Hioki Power HiTester 3193, Instruction Manual

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14.2 Notes on Use
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14.2 Notes on Use
・
The 9600 is a factory-fitted option. It therefore requires the 3193 unit for
calibration or repair.
・
For accurate measurement, allow one hour for warming up before use.
・
It may not be possible to obtain accurate measurements close to a
transformer or conductor carrying a large high-frequency current, or close to
any device such as a radio transmitter generating a strong magnetic field.
・ The 9600 uses the DC-CT method for measuring current, and therefore after
measuring a large current, there may be a very small residual offset voltage.
The offset voltage produces the largest error effect in the minimum ranges;
in this case, shut off the current input, and carry out degaussing (DMAG).
・ The 9600 active power measurement unit operates with an auto-zero circuit
at 2.442 kHz. For this reason, an input signal with a frequency of 2.442 kHz
will result in a periodically fluctuating display indication.
・
When measuring a high frequency voltage to earth (for example the
secondary side of an inverter), errors may occur in the measurement values.
・
Limits are specified for the range in which voltage and current level
accuracies are guaranteed, depending on the input frequency.
・
The guaranteed accuracy ranges of frequency depend on the response,
coupling mode, and low-pass filter settings.
・
Depending on the response setting, display may not stabilize during
measurement of low frequencies. If this occurs, use averaging.