62 34410A/11A/L4411A Service Guide
3 Calibration Procedures
If the instrument fails the quick performance check, adjustment or repair
is required.
Performance Verification Tests
The performance verification tests are recommended as acceptance tests
when you first receive the instrument. The acceptance test results should
be compared against the 90 day test limits. You should use the 24–hour
test limits only for verification within 24 hours after performing the
adjustment procedure. After acceptance, you should repeat the
performance verification tests at every calibration interval.
If the instrument fails performance verification, adjustment or repair is
required.
Adjustment is recommended at every calibration interval. If adjustment is
not made, you must establish a ‘guard band’, using no more than 80% of
the specifications, as the verification limits.
Input Connections
Test connections to the instrument are best accomplished using an Agilent
Technologies 34172B calibration short for low–thermal offset
measurements and a 34171B DMM connector configured to interface to the
calibrator output. Shielded, twisted–pair, PTFE interconnect cables of
minimum length are recommended between the calibrator and the
multimeter. HI and HI Sense should be a twisted pair. LO and LO Sense
should be a twisted pair. Cable shields should be earth ground referenced.
This configuration is recommended for noise reduction and settling time
performance during calibration.
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