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Maintaining the Calibrator
Performance Tests
6
6-9
Testing Thermocouple Input
For this test the CJC (cold junction compensation) must be turned off and the leads
and mini-connector must be copper and copper. Press
I
5
to turn off the CJC.
XCJC on the display indicates that the CJU is turned off. The mini-connector will
have the designation “Cu” for copper and copper. Connect the mini-connector to
the front of the 525A TC input/output connector and the other end to the 5520A
DC voltage output. See Figure 6-5. Output the simulated thermocouple
temperatures listed in Table 6-4.
525A
5520A Normal Output
4W Ohms
Function
INPUT
OUTPUT
HI
VOLTS
mA
RTD
HI
LO
HI
LO
LO
TC
SENSE
INPUT/OUTPUT
4W RTD
SET
RECALL
LOCAL
EXP
AUTOSET
INPUT
OUTPUT
ZERO
RNG LOCK
C / F
CJC
SETUP
20V PK
MAX
100V MAX
100mA MAX
20V PK
MAX
20V PK
MAX
525A
TEMPERATURE / PRESSURE CALIBRATOR
0
•
1
2
3
4
5
6
7
8
9
/
VOLTS
mA
TYPE
UNITS
TC
RTD
SHIFT
ENTER
STBY
OPR
CE
ajr24f.eps
Figure 6-5. Connections for Measuring TC Input
Содержание 525A
Страница 8: ...525A Users Manual vi ...