Testing The Ohms Function; Testing The Lo-Ohms Function - Fluke 79 III Calibration Information Manual

Testing the Ohms Function

1. Set the UUT to Ω (ohms).
2. Connect the ohms calibrator or decade resistor to the VΩG and COM input terminals of the UUT.
3. Referring to Table 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.
Step
1
Decades of 1:
2
3
4
5
6
7
Decades of 1.9:
2
3
4
5
6
7
Decades of 3.5:
2
3
4
5
6
7

Testing the Lo-Ohms Function

1. Switch the instrument function to the Lo-Ohm continuity position.
2. Place a short across the VΩG and COM input Terminals.
3. Push the RANGE button for 1 second to initiate Lo-Ohm calibration.
4. Push the RANGE button again to calibrate Lo-Ohms.
5. Apply 40 ohms to the VΩG and COM terminals and verify that the reading is within 38.00 Ω to
42.00 Ω.
Table 7. Resistance Test
Range Input Resistance
400 Ω
short
400 Ω 100 Ω
4 kΩ 1 kΩ
40 kΩ 10 kΩ
400 kΩ 100 kΩ
4 MΩ 1 MΩ
40 MΩ 10 MΩ
400 Ω 190 Ω
4 kΩ 1.9 kΩ
40 kΩ 19 kΩ
400 kΩ 190 kΩ
4 MΩ 1.9 MΩ
40 MΩ 19 MΩ
400 Ω 350 Ω
4 kΩ 3.5 kΩ
40 kΩ 35 kΩ
400 kΩ 350 kΩ
4 MΩ 3.5 MΩ
40 MΩ 35 MΩ
Series III Multimeter
Display Reading
0 to 0.2 Ω
99.4 to 100.6 Ω (plus 0 reading)
.995 to 1.005 kΩ
9.95 to 10.05 kΩ
99.3 to 100.7 kΩ
.995 to 1.005 MΩ
9.87 to 10.13 MΩ
189.0 to 191.0 Ω (plus 0 reading)
1.891 to 1.909 kΩ
18.91 to 19.09 kΩ
188.8 to 191.2 kΩ
1.891 to 1.909 MΩ
18.78 to 19.22 MΩ
348.4 to 351.6 Ω (plus 0 reading)
3.485 to 3.515 kΩ
34.85 to 35.15 kΩ
347.8 to 352.2 kΩ
3.485 to 3.515 MΩ
34.62 to 35.38 MΩ
Performance Tests
15