Connecting Strain Gauge Sensing Elements

to ZET-017-T8 Strain Gauge Module

This section describes the layouts of resistive strain sensor connection to ZET 017-T8 strain gauge module and issues of measurements using ZETLAB TENZO software supplied with strain gauge modules.

ZET 017-T8 strain gauge module has miniXLR 92M-502 input channels and is supplied with cables for connection of strain gauge sensing elements and resistive strain sensors for each channel.

Input Channel Connector of Strain Gauge Module Cable Terminals
Input – IN –
Input + IN +
Generator GEN
Ground GND
TEDS Autodetect
Разъём входных каналов тензостанции

Strain Gauge Module inputs

Input- and Input+ contact points form the differential input of the strain gauge module, which receives the signal from sensor (strain gauge bridge).

Generator contact point is designed for supplying the power to sensor from a built-in generator of strain gauge module. The generator is controlled via Signal Generator software, and the signal is fed to all channels of strain gauge module.
Note: The generator also has a BNC output on the rear panel of strain gauge module.

Measurements are performed via Strain Gauge software. Each channel runs a separate instance of the software facility. You can run multiple instances for one measuring channel and adjust them for measurement of various parameters according to the relevant calibration tables. All settings are made in the Options window of Strain Gauge program. Additionally in the Device Manager program the signal conversion frequency for strain gauge module is set, specifying the names of measuring channels.

The signal at the strain gauge sensor output is proportional to the supplied power and applied load, so to obtain the measured values, it is necessary to carry out relative measurements, i.e. take into account the circuit power. To do this, the virtual channel of the generator or the input channel of strain gauge module can be used .

The Strain Gauge program not only displays the current measured value, but also creates a virtual channel available for display on a multi-channel oscillograph, signal parameter recorder, and in other ZETLAB TENZO software facilities.

Layouts of Resistive Strain Sensor Connection to Strain Gauge Module

The below figures show examples of  resistive strain sensor connection to strain gauge module via four- and six-wire circuits.

Bridge Circuit

Bridge connection circuit for resistive strain sensors (full bridge). One input channel is used for connection to strain gauge module (four-wire connection circuit). Measurements are relative to the virtual channel of the generator.

Мостовая схема, 4-х проводное подключение к тензостанции

 Bridge circuit, 4-wire connection to strain gauge module

Bridge connection circuit for resistive strain sensors (full bridge). Two input channels are used for connection to strain gauge module: measuring and reference. Measurements are relative to the reference channel.

Тензомост, 6-ти проводная схема подключения к тензостанции

Bridge circuit, 6-wire connection to strain gauge module

Connection of multiple strain gauge bridges to strain gauge module via one reference channel is used when distances between the measuring points are short.

Подключение нескольких тензомостов к тензостанции с одним опорным каналом

Connection of multiple strain gauge bridges to strain gauge module via one reference channel

Half-Bridge Circuit

Connection of the half-bridge circuit to the strain gauge module requires resistive strain sensors with low temperature coefficient of resistance (TCR) for supplementing the circuit to complete the bridge.

Подключение полумостовой схемы к тензостанции

R1 — temperature compensation; R2 — measuring; R3, R4 — constants with low TCR; R1≈R2≈R3≈R4