Calibrating Platinum Resistance Thermometers - Omron e5ck User Manual

7.3 Calibrating Platinum Resistance Thermometers

F Preparation
F Calibration
Short terminal
Nos.6 to 8
Change wiring.
Cont'd on next page
7.3 Calibrating Platinum Resistance Thermometers
~
AC100-240V
(AC/DC24V )
SOURCE
• Use leads of the same thickness when connecting to the platinum resis
tance 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.6 and 7.
This example describes how to calibrate a platinum resistance thermome
ter 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 ag
ing time when aging is required.
(2) First, calibrate the main input. Press the
(300Ω calibration display). Set the 6 dial to 300Ω. 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 [
terminal Nos.6 to 8. 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 B B' input. Change the wiring as follows:
~
AC100-240V
(AC/DC24V
SOURCE
Make the connection across terminal Nos.6 and 7 and the 6 dial as
short as possible. Short terminal Nos.6 and 8.
5 10
11 12
4 9
3 8
2
7
13 14
1 6
DMM
] (0Ω calibration display). Short
)
5 10
11 12
4 9
3 8
2
7
13 14
1 6
6-dial
key to display [ ]
key to temporarily
6-dial
7–7