Keithley 6517A Getting Started Guide

1-14 Front Panel Operation Model 6517A Getting Started Manual
Resistance measurements
NOTE Accurate high resistance measurements require the use of a low-leakage test fix-
ture, such as the Model 8002A.
The following procedure requires “BENCH” reset conditions. See “Bench defaults” to
reset the instrument.
1. With zero check enabled (“ZeroCheck” displayed), select the ohms function by
pressing R.
2. Select Auto V-Source ohms. In this mode, the V-Source is automatically set to a
voltage (nominally 40V or 400V) that optimizes measurement accuracy. See “Auto
V-Source” to select Auto V-Source ohms.
NOTE “BENCH” reset conditions selects Manual V-Source ohms. In this mode, you
must manually set the V-Source level for the measurement. See Section 2,
“Voltage Source,” for details on using the V-Source.
WARNING Selecting Auto V-Source ohms may set the V-Source to 400V.
3. Select a measurement range or use autoranging:
a. To automatically select the most sensitive range, enable autorange. The AUTO
key enables and disables autorange. When enabled, the AUTO annunciator is
on.
b. For manual ranging, use the RANGE  and  keys to select a measurement
range consistent with the expected resistance.
4. Connect the Model 6517A to the test fixture. Generic connections are shown in
Figure 1-5A. Note that this connection scheme requires that ammeter LO be inter-
nally connected to V-Source LO. See “Configuring V-Source” in Section 2 to con-
trol this internal LO-to-LO connection. If using the Model 8002A test fixture, refer
to Figure 1-5B.
NOTE For optimum accuracy, leakage currents in the test fixture can be cancelled by
performing REL on the current component of the measurement. To cancel leak-
age current, perform the procedure in “Amps Rel”.
5. Disable zero check by pressing Z-CHK and press OPER to source voltage to the
test fixture DUT.
6. Take a reading from the display.
7. Place the V-Source in standby when finished by again pressing OPER.
WARNING Place the V-Source in standby before making or breaking connections
to the test fixture or DUT.

Keithley 6517A Specifications

General

Brand	Keithley
Model	6517A
Category	Measuring Instruments
Language	English