Omron E5EK, User Manual

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7.3 Calibrating Platinum Resistance Thermometers
E5EK
7--7
7.3 Calibrating Platinum Resistance Thermometers
F
Preparation
10
9
8
7
6
5
4
3
2
1
20
19
18
17
16
15
14
13
12
11
21 22
23
DMM
6-dial
AC100-240V
(AC/DC24V )
~
SOURCE
•
Use leads of the same thickness when connecting to the platinum
resistance thermometer.
•
In the above figure, 6-dial refers to a precision resistance box, and
DMM stands for a digital multimeter. However, note that the DMM is
required only when the transfer output function is supported.
•
Connect (short) the leads from terminal Nos.11 and 12.
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 (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
[ ] (300
Ω
calibration display). Set the 6-dial to 300
Ω
. 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
Ω
calibration display). Short
terminal No.11 to 13. 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 B-B’ input. Change the wiring as follows:
15
14
13
12
11
6-dial
Make the connection across terminal Nos.11 and 12 and the 6-dial
as short as possible. Short terminal Nos.11 and 13.
F
Calibration
Cont’d on next page
Change wiring.
Short terminal
Nos.11 to 13