Fluke 51 Service Manual page 18

51, 52, 53, 54 Series II
Service Manual
3. The menu on the display changes to "
Within
4. Press K or N to select different menu options.
5. With
For steps 6 and 8, keep hand and body motion to a minimum while the
thermometer takes A/D readings.
6. Press E. Wait while it takes A/D readings.
7. When the thermometer prompts for "-8", set the Calibrator to -8.0000 mV. Allow the
8. Press E on the thermometer and wait while it takes A/D readings. The
9. If the measurement is from –7 995.0 to –8 005.0, press E and the meter will
10. Using K or N, select "
10
Figure 4. Calibration Button Access
are four menu options that may be accessed by pressing E:
CAL
CAL A-d prompts the operator for the A/D calibration inputs in mV dc.
CAL rEF allows the operator to calibrate the reference junction at a
known temperature.
CAL donE saves the new calibration constants in memory.
CAL Abrt ignores calibration changes (turning the thermometer off
while in will also ignore calibration changes).
CAL
selected, press E. The thermometer prompts "80". Set the
CAL A-d
calibrator to +80.000 mV and allow the output to stabilize.
output to stabilize.
thermometer now shows the measured value in the bottom portion of the display.
Millivolts appears on the left side and microvolts appears on the right side.
return to the calibration menu and display
7995.0 to –8005.0, press E once to return to the calibration menu. Using
K or N, select
CAL A-d
starting at step 5.
memory.
Calibration
button access
".
CAL A-d
Note
Note
CAL rEF
and try the A/D calibration procedure a second time
", then press E to store the calibration in
CAL donE
. If the measurement is outside –
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