YOKOGAWA YewSeries 80 STED Style S, User Manual

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6-8
IM 01B04J01-02E
6.4 Check of Reference Junction Temperature
Compensation Action
For thermocouple input, check the action of reference junction temperature compesation
using the cold junction bottle. The figure of connection is shown in Figure 6-6.
When using the cold junction bottle, install the reference junction block (RJC), then
replace the terminal cover and warm up the instrument for about 15 minutes.
DC Voltage/Current
Standard
Cold Junction Bottle
Yokogawa GS200 or the equivalent
Power Supply
r
Reference Junction Block
r: Resistance equivalent to that of
the actual lead wire.
Copper Wire
Thermocouple element or
compensating lead wire
Digital Voltmeter
Yokogawa DM7560 or the equivalent
Digital Voltmeter
250
Ω ±
0.05%
Note: The broken line shows
4 to 20 mA DC output
test circuit.
METER COUPLE
C F
H D B
A
J K
SPAN
ZERO
1 3 5
6 4 2
7
+ – + –
+
–
+
–
+
+
–
–
F0606.ai
Figure 6-6 Thermocouple Input Converter
(Using reference junction compensator)