists of:
- a stainless steel measurement sensor for pressure measures;
- a cable reel containing the liquid tank;
- an electro-hydraulic cable for signals transmission;
- a tripod on which the reel/tank should be positioned.
The electro-hydraulic cable follows the probe (measuring sensor) to which it is connected. A small steel cable to pull the profiler probe is also provided; it should be situated into the same HDPE tube where the probe pass through (readings with two operators with both sides of HDPE tube accessible) or in a second tube located parallel to the first one (readings with one operator or one not-accessible side; in this last case a pulley system is recommended).
Finally, what you need to execute readings with the profiler is only a probe in HDPE with diameter ≥ 50 mm. We suggest you the HDPE and not a metallic tube because this kind of tube (without crash-it) must be adapted to the embankment differential settlements. It is advised to use a HDPE tube with diameter which is not more than 50mm to avoid mistakes or less accuracy in readings.
FAQ#034 - Is possible to repair/change the manometer without disassemble the load cell?
It is not possible to repair/change the manometer without disassemble the load cell. The scope of the glycerine inside of the manometer display is only to show eventual tampering of the manometer. The load cell work properly without glycerine, too.
FAQ#033 - I have received the calibration Report of a piezometer. There is not the K Thermal Factor noted. In which way may I proceed?
If the value is not indicated in the Calibration Report, you should use this formula: K = -1 digit/°C For each degree of increase of temperature you should reduce 1 digit.
FAQ#032 - Which is the reading method of the new generation of SISGEO vibrating wire readouts and loggers?
For VW sensors Sisgeo has developed automatic algorithms to search for the resonant frequency in case of environmental noise or poor signal. In this way you can distinguish between the natural frequency of the sensor and the frequency of the noise, thereby reducing measurement errors and false alarms.
This method also provides improvement in the resolution.
A parameter, logged with the reading, shows the ‘quality’ of the readings. The reading quality parameter allows miniOMNIAlog and OMNIAlog to retake the measure automatically (second step) from a different start frequency.
From OMNIAlog FW ver. 7.13.19, miniOMNIAlog FW ver. 0.12.22 and CRD-400 FW ver. 1.0.31 an adaptive excitation method is added. Also a ‘tracking’ function has been added to avoid the phase of the wire research in order to reduce the measurement time.
OMNIAlog and miniOMNIAlog dataloggers also let you set some parameters (Excitation time [msec], Delay time [msec], sweep range [Hz]) for each channel.
FAQ#031 - Is the DEX system suitable for in-place applications?
DEX system has been designed for automatic soil settlement monitoring (vertical movement) in unattended location. DEX system consists of a string of DEX probes installed in borehole within a ABS inclinometer casing. DEX-S, the combined inclinometer-settlement probe, provides both horizontal movements (X, Y-axis) and vertical settlement (Z-axis) for 3-D borehole automatic profile monitoring.
FAQ#030 - Why do the NATM pressure cells have repressurizing tubes?
NATM pressure cells are normally used to measure tangential and radial stresses in concrete tunnel lining. They are embedded in concrete and after curing the cell shall be repressurized to mantain the intimate contact between the pessure pad and the surrounding material.
FAQ#029 - What is the Real Gauge Factor reported in the Specifications and Compliance Certificates of both VW embedded and arc-weldable strain-gauges?
The gauge factors for VW strain-gauges are generic factors calculated from the dimensions and the physical properties of the gauge material. The VW strain-gauges arep roduced in series with industrial method, so each strain gauge is equal to the other: it means that the gauge factor of VW strain gauges do not change.
The Gauge Factor is checked on some strain gauges from each manufacturing batch.
FAQ#028 - Are the vibrating wire strain-gauges and spot weldable VW strain gauges equipped with temperature sensors?
Yes, vibrating wire strain-gauges, as well as all other Sisgeo's vibrating wire instruments, are equipped with a built-in NTC thermistor YSI 44005 type (3000 Ohm at 25°C). Thermistor is included in the instrument price and therefore there is not additional cost for it.
FAQ#027 - Which type of damping fluid is recommended for filling the pendulum tanks?
We recommend to use the following mineral oil with selected viscosity:
SAE 50-90 for direct pendulums
SAE-10 for inverted pendulums.
FAQ#026 - What can we do when the inclinometer casing 'float' during installation?
If the water filled casing is lighter than grout backfill the uplift force of grout varies with the height of the grout column. If the column is short, the uplift force is low and the casing can be held in place by its own weight or with very little down-force applied from the top. When the grout sets, the bottom cap is isolated from the column of grout and there is no surface for the uplift force to act on. No more than two or three meters to 3 m need to be grouted in the first stage. If the normal bentonite/cement grout is used it needs to set for at least 12 hours before second-stage grouting.
Avoid use of a quick-set grout, since the heat of hydration could melt and deform the plastic. The two stages can be placed via an outside tremie pipe. Alternatively the first stage can be placed before lowering the casing, provided that all is done efficiently so that there is no chance of the grout setting prematurely.
FAQ#025 - How get good readings with inclinometer probe?
A good practice for getting good readings with inclinometer probe is to follow these simple operations: – Use the same probe for each survey, if possible; – if you must use a different probe, be sure to note the serial number of the probe used for each survey, so any necessary corrections can be made during data processing; – protect the probe from shock, which contributes to zero shift and sensor rotation.
Transport the probe in its carrying case. – power up the probe before you lower it into the borehole. – wait 10 minutes for the probe to adjust to the temperature of the borehole up to the displayed readings will be stabilized within two units and validate data; – validate data on site using checksum statistics, if you are using the Nadir readout.
FAQ#024 - How can we keep efficiently the inclinometer operating cable?
A good practice for the inclinometer users is to follow these simple recommendations: – when you connect the inclinometer operating cable to the probe, avoid overtightening the nut, since this will flatten the O-ring and reduce its effectiveness; – use a pulley assembly. It protects the inclinometer operating cable and provides a good reference index; – when very high precision is expected, it may be useful to periodically record the date and the precise length of your inclinometer operating cable; – perform regular maintenance.
FAQ#023 - For obtaining best results with inclinometer, must the borehole be very close to the vertical?
Borehole should be drilled as close to the vertical as possible, however 2/3 degrees from vertical are normally accepted in specifications.
FAQ#022 - Why NATM pressure cells have repressurizing tubes?
NATM pressure cells are normally used to measure tangential and radial stresses in concrete tunnel lining. They are embedded in concrete and after curing the cell shall be repressurized to mantain the intimate contact between the pessure pad and the surrounding material.
FAQ#021 - Is the repressurizing hand pump for NATM pressure cells filled by de-aired oil, ready to use? Which kind of oil is used for this purpose?
Yes it is. The pump is filled at factory under vacuum with de-aired oil. For normal use within concrete the oil inside the pump is enough to repressurize 50 pcs. of NATM pressure cells. The oil we use is Edwards Ultra-grade 19 type for vacuum-pump use.
FAQ#020 - How to obtain better results from pressure cells installed in earthfill?
The measurement of total pressure in geomechanics, even if is one of the most interesting parameters for the designer, is generally considered not reliable. Case histories report more nonsuccessful examples than for all the other types of measurements. Theoretical studies made by many researches have highlighted the critical parameters in the design and manufacturing of pressure cells. If the instruments are accurately designed and manufactured and the choice of the model has been done properly, the problem becomes how to use the cell.
In the paper presented by Mr. D. Bruzzi and Mr. A. Zattoni (SISGEO) and Mr. G. Pezzetti (ISMES) at 5TH International Simposium FMGM/99 in Singapore, the authors discuss the main issues related both to laboratory calibration and field installation problems, and a practical approach is presented in order to improve the quality of the results.
The conclusion is that pressure cells provide relative measures that can become absolute by using simple and practical rules deriving from a good knowledge of the basic problems related to design, manufacturing and installation of total pressure cells. For a complete view of this paper, click here to download the .pdf file.
FAQ#019 - Which is the difference between HAE (high-air entry) and LAE (low-air entry) filters?
HAE (High air entry) filters are normally used to monitor pore pressure in the clay core dams and saturated low permeability soils. “High air entry” means high-resistance to air entry when the filter is saturated. The surface tension of the water in the very fine porus of the filter prevents entry of air. The HAE filters must be saturated before installation by means of the saturation device.
LAE (Lowair entry) filters are often used in medium and soft soils. They do not need to be saturated by special device because the porosity of the filter permits water entry with simple immersion.
FAQ#018 - What kind of overvoltage protection is built in the vibrating wire piezometers?
A plasma surge arrestor is wired in parallel with the coil (which is used to pluck the wire). The nominal impulse discharge current 8-20 microsec interval is 10 KA. Impulse spark-over voltage at 1Kv/ microsec: 700 V.
FAQ#017 - Can we buy spare parts for replacement of the water level indicator probe and repair it ourselves?
Yes, we sell a kit which includes instructions, probe, weights, rexin, and any other parts.
FAQ#016 - Are the vibrating wire piezometers equipped with temperature sensors, or is the temperature sensor an option?
Yes, each vibrating wire piezometer, as every Sisgeo vibrating wire instrument, is equipped with a built-in NTC thermistor YSI 44005 type (3000 Ohm at 25°C). Thermistor is not a option for vibrating wire instruments and therefore there is not additional cost for it.
FAQ#015 - The anchor load value displayed on the load cell manometer or readout does not agree with load calculated by the hydraulic jack. What's right?
The main factors which influence the anchor measurements are:
– axial misalignment of the jack
– difference in diameter between the jack and the load cell.
These factors cause bending of the bearing plate between the load cell and the jack and affects the response of the cell. To minimise this effect use the genuine distribution plate which loads properly the sensitive upper ring of the load cell.
FAQ#014 - What is the multipoint settlement system to monitor settlement in embankment fills and foundation soil?
The multipoint settlement system consists of four main components: a string of pressure gauges, a liquid filled tubes, electric cables and a reference gauge with reservoir of liquid. The pressure gauges are embedded in the soil and by tubing connected to the reference gauge which shall be located at higher elevation on a stable ground, away from the construction activities. The pressure gauges measure the pressure created by the liquid column in the tubing.
The height of the liquid column is equal to the difference in elevation between the pressure gauges and the reference gauge. Electric cables provide connection to OMNIA data acquisition unit for automatic monitoring.
FAQ#012 - How is important the function of the grout to the operation of the spider magnets?
The arms of the spider only keep the magnet in place while grouting, but the grout couples the magnet to the surroundig soil. Grout mix shall be controlled (ratio water/cement) during grouting operation according to the soil application.
FAQ#011 - Are the air bubbles present in the liquid mix cause of errors?
Sisgeo liquid mix is de-aired at factory and it is supplied sealed in special tank. However in the DSM reference gauge there is a high sensitive sensor which is able to monitor the weight of the liquid within the reservoir. In the case of the air bubbles come over decreasing the level of the liquid in the reservoir the sensor measures this change. Thus air bubbles are not usually a problem.
FAQ#010 - Which is the freezing temperature of the Sisgeo liquid mix for H-Levels LLS and Multipoint Settlement Systems system liquid?
Sisgeo liquid is a de-aired water-glycole mix (70% - 30%). The freezing temperature is about -15°C.
FAQ#009 - Can the TEL-310S functioning be influenced from atmospheric conditions?
Any factor (water, mud etc.) that could dirty the internal part of the “SUS” optical sensor unit’s cover can influence the TEL-310S correct functioning. So it is essential to protect properly the “SUS” optical sensor unit from weather conditions, leaving anyway the access possibility for cleaning/maintenance.
In any case, TEL-310S has an auto-diagnostics able to alert the user for the maintenance. Sample solution used to protect the instrument (old TEL-310) from weather conditions.
FAQ#008 - What is the 0TEL310CAL0 calibration/mounting kit and what is it for?
The 0TEL310CAL0 kit includes a drilling template for the wall where the “ANS” support will be placed, and a template to be placed on the “SUS” optical sensor unit for a possible functional check on field (pendulum’s wire simulation).
FAQ#007 - Are the TEL-310S CUS control unit and the PWS power unit supplied with the fixing kit?
No kit is needed. The “CUS” and “PWS” units are placed in aluminum boxes ready to be fixed on the wall through four M6 screws (not included).
FAQ#006 - Is it possible to use the ANS adjustable support for the pendulum optical manual readout (coordinometer)?
The pendulum readout fixing plate has four holes so it can be fixed, through screws, to the “ANS” adjustable support.
FAQ#005 - Is it possible to fix the ANS adjustable support to the floor?
Since the “ANS” support is articulated, it can be fixed to the floor; this can be useful in case the pendulum’s wire is too far from the walls.
FAQ#004 - Is it possible to place the SUS optical sensor unit with the X axis perpendicular to the wall where the ANS support is fixed?
The TEL-310S telecoordinometer has the following measuring range:
- X axis: 145mm (150mm nominal),
- Y axis: 60mm.
To use the “ANS” adjustable support you must have the “X” axis parallel to the wall: so it is not possible to fix the “SUS” optical sensor unit perpendicular to the wall using the “ANS” adjustable support.
FAQ#003 - Which are the needed conditions to use the ANS adjustable support for TEL-310S if you need to monitor the direct pendulum's wire?
To fix the “SUS” optical sensor unit through the “ANS” support, it is necessary that the direct pendulum’s wire is at a distance of d=230 mm. from the wall.
To achieve that, the direct pendulum’s tank has to be placed at a distance of D=20 mm. from the wall: in this way is guaranteed that the pendulum’s wire is exactly at the center of the “SUS” optical sensor unit.
FAQ#002 - What is the 0TEL310ANS0 adjustable support for TEL-310S and what is it for?
The “ANS” adjustable support (0TEL310ANS0) has been developed to support and fix the “SUS” optical sensor unit (0TEL310SUS0) of the new TEL-310S telecoordinometer. The support is fixed to the wall through two M16 threaded bars, of 370 mm. length (supplied). Once the “SUS” optical sensor unit is fixed to the support, it is possible to adjust the settings in order to place the pendulum’s wire in the chosen position within the instrument measuring range.
FAQ#001 - If the SUS optical sensor unit is removed for maintenance, is it possible to continue the monitoring using the pendulum optical manual readout?
It is possible to use the pendulum optical manual readout instead of TEL-310S “SUS” optical sensor unit without any regulation of the “ANS” support.
It is also possible to start the pendulum’s monitoring with the pendulum optical manual readout and then automate the readings with TEL-310S telecoordinometer , without changing its initial zero.