• Precision Measurement Technologies
  • Technology Center for

PICOSTRAIN PS021 Temperature Measurement

The K-factor of strain gages depends on temperature and decreases with higher temperature. If the temperature of the strain gage is known, it is easy to correct for the main failure (active temperature compensation).

PS021 offers the option of temperature measurement with an external temperature sensitive resistor.

General Circuit Features

Basically the temperature measurement is nothing more than a simplified SG measurement at separate ports. A measurement takes 2 discharge/recharge cycles and is done once per measurement sequence.

In the first cycle the capacitor is discharged through the temperature sensitive resistor. The nominal value of the resistance should be minimum 500 Ohm. In the second cycle the capacitor is discharged through a temperature stable reference resistor.

Schematic Diagram

(Click to enlarge)