Establish Traceability; Calibration Reports; Range Adjustment - Fluke 5730A Calibration Manual

5730A
Calibration Manual

Establish Traceability

To establish traceability through external standards:
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Calibration Reports

The Product stores two sets of calibration constants: the set currently in use and
the old set from the previous calibration. This gives the Product the ability at any
time to produce a calibration report of the differences between the present
settings and the settings that were in effect before the last calibration. The report
shows changes for each range and function in ±ppm of range and in percentage
of specification limit. Save the report to a USB drive or retrieve it from a host
computer through either the RS-232, USB device port, Ethernet port, or IEEE-
488 interface.

Range Adjustment

After artifact calibration, further fine adjustments can be made to each range.
Range adjustments are optional and they are not necessary to meet published
specifications. However, they can help to align the Product closer to in-house
standards.
Before a range calibration, first do the Artifact Calibration as described later in
this manual. This calibrates the ranges that will not be adjusted. It also makes an
initial adjustment for each range, and supplies flatness corrections for ac
functions.
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Except for the internal ac/dc transfer standard, the internal check standards
are directly calibrated by traceable external standards every time the Product
is calibrated by Artifact Calibration.
Traceability of the ac/dc transfer standards is done by external verification.
These confirm the adjustments made during Artifact Calibrations. The internal
ac/dc transfer standard is never adjusted, so its traceability is not disturbed
by calibration. Infrequent verification is done by comparing selected ac
voltage outputs with an external dc voltage standard through an external
ac/dc transfer standard. Fluke Calibration recommends verification of this
process every 2 years or according to the policy of your organization.
Stable parameters, such as frequency flatness, determined more by circuit
geometry and dielectric constants than time, addressed in the full verification
procedures.