Dc Voltage Test; Ac Voltage Test; Resistance Test - Fluke 77 Series III Service Manual

77 Series III
Service Manual
Step
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4
5*
*300 mV function only

3-8. AC Voltage Test

Connect the ground/common/low side of the AC
calibrator to COM on the UUT.
1. Set the UUT function switch to VAC, and connect the AC Voltage
Calibrator to the
2. Set the AC Voltage Calibrator for the output given in Table 3-3,
verify that the UUT display reading is within the limits shown.
When the input is open in the VAC function, it is normal for
the meter to read some counts on the display. This is due to
ac pickup in the ac amplifier when the ac amplifier when the
ac amplifier is unterminated.
Step
1
2
3
4
3-9.

Resistance Test

1. Select the ohms function on the UUT.
2. Connect the Ohms Calibrator or Decade Resistor to the
COM input terminals of the UUT.
3-8
Table 3-2. DC Voltage Test
DC Input Voltage
+2.7V
+27V
+270V
+1000V
+300 mV
and COM input terminals.
Table 3-3. AC Voltage Test
Input
Voltage
2.7V
2.7V
1000V
1000V
Display Reading
2.691 to 2.709V DC
26.91 to 27.09V DC
269.1 to 270.9V DC
995 to 1005V DC
299.0 to 301.0V DC
Warning
Note
Frequency
100 Hz
500 Hz
100 Hz
1000 Hz
Display Reading
2.644 to 2.756V AC
2.644 to 2.756V AC
978 to 1022V AC
978 to 1022V AC
and