Frequently asked questions
Sisgeo digital instruments can operate in two powering modes: TIMED or ALWAYS-ON (for more information see F.A.Q.#094).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 […]
- BH-Profile in-place Inclinometers, D-Tiltmeter - Digital MEMS Tiltmeters, DEX and DEX-S 3D extenso-inclinometers, Electric Anchor Load Cells, H-Level - Liquid Level Systems, Horizontal In Place Inclinometers, LT-Inclibus array, MD-Profile array, MEMS In-place Inclinometers, Tilt Beam (TB) sensors, WR LOG wireless dataloggers
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 […]
- Convergence extensometer, Drive-in piezometers, Earth Pressure Cells, Electric Anchor Load Cells, Electrical Crackmeters and Jointmeters, Electro-hydraulic Load Cells for Steel Linings and Struts, Fixed Extensometers, Flat Jack Testing Accessories, H-Level - Liquid Level Systems, MEMS Analogue Tilt Meters, MEMS In-place Inclinometers, MEXID Miniaturized MPBX, Mini OMNIAlog datalogger, MPBX - Multipoint Borehole Extensometers, Multipoint settlement gauges, Piezo-resistive piezometers, Removable pressure transducers, Solid Resistive Load Cells for Pile Testing, Titanium piezometers, Vented pressure transducers, Wire Crackmeters, Wire Deformeters
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 […]
- BH-Profile in-place Inclinometers, H-Level - Liquid Level Systems, Horizontal In Place Inclinometers, LT-Inclibus array, MD-Profile array, MEMS In-place Inclinometers, WR LOG wireless dataloggers
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 […]
- BH-Profile in-place Inclinometers, D-Tiltmeter - Digital MEMS Tiltmeters, H-Level - Liquid Level Systems, Horizontal In Place Inclinometers, LT-Inclibus array, MD-Profile array, Mini OMNIAlog datalogger, OMNIAlog Datalogger, Tilt Beam (TB) sensors
All SISGEO digital sensors (e.g. IPI, BH Profile, MD Profile, LT Inclibus, Tilt-meter, RDS, H-Level, etc.) use the Modbus communication protocol over RS-485 serial. SISGEO digital sensors are connected to each other with a single signal cable. The parameters that are configured at the factory for each digital sensor are as follows: Upon confirmation of […]
- BH-Profile in-place Inclinometers, D-Tiltmeter - Digital MEMS Tiltmeters, Digital MEMS Inclinometer System, H-Level - Liquid Level Systems, Horizontal In Place Inclinometers, LT-Inclibus array, MD-Profile array, MEMS In-place Inclinometers, MEXID Miniaturized MPBX, Tilt Beam (TB) 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 […]
- BH-Profile in-place Inclinometers, D-Tiltmeter - Digital MEMS Tiltmeters, Digital MEMS Inclinometer System, H-Level - Liquid Level Systems, Horizontal In Place Inclinometers, MEMS In-place Inclinometers, Mini OMNIAlog datalogger, OMNIAlog Datalogger, Tilt Beam (TB) sensors
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 […]
- BH-Profile in-place Inclinometers, D-Tiltmeter - Digital MEMS Tiltmeters, Digital MEMS Inclinometer System, H-Level - Liquid Level Systems, Horizontal In Place Inclinometers, LT-Inclibus array, MD-Profile array, MEMS In-place Inclinometers, Mini OMNIAlog datalogger, OMNIAlog Datalogger, Tilt Beam (TB) sensors
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 […]
- H-Level - Liquid Level Systems, Multipoint settlement gauges
Sisgeo liquid is a de-aired water-glycole mix (70% – 30%). The freezing temperature is about -15°C.
- H-Level - Liquid Level Systems, Multipoint settlement gauges
