1-1
1.1
Introduction
The procedures in this section are intended to verify that
Model 6517A accuracy is within the limits stated in the
instrument one-year accuracy specifications. These proce-
dures can be performed when the instrument is first received
to ensure that no damage has occurred during shipment. Ver-
ification may also be performed whenever there is a question
of instrument accuracy, or following calibration, if desired.
WARNING
The information in this section is
intended for use only by qualified ser-
vice personnel. Do not attempt these
procedures unless you are qualified to
do so.
NOTE
If the instrument is still under warranty,
and its performance is outside specified
limits, contact your Keithley representa-
tive or the factory to determine the correct
course of action.
This section includes the following:
1.2
Environmental conditions:
Covers the temperature
and humidity limits for verification.
1.3
Warm-up period:
Describes the length of time the
Model 6517A should be allowed to warm up before
testing.
1.4
Line power:
Covers power line voltage ranges during
testing.
1.5
Recommended equipment:
Summarizes recom-
mended test equipment and pertinent specifications.
1.6
Verification limits:
Explains how reading limits were
calculated.
1.7
Restoring default conditions:
Gives step-by-step
procedures for restoring default conditions before
each test procedure.
1.8
Offset voltage and bias current calibration:
Covers
methods to null offset voltage and bias current.
1.9
Meter verification procedures:
Details procedures to
verify accuracy of Model 6517A measurement func-
tions: volts, amps, coulombs, and ohms.
1.10 Voltage source verification:
Covers verifying voltage
source output accuracy.
1.11 Temperature verification:
Explains how to check
temperature measurement accuracy.
1.12 Humidity verification:
Summarizes the basic proce-
dure to check humidity measurement accuracy.
1.2
Environmental conditions
Verification measurements should be made at an ambient
temperature of 18° to 28°C (65° to 82°F), and at a relative
humidity of less than 70% unless otherwise noted.