Inspecting Indicator Accuracy; Thermocouples; Resistance Thermometers - Omron E5AR-T User Manual

Section 9 User Calibration

9.7 Inspecting Indicator Accuracy

• After calibrating an input, always inspect the indicator accuracy to verify that the input was calibrated
correctly.
• Operate the E5AR-T/ER-T in the PV/SP state.
• Check the indicator at three points: the upper limit, lower limit, and mid-range limit of the indicator range.

■ Thermocouples

● Preparations
● Operation

■ Resistance Thermometers

● Preparations
● Operation
9-14
Connect the required devices as shown below. Be sure to connect
the E5AR-T/ER-T to the cold junction compensator using the
compensating leads that you intend to use for the thermocouple.
A
E5AR-T/ER-T
1
Input
power
2
supply
Make sure that the cold junction compensator is at 0°C, and set the
STV output to the voltage that is equivalent to the inspection value
startup power.
If the cold junction compensating system uses an external setting, a
cold junction compensator and compensating leads are not needed.
Connect the required devices as shown below.
A
1
Input power supply
2
Set the 6-dial resistance box to the resistance that is equivalent to
the inspection value.
Cold junction compensator
_
5
6
+
Compensating leads
E5AR-T/ER-T
A
4
B
5
resistance
B 6
STV
6-dial
box