Lower Display Thermocouple Measurement Tests - Fluke 724 Calibration Manual

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Calibration Manual

Lower Display Thermocouple Measurement Tests

1. Remove the test leads from the UUT terminals; then connect a type J thermocouple
2. Press T on the UUT until J appears on the lower display. If necessary, press D
3. Set the 5520A to output the type J thermocouple voltages shown in Table 14 and
4. Press STBY on the 5520A.
Warning
30 V maximum to
SOURCE / MEASURE
mA +
3W
mA -
4W
5520A Settings (referenced to 0 °C)
26
lead between the TC jack on the UUT and the TC jack on the 5520A, as shown in
Figure 10.
so the temperature is displayed in °C.
verify the UUT temperature readings are within the limits shown (values use the
ITS-90 curves).
30V MAX ALL TERMINALS
MEASURE
V V
TC
mA
Hz
RTD
LOOP
TC
COM COM
UUT
Figure 10. Lower Display Thermocouple Test Connections
Table 14. Type J Thermocouple Readings
-180.0 °C (-7.403 mV)
0.0 °C (0.000 mV)
750.0 °C (42.281 mV)
NORMAL
V, , ,RTD
A, -SENSE, AUX V
HI
1000V
1V PK
RMS
MAX
MAX
LO
20V
RMS
MAX
GUARD
20V PK MAX
TC Miniplug
5520A
UUT Readings
-179.0 °C to -181.0 °C
-0.7 °C to +0.7 °C
749.3 °C to 750.7 °C
AUX SCOPE
OUT
20V
RMS
MAX
150V
PK
MAX
TRIG
20V
PK
SHELLS
20A
NOT MAX
GROUNDED
TC 20V PK MAX
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