Calibration Instrument Reduces Cost Of Calibrating Power Meters


The Yokogawa LS3300 is a new
dedicated, stand-alone and cost-effective calibrator that is designed to reduce
the cost and complexity of calibrating power meters and analysers with
accuracies up to 0.15%. Unlike existing multi-function calibrators, the LS3300
provides a lower cost and easy-to-use solution with specific features for
calibrating power meters. "Yokogawa is a world
market leader and a leading authority on power measurement with a long
in AC and DC calibrators", says Terry Marrinan,
Vice-President, T&M Business Unit, Yokogawa T&M Europe and Asia
Pacific: "Now, with the launch of the LS3300, we are bringing new dimensions of
cost-effectiveness and simplicity to those who need to undertake their own
calibration operations on multiple instruments with low to medium accuracies."
The LR3300 combines a
wide output (up to 1250 V and 62.5 A) with high accuracy (450 ppm or 0.045%)
and high stability (100 ppm or 0.01% for one hour). For larger current outputs,
up to 180 A can be obtained by synchronising the outputs of multiple units.
For the calibration of
3-phase power meters, it is possible to synchronise the outputs of two or three
LS3300 instruments using master/slave connections. Other features include the
capability for direct calibration of the current sensor inputs of a clamp-on
power meter using the instrument's auxiliary output, and notification of when
the output becomes stable to maximise the accuracy of the measurement.
The LS3300 is based on
the core technology of Yokogawa's AC calibrator, the 2558A, originally released
in 2013. Calibrating power meters with the 2558A, however, required two
separate 2558A instruments plus a reference power meter, whereas the LS3300
combines these functions in a single instrument to satisfy the calibration
needs of lower-accuracy power meter users.
All power meters and
analysers need calibrating to confirm their performance and to satisfy the
requirements of quality systems such as ISO9001. As a dedicated instrument for
calibrating lower-accuracy power meters at commercial mains frequencies and up
to 1.2 kHz, the LS3300 offers a cost-effective solution for users who need to
calibrate higher volumes of power meters.
These potential customers
for the LR3300 include accredited calibration laboratories, private calibration
companies, companies that manufacture measurement instruments such as power
meters, clamp power meters and smart meters, and calibration divisions and
repair service divisions of companies that use power measuring instruments in
production line testing.
At the top end, where the
highest accuracy is required and also where the application consumes power at
frequencies higher than 50/60 Hz, an ISO 17025 accredited calibration at higher
frequencies is required to prove the performance of the power analyser for the
application, and thus to validate the instrument for compliance testing and,
for example, where very small improvements in efficiency are being pursued.
As the first
non-governmental ISO 17025 accredited laboratory to offer power calibrations up
to 100 kHz, the Yokogawa European Standards laboratory in the Netherlands, with
world leading measurement uncertainties, carries out calibrations to the
highest standards. An LS3300 can therefore be delivered with an accredited
calibration enabling it to be quickly incorporated into a customer's quality

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