Calibrating Current Input - Omron E5EK PROGRAMMABLE TYPE User Manual

7.4 Calibrating Current Input

F Preparation
F Calibration
~
AC100-240V
(AC/DC24V
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 [
tion display). Set the STV output to 20 mA. 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 [
tion display). Set the STV output to 0 mA. 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
display changes to [
(5) 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".
(6) Press the key. The display changes to [
tion display).
(7) 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".
(8) Press the key until the display changes to the data store dis-
play.
Press the key. The No.2 display changes to [
seconds later the calibration data is stored to internal memory. If
you press the
ibration data is disabled.
(9) This completes calibration of the current input. Press the
to return the display to [
7.4 Calibrating Current Input
)
10 20 DMM
21 22
9 19
8 18
7 17
6 16
5 15
4 14
3 13
--
2 12
23
1 11
+
STV
] (20 mA calibration display).
or
or
key when the No.2 display reads [
].
] (20 mA calibra-
] (0 mA calibra-
key. The
keys while monitoring
] (4 mA calibra-
keys while monitoring
], and two
], the cal-
key
7--9