Omron E5EK, User Manual

Page: 172 / 203

CHAPTER 7 CALIBRATION
E5EK
7--10
7.5 Calibrating Voltage Input
F
Preparation
AC100-240V
(AC/DC24V )
~
10
9
8
7
6
5
4
3
2
1
20
19
18
17
16
15
14
13
12
11
21 22
23
DMM
STV
+
--
SOURCE
•
In the above figure, STV refers to a standard DC current/voltage
source, and DMM refers to a precision digital multimeter. However,
note that the DMM is required only when the transfer output func-
tion is supported.
This example describes how to calibrate a platinum resistance ther-
mometer when the transfer output function is supported. If the transfer
output function is not supported, skips steps (4) to (7).
(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) Press the key. The display changes to [ ] (5 V calibration
display). Set the STV output to 5 V. 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. The display changes to [ ] (0 V calibration
display). Set the STV output to 0 V. When the value on the No.2
display has stabilized (changes of several digits max.), press the
key to temporarily store the calibration data.
(4) Next, calibrate the transfer output function. If the transfer output
function is not supported, skip to step (8). Press the key. The
display changes to [ ] (20 mA calibration display).
(5) 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”.
(6) Press the key. The display changes to [ ] (4 mA calibra-
tion display).
(7) 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”.
F
Calibration:
0 to 5V, 1 to 5V
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