Calibrating the RTD Input
This RTD calibration procedure requires a 0 to 1000 ohm Decade
Resistance box to calibrate this analog input circuit. Once the circuit is
calibrated, either a 100 ohm RTD or a 1000 ohm RTD can be selected for
operation.
1. Put a jumper on pins 1 and 2 of JMP1 on the main PC board to select the RTD input
type.
2. Connect the Decade Resistance Box to pins 1 and 2 on the J5 connector on the main
PC board.
3. Select the “LOCalJR1k(10R)” parameter.
4. Set the decade resistance box low calibration value to 10 Ohm. Use the Up and Down
buttons to change the value on the display to 10.0.
5. Press the Enter button to save the value.
6. Select the “HICalR1K(2K1)” parameter.
7. Set the decade resistance box high calibration value to 2100 Ohm. Use the Up and
Down buttons to change the value on the display to 2100.0.
8. Press the Enter button to save the value.
9. Cycle between the Low and High parameters and readjust the values if needed to
compensate for any interaction that may occur between the two parameters.
Calibrating the Analog Input (V)
This analog input calibration procedure uses a Voltage source for this
analog input circuit. Once the circuit is calibrated, the JMP4 jumper can
be changed for a Milliamp or Voltage input source for operation.
1. Put a jumper on pins 2 and 3 of JMP4 on the main PC board to select a Voltage input
source.
2. Connect the voltage calibration source to pins 7 (+) and 8 (-) on the J5 connector on
the main PC board.
3. Select the “LOCalRSp(0.1V)” parameter.
4. Set the voltage low calibration source to 0.1V. Use the Up and Down buttons to
change the value on the display to 0.100.
5. Press the Enter button to save the value.
6. Select the “HICalRSp(9.9)” parameter.
7. Set the voltage high calibration source to 9.9V. Use the Up and Down buttons to
change the value on the display to 9.900.
8. Press the Enter button to save the value.
9. Cycle between the Low and High parameters and readjust the values if needed to
compensate for any interaction that may occur between the two parameters.
