Thermocouple Cold Junction Calibration (Cjc); Rtd Ohms Calibration (Rtd); Main Or Second Linear Dc Analog Output Calibration; Remote Setpoint Calibration - Omega CN63100 Series User Manual

Thermocouple Cold Junction Calibration (CJC)

This procedure must be performed AFTER an accurate mV calibration.
1. Exit Factory Service Operations (press D) and return to Normal Display
Mode.
2. Connect a thermocouple probe of known accuracy to the controller (Types
T, E, J, K, and N only). Select the probe type used in Configure Module 1.
3. Connect a reference temperature probe to the measuring end of the
CN63100 thermocouple probe. The two probes should be shielded from air
movement and allowed sufficient time to equalize in temperature. (As an
alternative, the CN63100 thermocouple probe may be placed in a
calibration bath of known temperature.)
4. Compare controller display with reference temperature probe (or
calibration bath). If the displayed controller temperature does not equal the
reference probe temperature, calculate the CJ Error as follows:
=
CJ Error reference probe temperature
5. Enter Factory Service Operations Module (9-FS).
Display Parameter
CJC Cold Junction Observe the indicated cold junction
Temperature temperature. Add the calculated CJ Error to
the displayed value. Enter the sum as the new
value for CJC. Exit 9-FS and repeat step 4.
Note: If the initial value for CJC is not within
the range 15.0°C to 40.0°C, enter 25.0°C for
CJC and repeat the Cold Junction Calibration
procedure.

RTD Ohms Calibration (rtd)

This procedure must be performed AFTER an accurate mV calibration.
Connect one leg of precision resistance (accuracy of 0.1 ohm) to terminals #9
and #10 together, and the other leg to #8.
Display Action
Rtd1 Connect 0.0 ohm (jumper wire)
Rtd2 Connect 277.0 ohm
-
displayed controller temperature
Description/Comments
Description/Comments
Wait 10 seconds, press P.
Wait 10 seconds, press P.

Main or Second Linear DC Analog Output Calibration

1. Set the Linear DC Output jumper for the range to be calibrated. (See Linear
DC Analog Output Jumper Selection, page 11).
2. Connect a meter with an accuracy of 0.05% or better to the output.
3. For each step, use the controller arrow keys to adjust the external meter
display to match the parameter being calibrated. Press P when the output
is correct, or if the parameter is not being calibrated.
Display Parameter
C 0V 0 V Calibration
C 10V 10 V Calibration
C 0c 0 mA Calibration
C 20c 20 mA Calibration

Remote Setpoint Calibration

Connect DC mA source with an accuracy of 0.03% or better.
Display Action
StP1 Apply 0 mA
StP2 Apply 5 mA
StP3 Apply 10 mA
StP4 Apply 15 mA
StP5 Apply 20 mA
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External Meter Action
0.00 Adjust if necessary, press P.
10.00 Adjust if necessary, press P.
0.00 Adjust if necessary, press P.
20.00 Adjust if necessary, press P.
Description/Comments
Wait 10 seconds, press P.
Wait 10 seconds, press P.
Wait 10 seconds, press P.
Wait 10 seconds, press P.
Wait 10 seconds, press P.