Section 15: Calibration procedure Model 6517B Electrometer Reference Manual
15-2 6517B-901-01 Rev. C / August 2015
Warm-up period
The Model 6517B must be allowed to warm up for at least two hours before calibration is performed.
If the instrument has been subjected to temperature extremes (outside those specified in the topic
Environmental conditions (on page 15-1)), allow additional time for the temperature to stabilize.
Typically, it takes one additional hour to stabilize a unit that is 10° outside the specified temperature
range.
Recommended calibration equipment
The equipment listed in Equipment needed for verification (on page 16-2) should be used to perform
calibration.
Comprehensive calibration procedure
The following calibration procedure should only be performed by qualified service personnel, and only
after the instrument has met the warm-up criteria described in Warm-up period (on page 15-2).
The following steps are for a complete calibration. For a partial calibration, please see the Partial
calibration (on page 15-14) topic for considerations when performing a subset of the complete
calibration.
Restoring factory defaults
To restore the Model 6517B factory-default settings, send the following remote command:
:SYST:PRES
Unlocking calibration
To unlock the Model 6517B, send the following remote command:
:CAL:PROT:CODE ‘KI006517’
Note that 006517 is the default password. Supply the appropriate password if it has been changed.
Voltage offset calibration
The following steps calibrate the internal voltage offsets of the electrometer input. Connect the digital
multimeter to the PREAMP OUT terminals of the Model 6517B. Ensure that the ground link is
attached to INPUT LO.
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