Agilent Technologies 34970A, Service Manual

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Calibration Procedures
This chapter contains procedures for verification of the instrument’s
performance and adjustment (calibration). These procedures are
required only if the internal DMM is installed . The chapter is divided
into the following sections:
• Agilent Technologies Calibration Services, on page 63
•
Calibration Interval,
on page 63
•
Time Required for Calibration, on page 64
• Automating Calibration Procedures, on page 64
•
Recommended Test Equipment,
on page 65
•
Input connections, on page 66
• Calibration Security, on page 67
• Calibration Message, on page 69
•
Calibration Count,
on page 69
•
Calibration Procedures, on page 70
• Aborting a Calibration in Progress, on page 70
•
Test Considerations,
on page 71
•
Performance Verification Tests, on page 72
• Internal DMM Verification Tests, on page 75
• Optional AC Performance Verification Tests, on page 80
•
Internal DMM Adjustments,
on page 81
• –10 Vdc Adjustment Procedure (Optional), on page 85
• Plug-in Module Test Considerations, on page 87
•
Relay Verification,
on page 88
•
Thermocouple Reference Junction (Optional), on page 112
• 34907A Analog Output, on page 114
Closed-Case Electronic Calibration
The instrument features
closed-case electronic calibration. No internal mechanical
adjustments are required. The instrument calculates correction
factors based upon the input reference value you set. The new
correction factors are stored in non-volatile memory until the next
calibration adjustment is performed. Non-volatile EEPROM
calibration memory does not change when power has been off or
after a remote interface reset.
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