Specifications

Calibration 9-2
This sequence will trim the output to +00900.00. Verify:
Command: $1RD
Response: *+00900.00
The module is calibrated.
Thermocouples: Disable the cold junction compensation by setting bit 4 in
byte 3 of the setup data with the SetUp (SU) command. The module may
now be calibrated using a known input voltage. Perform the calibration as
described for a voltage input module. Table 9.1 gives recommended
calibration points. Due to the nonlinear nature of thermocouples, it may be
necessary to repeat the TS command to obtain the desired output. After
calibration is complete, enable the cold junction compensation by clearing
bit 4 in byte 3 of the setup data.
RTD: Use a calibrated resistor mounted directly on the module connector to
avoid lead resistance errors. The resistor must be accurate to 0.01% for
proper calibration. Recommended calibration points are listed in Table 9.1.
Follow the command sequence described for voltage inputs to calibrate the
module. Due to the nonlinear nature of RTD’s it may be necessary to repeat
the TS command to obtain the desired output.