Omron E5CK User Manual page 53

CHAPTER 4 APPLIED OPERATION
F Calibration:
thermocouple 2
4--14
This example describes how to calibrate a thermocouple when the transfer
output function is supported. If the transfer output function is not sup-
ported, 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 digits max.),
press the key to temporarily save the calibration data.
(3) Press the key to display [
STV output to 0mV . When the value on the No.2 display has stabilized
(changes of several digits max.), press the
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
tion data.
(5) Press the key to display [
STV output to 0mV . When the value on the No.2 display has stabilized
(changes of several digits max.), press the
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 discon-
nected.
Make sure that the cold junction compensator is set to 0_C and press
the key. The display changes to [
the bias compensation value). When the value on the No.2 display has
stabilized (changes of several digits max.), press the
rarily 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
play changes to [
(8) Set the output to 20mA by the
voltage on the digital multimeter. In the example on the left, the dis-
play indicates that the value two digits smaller than before calibra-
tion 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 dis-
play indicates that the value two digits smaller than before calibra-
tion is "4mA".
(11) Press the key until the display changes to the data save display.
Press the key. The No.2 display changes to [
seconds later the calibration data is saved to internal memory. If you
press the key when the No.2 display reads [
data is invalidated.
(12) This completes calibration of the thermocouple 2 group. Press the
key to return the display to [
] (0mV calibration display). Set
key to temporarily save the calibra-
] (0mV calibration display). Set
] (calibration display for
] (20mA calibration display).
or keys while monitoring the
or keys while monitoring the
].
key to display [ ]
key to temporarily save
key to
key to temporarily save
key to tempo-
key. The dis-
] (4mA calibration
], and two
], the calibration