Ohms Test; Continuity Test - Fluke 78 Service Manual

3-19. Ohms Test

1. Set the Fluke 78 rotary switch to the e function.
2. Connect the Ohms Calibrator or Decade Resistor to the z and COM input
terminals of the meter.
3. Referring to Table 3-7, set the Decade Resistor or Ohms Calibrator to the resistance
value indicated in steps 1 through 7. Verify that the display reading is within the
limits shown in the table.
Step
400 J
1
Decades of 1:
400 J
2
3 4 kJ
4 40 kJ
5 400 kJ
6 4 MJ
7 40 MJ
Decades of 1.9:
400 J
2
3 4 kJ
4 40 kJ
5 400 kJ
6 4 MJ
7 40 MJ
Decades of 3.5:
400 J
2
3 4 kJ
4 40 kJ
5 400 kJ
6 4 MJ
7 40 MJ

3-20. Continuity Test

1. Set the Fluke 78 rotary switch to w and press the pushbutton for 2 seconds to put
the meter in the continuity test function.
2. Referring to Table 3-8, apply inputs as indicated. Verify that the Fluke 78 display
and beeper indicate as shown in the table.
Step
1
2
Table 3-7. Resistance Test
Range Input
Resistance
short
100 J
1 kJ
10 kJ
100 kJ
1 MJ
10 MJ
190 J
1.9 kJ
19 kJ
190 kJ
1.9 MJ
19 MJ
350 J
3.5 kJ
35 kJ
350 kJ
3.5 MJ
35 MJ
Table 3-8. Continuity Test
Range
400 J
400 J
Display Reading
000.0 to 000.2 J
99.3 to 100.7 J (plus 0 reading)
.994 to 1.006 kJ
9.94 to 10.06 kJ
99.4 to 100.6 kJ
.994 to 1.006 MJ
9.87 to 10.13 MJ
188.8 to 191.2 J(plus 0 reading)
1.889 to 1.911 kJ
18.89 to 19.11 kJ
188.9 to 191.1 kJ
1.889 to 1.911 MJ
18.78 to 19.22 MJ
348.0 to 352.0 J (plus 0
reading)
3.481 to 3.519 kJ
34.81 to 35.19 kJ
348.1 to 351.9 kJ
3.481 to 3.519 MJ
34.62 to 35.38 MJ
Input Display Reading
open
30 J
Maintenance
Performance Tests
OL
tone
3
3-11