Omron E5AK PROGRAMMABLE TYPE User Manual page 168

CHAPTER 7 CALIBRATION
F Calibration: ther-
mocouple 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
[ ] (20 mV calibration display). Set STV output to 20 mV .
When the value on the No.2 display has stabilized (changes of sev-
eral digits max.), press the
tion data.
(3) Press the key to display [
STV output to 0 mV . When the value on the No.2 display has stabi-
lized (changes of several digits max.), press the
rarily store the calibration data.
(4) Next, calibrate the cold junction compensator. Press the
display [ ] (310 mV calibration display). Set STV output to 310
mV . When the value on the No.2 display has stabilized (changes of
several digits max.), press the
ibration data.
(5) Press the key to display [
STV output to 0 mV . When the value on the No.2 display has stabi-
lized (changes of several digits max.), press the
rarily store 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 store 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 20 mA 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 "20 mA".
(9) Press the key. The display changes to [
tion display).
(10) Set the output to 4 mA 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 "4 mA".
(11) Press the key until the display changes to the data store dis-
play. Press the
seconds later the calibration data is stored to internal memory. If
you press the
ibration data is disabled.
(12) This completes calibration of the thermocouple 2 group. Press the
key to return the display to [
key to temporarily store the calibra-
] (0 mV calibration display). Set
key to temporarily store the cal-
] (0 mV calibration display). Set
] (20 mA calibration display).
or
or
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
] (4 mA calibra-
keys while monitoring
], and two
], the cal-