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Introduction and Specifications
Calibrating the 5700A/5720A Series II Calibrator
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1-16. Calibrating the 5700A/5720A Series II Calibrator
The traditional practice of returning a calibrator to a standards laboratory at regular
intervals for a full calibration is time consuming, expensive, and disruptive to the task to
which the calibrator is being applied. Moreover, it leaves gaps in confidence. You must
rely on manufacturer’s specifications to determine if a calibrator will perform acceptably
in an operating environment outside the lab. Also, you must assume that drift is
predictable enough so that performance is within limits between recalls.
The 5700A/5720A Series II Calibrator makes use of Fluke design breakthroughs in the
use of internal check standards and measurement systems. As a result, it can be
completely calibrated in place to full specifications using a small number of convenient,
portable, environmentally tolerant standards available from Fluke. As you will see
below, 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.
A calibration verification procedure described in the 5700A/5720A Series II Service
Manual is recommended every two years, or as required by your established policies.
This procedure involves no adjustments. It simply 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.
Figure 1-1 illustrates the time and money that can be saved by using the 5700A/5720A
Series II calibration support plan recommended by Fluke. Depending on your policies,
you may initially decide to perform calibration verification more often. The calibrator
makes this unnecessary and offers you a practical way to collect data unavailable with a
traditional calibrator design about performance between calibrations.