
Operator Maintenance and Calibration
5730A Calibration
7
7-7
5730A Calibration
The 5730A Calibrator makes use of internal check standards and measurement systems.
As a result, it can be completely calibrated in place to full specifications with a small
number of convenient, portable, environmentally-tolerant standards available from Fluke
Calibration. This procedure is traceable to military standard requirements.
When manufactured, each Calibrator is calibrated and thoroughly verified with process
metrology and calibration standards traceable to the U.S. National Bureau of Standards.
A certificate of calibration is included.
The calibration verification procedure is recommended every 2 years or as required by
established policies. This procedure involves no adjustments. It ensures internal processes
are in control, and establishes parallel external traceability paths for internal functions
such as ac transfers that are never adjusted or corrected.
The Artifact Calibration Process
Calibration requires only three external standards or artifacts: 10 V, 1
Ω
, and 10 k
Ω
.
Environmentally-controlled internal check standards provide the primary reference
points. A stored table of calibration constants defines additional reference points for
controlling the output. Traceable calibration and adjustment to the specified level of
performance is accomplished in a semi-automated process that revises this table.
When finished with artifact calibration, but before the new constants are saved, the
5730A Calibrator presents the proposed adjustments as +/- ppm of range and percentage
change in specification for each range and function. A list of changes can be saved to a
file through the USB host port on the front of the Calibrator, or send them to a computer
through either the serial port, USB device port, Ethernet port, or the IEEE-488 port. Also
on completion of calibration, the Calibrator shows the largest proposed change.
Calibration can be completed as far as deriving and printing the proposed adjustments
without entering the calibration protection passcode. To save the changes in non-volatile
memory to adjust future outputs from the Calibrator, the passcode must be entered from
the front panel or with a remote command. The passcode entry menu is shown on the
display when necessary.
Summary of Contents for 5730A
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