Omron E5AK User Manual page 136

CHAPTER 7 CALIBRATION
F Calibration:
thermocouple 2
7--6
This example describes how to calibrate a thermocouple when the
transfer output function is supported. If the transfer output function is
not supported, skips steps (7) to (10).
(1) When [ ] is displayed, the 30-minute timer is displayed on the
No.2 display and counts down. This timer serves as a guide for the
aging time when aging is required.
(2) First, calibrate the main input. Press the
[ ] (20mV calibration display). Set STV output to 20mV . When
the value on the No.2 display has stabilized (changes of several dig-
its max.), press the
data.
(3) Press the key to display [
STV output to 0mV . When the value on the No.2 display has stabi-
lized (changes of several digits max.), press the
rarily save the calibration data.
(4) Next, calibrate the cold junction compensator. Press the
display [ ] (310mV calibration display). Set STV output to
310mV . When the value on the No.2 display has stabilized (changes
of several digits max.), press the
calibration data.
(5) Press the key to display [
STV output to 0mV . When the value on the No.2 display has stabi-
lized (changes of several digits max.), press the
rarily save the calibration data.
(6) Finally, calibrate the bias compensation value. Disconnect the STV ,
and enable the thermocouple of the cold junction compensator.
When carrying this out, make sure that the wiring on the STV is
disconnected.
Make sure that the cold junction compensator is set to 0_C and
press the key. The display changes to [
play for the bias compensation value). When the value on the No.2
display has stabilized (changes of several digits max.), press the
key to temporarily save the calibration data.
(7) Next, calibrate the transfer output function. If the transfer output
function is not supported, skip to step (11). Press the
display changes to [
(8) Set the output to 20mA by the
the voltage on the digital multimeter. In the example on the left,
the display indicates that the value two digits smaller than before
calibration is "20mA".
(9) Press the key. The display changes to [
display).
(10) Set the output to 4mA by the
voltage on the digital multimeter. In the example on the left, the
display indicates that the value two digits smaller than before cal-
ibration is "4mA".
(11) Press the key until the display changes to the data save dis-
play. Press the
two seconds later the calibration data is saved to internal memory.
If you press the
calibration data is invalidated.
(12) This completes calibration of the thermocouple 2 group. Press the
key to return the display to [
key to temporarily save the calibration
] (0mV calibration display). Set
key to temporarily save the
] (0mV calibration display). Set
] (20mA calibration display).
or
or keys while monitoring the
key. The No.2 display changes to [
key when the No.2 display reads [
].
key to display
key to tempo-
key to
key to tempo-
] (calibration dis-
key. The
keys while monitoring
] (4mA calibration
], and
], the