IMC CANSAS - Measurement Technique; Measurement Modes; Bridge Modules; General Remarks

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Measurement modes 181

Measurement Technique

5.1 Measurement modes

5.1.1 Bridge modules

With the modules imc CANSAS-BRIDGE2, -DCB8, -UNI8, imc µ-CANSAS-B1 or imc µ-CANSAS-B4 a bridge

measurement can be carried out.

5.1.1.1 General remarks

Bridge channels are for taking readings from measurement bridges such as resistor bridges or strain

gauges. The channels are equipped as non-isolated differential amplifiers and can alternatively be used

for direct measurement of voltages.

There is a distinction among the following operating modes:

1. Target: Sensor

Full bridge

Half bridge

Quarter bridge (120 )

1. Target: Strain gauge

Full bridge with 4 active strain gauges in uniaxial direction

Full bridge with Poisson strain gauge in adjacent bridge arms

Full bridge with Poisson strain gauge in opposing bridge arms

Half bridge with one active and one passive strain gauge

Half bridge with 2 active strain gauges in uniaxial direction

Poisson half bridge

Quarter bridge with 120 strain gauge

Note

The following discussion, whenever it is in reference to terminal connections, circuitry etc.,

pertains only to the imc CANSAS-BRIDGE2 module, and only the most general remarks on bridge

measurement are applicable for bridge measurement systems besides UNI8 and DCB8. Such

generalized topics include instrument sensitivity and strain gauge properties.

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