CWR1 (Input 2) requires a single point field calibration. A 10,000 ohms ±100ppm reference resistor is connected to the input through the field wiring.
|
Step |
Action |
Recorded Result |
|---|---|---|
|
Connect reference resistance to the input of the TE-74, record reference resistance value. |
Record Reference Resistance |
10,000.0 ohms |
|
Allow input to settle, record present value of the input resistance. |
Record present value of CWR1-R |
10,004.5 ohms |
|
Subtract the recorded present value from the reference resistance value, command field Zero Reference to the difference. |
Command CWR1-Zero Reference to difference of CWR1-R present value and reference resistance |
10,000 ohms - 10004.5 ohms = -4.5 ohms |