7.2 Calibrating Thermocouples
E5EK
7--5
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
key to display [
]
(50 mV calibration display). Set STV output to 50 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 [
] (0 mV calibration display). Set
STV output to 0 mV. When the value on the No.2 display has stabi-
lized (changes of several digits max.), press the [
] key to tempo-
rarily store the calibration data.
(4) Next, calibrate the cold junction compensator. Press the
key to
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
key to temporarily store the cal-
ibration data.
(5) Press the [
] key to display [
] (0 mV calibration display).
Set STV output to 0 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.
(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 [
] (calibration dis-
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
key. The
display changes to [
] (20 mA calibration display).
(8) Set the output to 20 mA by the
or
keys while monitoring
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 [
] (4 mA calibra-
tion display).
(10) Set the output to 4 mA by the
or
keys while monitoring
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 date save display.
Press the
key. The No.2 display changes to [
], and two se-
conds later the calibration data is stored to internal memory. If you
press the
key when the No.2 display reads [
], the calibra-
tion data is disabled.
(12) This completes calibration of the thermocouple 1 group. Press the
key to return the display to [
].
F
Calibration:
thermocouple 1
Summary of Contents for E5EK
Page 1: ...User s Manual Cat No H089 E1 02 Digital Controller Programmable Type...
Page 24: ...CHAPTER 1 INTRODUCTION 1 14...
Page 36: ...CHAPTER 2 PREPARATIONS 2 12...
Page 162: ...CHAPTER 6 USING THE COMMUNICATIONS FUNCTION 6 20...
Page 176: ...CHAPTER 7 CALIBRATION 7 14...
Page 193: ...SETTING LIST A 11...
