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Section 4: Basic measurements
Resistance measurements
The Model 6517B can make resistance measurements up to 1017 Ω using the force voltage measure
current (FVMI) technique. From the known sourced voltage and measured current, the Model 6517B
calculates and displays the resultant resistance (R = V/I). The V-source level can be set automatically
by the Model 6517B or it can be manually set by the user.
The following procedure summarizes the basic steps to measure resistance. To ensure proper
operation, always enable zero check ("ZeroCheck" displayed) before changing functions (V, I, R, or
Q). The Z-CHK key controls zero check.
Hazardous voltages may be present on the output and guard terminals. To prevent
electrical shock that could cause injury or death, NEVER make or break connections to the
Model 6517B while the output is on. Power off the equipment from the front panel or
disconnect the main power cord from the rear of the Model 6517B before handling cables
connected to the outputs. Putting the equipment in standby mode does not guarantee that
the outputs are not powered if a hardware or software fault occurs.
1. Enable zero check by pressing Z-CHK.
2. Select RESISTANCE from the MEAS-TYPE selection of the ohms configuration menu. The ohms
configuration menu is accessed by pressing CONFIG and then R. This step can be skipped if the
instrument is already in the resistance measurement mode.
3. Select the V-source adjustment mode. With AUTO V-source selected, the instrument
automatically selects the optimum V-source value (40 V or 400 V) for the measurement range.
With MANUAL V-source selected, you select the V-source range and value. The V-source
adjustment mode is selected from the VSOURCE item of the CONFIGURE OHMS menu.
4. Connect the resistance to be measured to the Model 6517B, as shown in the following figure.
4-20
Figure 43: Typical connections for resistance measurements
Model 6517B Electrometer Reference Manual
6517B-901-01 Rev. C / August 2015
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