E5CNH E5AN-H E5EN-H Digital Controllers User's Manual - OMRON

Checking Indication Accuracy Section 6-7
6-7 Checking Indication Accuracy
6-7-1 Thermocouple
6-7-2 Platinum Resistance Thermometer
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After calibrating the input, be sure to check the indication accuracy to
make sure that the calibration has been executed correctly.
Operate the E5@N-H in the process value/set point monitor mode.
Check the indication accuracy at the following three values: upper limit,
lower limit, and mid-point.
Preparations
The diagram below shows the required device connections. Make sure
that the E5CN/AN/EN-H and cold junction compensator are connected by
a compensating conductor for the thermocouple that is to be used during
actual operation.
9
Input power supply
10
1
Input power supply
2
E5CN-H
E5AN/EN-H
− 4
+ 5
− 19
+ 20
Cold junction compensator
Compensating conductor
Operation
Make sure that the cold junction compensator is at 0°C, and set the STV
output to the voltage equivalent of the starting power of the check value.
The cold junction compensator and compensation conductor are not
required when an external cold junction compensation method is used.
Preparations
The diagram below shows the required device connections.
9
Input power supply
10
1
Input power supply
2
E5CN-H
A 3
B' 4
B 5
E5AN/EN-H
A 18
B' 19
B 20
Operation
Set the 6-dial to the resistance equivalent to the check value.
STV
Cold junction compensator
Compensating conductor
6-dial
6-dial
STV