Section 16: Verification procedure
Model 6517B Electrometer Reference Manual
16-14
6517B-901-01 Rev. C / August 2015
2 M
Ω
to 200 M
Ω
range verification
1. Connect the Model 6517B to the resistance calibrator, as shown in the figure below.
2. Turn on the Model 6517B and the calibrator, and allow a one-hour warm-up period before making
measurements.
3. Restore Model 6517B factory default conditions, as explained in
Considerations
(on page 16-3).
4. Select the ohms function by pressing R.
5. Select the Model 6517B 2M
Ω
range, and make sure the filter is enabled.
6. Set the calibrator resistance to a nominal 1.9M
Ω
resistance value.
7. Place the voltage source in operate.
8. Make sure zero check is disabled, and allow the reading to settle. Verify that the displayed ohms
reading is within limits for the selected range listed in the table below.
9. Repeat steps 5 through 8 for the 20M
Ω
and 200M
Ω
ranges.
10. Turn off the Model 6517B voltage source, then disconnect the resistance calibrator from the
Model 6517B.
Figure 139: Connections for ohms verification - 2 M
Ω
to 200 M
Ω
range
Model 6517B range
Nominal resistance
1
Reading
limits
2
(1 year, 18 °C – 28 °C)
2 M
Ω
1.9
M
Ω
___________ to __________ M
Ω
20 M
Ω
19
M
Ω
___________ to __________ M
Ω
200 M
Ω
100
M
Ω
___________ to __________ M
Ω
2 G
Ω
1
G
Ω
___________ to __________ G
Ω
20 G
Ω
10
G
Ω
___________ to __________ G
Ω
200 G
Ω
100
G
Ω
___________ to __________ G
Ω
2 T
Ω
1
T
Ω
___________ to __________ T
Ω
20 T
Ω
10
T
Ω
___________ to __________ T
Ω
200 T
Ω
100
T
Ω
___________ to __________ T
Ω
1
Resistance calibrator used for 2M
Ω
to 200 M
Ω
ranges. Characterized resistance standards used for
200 G
Ω
to 200 T
Ω
ranges. Standards must be characterized to uncertainty at least four times better
than equivalent Model 6517B specifications and mounted in shielded test box (refer to the "Shielded
fixture construction" figure in the following).
2
Reading limits calculated from actual resistance value and Model 6517B specifications. See text.
