Omron e5ck User Manual page 152

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 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 ag
ing 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 several digits max.),
press the key to temporarily store the calibration data.
(3) Press the key to display [
STV output to 0 mV . When the value on the No.2 display has stabilized
(changes of several digits max.), press the
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 sev
eral digits max.), press the
tion data.
(5) Press the key to display [
STV output to 0 mV . When the value on the No.2 display has stabilized
(changes of several digits max.), press the
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 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 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
play changes to [
(8) Set the output to 20 mA 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 20 mA".
(9) Press the key. The display changes to [
display).
(10) Set the output to 4 mA 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 4 mA".
(11) Press the key until the display changes to the data store display.
Press the key. The No.2 display changes to [
conds later the calibration data is stored to internal memory. If you
press the key when the No.2 display reads [
data is disabled.
(12) This completes calibration of the thermocouple 2 group. Press the
key to return the display to [
] (0 mV calibration display). Set
key to temporarily store the calibra
] (0 mV calibration display). Set
] (calibration display for
] (20 mA calibration display).
or keys while monitoring the
or keys while monitoring the
].
key to display [ ]
key to temporarily
key to
key to temporarily
key to tempo
key. The dis
] (4 mA calibration
], and two se
], the calibration