5500A
Operator Manual
4-62
4-63. Testing the Thermometer
The following test should be conducted only after the thermometer has had time to
stabilize to an ambient temperature of 23°C ± 5°C (73°F ± 9°F).
1. Connect the Fluke 51 Thermometer to the calibrator using the appropriate
connection cable (Figure 4-19). The connection cable and miniconnector material
must match the thermocouple type. For example, if testing a K thermocouple, the
cable and miniconnector are for a K thermocouple.
!
60V
24V
MAX
OFFSET
ON/OFF
F/C
HOLD
K/J THERMOMETER
51
5500A
CALIBRATOR
20V PK
MAX
HI
LO
TC
TRIG
OUT
1000V
RMS
MAX
20V
RMS
MAX
1V PK
MAX
20V PK
MAX
NORMAL
AUX
SCOPE
V, ,
RTD
A, -SENSE,
AUX V
200V PK
MAX
Connection wiring must match thermocouple type, e.g., K, J, etc.
f4-19.eps
Figure 4-19. Cable Connections for Testing a 50 Series Thermometer
2. Verify that the EARTH indicator is on; if not, press Z as necessary.
3. Set up the calibrator by pressing 0 C E. Ensure the softkey labeled
OUTPUT indicates tc. If not, press the OUTPUT softkey until it does.
4. Select the thermocouple type and reference source by pressing the TC MENUS
softkey. Ensure the REF SRC softkey selection indicates “intrnl.” If not, press the
REF SRC softkey. Ensure the TYPE softkey indicates either J or K, depending on
which one the 51 is set to. Continue to press the TYPE softkey until the selected
thermocouple type is displayed.
5. Enter the calibrator settings listed in Table 4-7 and verify performance is within
specifications (see Section 1).
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