PF9800 Series User's Manual
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©
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30
65Hz
）
Note
：
the test equipments should be qualified regular metrological
verification specification.
8.4 Inspection items and methods
8.4.1 Items of calibration and test
Test the measuring accuracy of voltage, current, active power and active power in
PF9800 series instrument in normal work. The accuracy of other electric parameters is
calculated such as wave crest ratio and power factor.
8.4.2 Method of calibration and test
(1) The wiring method of test is shown in figure 8.1 . Please connect the
instrument, signal source and standard meter correctly.
(2) Ensure that the output of voltage and current of signal is in the input range of
the instrument. Read and record the data of voltage, current, active power and
frequency.
The error is calculated according to the formula (1) and the measuring results should
meets the requirements of measurement accuracy in chapter 2.2.
R=B
X
-B
N
(1)
where
：
B
N
：
reading data of standard meter
B
X
：
reading data of detected instrument
R
：
instrument measurement error.
