4.5 Calibration
E5CK
4--15
J
Calibrating platinum resistance thermometer
F
Preparation
5
4
3
2
1
10
9
8
7
6
13 14
11 12
6-dial
DMM
SOURCE
AC100-240V
(AC/DC24V )
•
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
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 switch [
] (0
Ω
calibration) display. Short
terminal No.6 to 8. 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 B-B’ input. Change the wiring as follows.
10
9
8
7
6
6-dial
Make the connection across terminals 6 and 7 and the 6-dial as short
as possible. Short terminals 6 and 8.
(5) Press the
key to display [
] (10
Ω
calibration display). Set the
6-dial to 10
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.
(6) Press the
key to display [
] (0
Ω
calibration display). Set the
6-dial to 10
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.
F
Calibration
Cont’d on next page
Change wiring.
Short terminal
Nos.6 to 8
Short terminal
Nos.6 to 8
