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
-
displayed controller temperature
5. Enter Factory Service Operations Module (9-FS).
Display
Parameter
Description/Comments
CJC
Cold Junction
Temperature
Observe the indicated cold junction
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
Description/Comments
Rtd1
Connect 0.0 ohm (jumper wire)
Wait 10 seconds, press P.
Rtd2
Connect 277.0 ohm
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
External Meter
Action
C 0V
0 V Calibration
0.00
Adjust if necessary, press P.
C 10V
10 V Calibration
10.00
Adjust if necessary, press P.
C 0c
0 mA Calibration
0.00
Adjust if necessary, press P.
C 20c
20 mA Calibration
20.00
Adjust if necessary, press P.
Remote Setpoint Calibration
Connect DC mA source with an accuracy of 0.03% or better.
Display
Action
Description/Comments
StP1
Apply 0 mA
Wait 10 seconds, press P.
StP2
Apply 5 mA
Wait 10 seconds, press P.
StP3
Apply 10 mA
Wait 10 seconds, press P.
StP4
Apply 15 mA
Wait 10 seconds, press P.
StP5
Apply 20 mA
Wait 10 seconds, press P.
-69-
Содержание CN63100 Series
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