Keithley 263 User Manual

APPLICATIONS
UHF-TO-BNC ADAPTER
(KEITHLEY P/N CS-115)
BNC TO TRIAX ADAPTER
\ I 7
MODEL 610C
(KEITHLEY MODEL
I
COMMON
FAST
FEEDBACK
Figure 6-11. Model 610C Ohms Accuracy Checks (ziGa)
5.4.6 Model 602 Electrometer Calibra-
tion
There are no adjustments involved in calibrating the
ranges of the Model 602. Instead, calibration consists of
checking range accuracy and replacing defective compo-
nents hsually resistors out of specification).
Referring to the calibration procedure in the Model 602
Instruction Manual, use the Model 263 to check range ac-
curacies of the electrometer. Connect the Model 263 to the
Model 602 as shown in Figure 5-12.
1. Voltage Accuracy Check -Use the voltage source of
the Model 263 to check all but the 1mV and 3mV
ranges of the Model 602.
2. Current Accuracy Check - The procedure in this
paragraph uses two different current sources to pro-
vide the required current levels. Instead, use the
Model 263 to accurately source all required current
levels.
3. Resistance Accuracy Checks - The procedures in
this paragraph use precision resistors to check accu-
racy. Instead, use the Model 263 to source the appro-
priate resistance. When sourcing 1OOMQ or more to
the Model 602, it is recommended that guarding be
used. For guarded ohms, enable guard on the Model
263, place the feedback switch of the Model 602 in the
FAST position, and connect the instruments as
shown in Figure 5-13.
4. Charge Accuracy Check - The procedure in this
paragraph sources 1OV through a high-megohm re-
sister. A better technique to check charge accuracy is
to source the appropriate cha.rge level for each range
using the charge source of the Model 263. Typical
rise times using this technique are a couple of sec-
onds and not 10 seconds as listed in Table 4-3 of the
Model 602 manual.
5. Unity-Gain Check - This procedure can be per-
formed by using the Model 263 to source ilO.OOOOV.
5-18

Keithley 263 Specifications

General

Brand	Keithley
Model	263
Category	Test Equipment
Language	English