Fluke 8846A - 2 X4 Test Lead Verification Steps; Rear Panel Terminal Verification Steps

8845A/8846A
Calibration Manual
3-16
Table 3-10. 8845A 2-Wire Ohms Verification Steps (cont.)
90-day Test Limits
[1]
1-year Test Limits
[1]
Nominal
Input
Range
High Low High Low
100.000 kΩ 100000 100.0090 kΩ 99.9910 kΩ 100.0110 kΩ 99.9890 kΩ
0 Ω 1000000 10.00000 Ω 0 Ω 10.00000 Ω 0 Ω
1.00000 MΩ
[2]
1000000 1.000090 MΩ 0.999910 MΩ 1.000110 MΩ 0.999890 MΩ
0
[1]
10000000 100.0000 Ω 0 Ω 100.0000 Ω 0 Ω
10.0000 MΩ
[2]
10000000 10.002100 MΩ 9.997900 MΩ 10.004100 MΩ 9.995900 MΩ
0 100000000 10000.00 Ω 0 Ω 10000.00 Ω 0 Ω
100.0000 MΩ 100000000 100.8100 MΩ 99.19000 MΩ 100.8100 MΩ 99.19000 MΩ
[1] Zero Meter before each measurement.
[2]
5520A must be used with 8508A to obtain suitable test uncertainty ratio.
[3] Optional test.
2X4 Test Lead Verification Steps
This optional test verifies Meter operation with the TL2X4W-PT 2X4-Wire Test Leads.
To verify 2X4 Test Lead performance:
1. Plug the TL2X4W-PT 2X4-Wire Test Leads into the HI and LO terminals of the
Meter (correct orientation is with the bump down)
2. Press N.
3. If not already highlighted, press the 2X4WIRE soft key.
4. Connect the probe tips together to get the lowest reading.
The Meter should read under 3 milliohms. If the Meter reads above 3 milliohms, clean
off the probes with a damp cloth and repeat step 4 above.
Note
If the leads are damaged, replace them.
Rear Panel Terminal Verification Steps
This optional test verifies Meter operation through the rear-panel input terminals.
After connecting the Meter to the test equipment as shown in Figure 3-5, apply the
nominal values listed in Table 3-11 or Table 3-12, depending on which meter you are
calibrating.