Section 4: Basic measurements
Model 6517B Electrometer User's Manual
4-10
6517B-900-01 Rev. B August 2022
The published specifications for resistance only apply for the specified AUTO voltage source test
voltages. If you are using the MANUAL voltage source setting, you must add the voltage source
errors to the current measurement range errors to determine the total resistance errors.
When the voltage source setting is set to MANUAL, you can set the voltage source to any value and
change the voltage source range while using the resistance function. The 6517B displays the current
range that is used for the measurement and the voltage source value.
A hazardous voltage (400 V) may automatically be set for the resistance function when AUTO
voltage source is selected. See the table in
(on page 4-10) for the
resistance ranges that use the high voltage.
To set the voltage source:
1. Press the
CONFIG
key.
2. Press the
R
key.
3. Select
VSOURCE
. Press the
ENTER
key.
4. Select
AUTO
or
MANUAL
. Press the
ENTER
key.
Resistance ranges
The reading ranges for the resistance function are listed in the following table.
To optimize range selection:
•
Use autorange.
•
Select the next lower range when UNDERFLOW is displayed.
•
With the manual voltage source selected, press the
NEXT
key until the actual measured current
is displayed. This allows you to verify that the selected current range is the lowest range that can
handle the measured current.
Refer to “Measurement range” in the
Model 6517B Electrometer Reference Manual
for
additional detail.
Resistance reading ranges and automatic voltage source
Reading range
Automatic voltage source
Test voltage
Current range
200 kΩ to 2 MΩ
2 MΩ to 20 MΩ
20 MΩ to 200 MΩ
200 MΩ to 2 GΩ
2 GΩ to 20 GΩ
20
GΩ to 200 GΩ
200 GΩ to 2 TΩ
2 TΩ to 20 TΩ
20TΩ to 200TΩ
40 V
40 V
40 V
40 V
40 V
40 V
400 V
400 V
400 V
200 μA
20 μA
2 μA
200 nA
20 nA
2 nA
2 nA
200 pA
20 pA
