Testing Dc Voltage; Testing The Peak Min Max Function (Model 87 Only) - Fluke 87 III Series Service Information

80 Series III
Service Information
Step
1
2
3
4
5

Testing DC Voltage

To verify accuracy of the dc voltage function, do the following. (A separate performance
test procedure for mV dc is provided later in this section).
1. Connect the Calibrator to the Vand COM inputs on the Meter.
2. Turn the rotary switch to L.
3. Apply the input from step 1 of Table 7 for your model 80 Series III.
4. Compare the reading on the Meter display with the display reading in Table 7.
5. Repeat steps 3 and 4 for the remaining inputs shown in Table 7.
Step
1
2
3
4
5

Testing the PEAK MIN MAX Function (Model 87 only)

To check minimum/maximum (
1. Connect the Calibrator to the Vand COM inputs on the Meter.
2. Apply 2.0 V ac at 60 Hz (step 1, Table 8) from the Calibrator to the Vand
3. Turn the rotary switch to L (dc volts for dc-coupling of the input) or K (ac volts for
4. Press M.
5. Press the T(beeper) to enter the
18
Table 6. Frequency Counter Sensitivity and Trigger Level Tests
Range
4 V ac
4 V dc
4 V dc
40 V dc
40 V dc
If the display reading falls outside of the range shown in Table 7, the Meter does not
meet specification.
DC Input Voltage
3.500 V 3.495 to 3.505
35.00 V 34.95 to 35.05
-35.00 V -34.95 to -35.05
350.0 V 349.5 to 350.5
1000 V 998 to 1002
COM inputs of the Meter.
capacitive-coupling of the input).
The rms converter is not used in Peak mode. The digital display
represents the actual peak value of the input.
maximum values.
Amplitude (RMS) Frequency
300 mV ac
1.7 V ac
1.0 V ac
6.0 V ac
2.0 V ac
Table 7. DC Voltage Test
Display Reading
83 III
3.496 to 3.504
34.96 to 35.04
-34.96 to -35.04
349.6 to 350.4
998 to 1002
) feature of the Model 87.
MIN MAX
Note
PEAK MIN MAX
Display Reading
1 kHz 999.8 - 1000.2
1 kHz 999.8 - 1000.2
1 kHz 000.0
1 kHz 999.8 - 1000.2
1 kHz 000.0
85 III 87 III
3.497 to 3.503
34.97 to 35.03
-34.97 to -35.03
349.7 to 350.3
998 to 1002
mode and begin displaying