Keithley 263 User Manual

OPERATION
3.7.3 Guarded Volts
load. The preamplifier has a Xl gain, thus the voltage
potential at I’REAMP OUT is the same voltage dropped
Guarding volts is unnecessary, however, the output con-
across the load. Using buffered PREAMP OUT minimizes
figuration does change when GUARD is enabled (see
loading effects that may occur if voltages were monitored
Figure 3-18).
at the load.
3.8 PREAMP OUT
PREAMP OUT can also be used as an external guard
source when sourcing current or charge. See paragraph
When sourcing current or charge, the PREAMP OUT and
3.72 for details.
COM terminals on the rear panel of the instrument can
be used to monitor the v&age drop across a load. Figure
3-19 shows how PREAMP OUT is configured with the
Note: Maximum current draw from PREAMF OUT is 5mA
and maximum load capacitance is 10nF.
CUTPUl
b
A. UNGUARDED
37
B. GUARDED
Figure 3-18. Volts Output Configuration
3-19

Keithley 263 Specifications

General

Brand	Keithley
Model	263
Category	Test Equipment
Language	English