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 […]
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: * 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 […]
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: 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 […]
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:
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 2 – Incoming traffic block (it depends from the […]
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: […]
FAQ#035 – In what consists a profiler? Which is its function?
The profiler consists of: 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 […]
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.