Huazheng HZGC3521 Series, Руководство пользователя

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Three-phase energy meter field calibrator
2.3 Operating Precautions
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Warning: This instrument is a live working device, so for your safety, please observe
the relevant provisions of state work safety, and operate in strict accordance
with the operating instructions to field calibration of power metering devices.
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Do not clip the pulse line clamp to voltage terminal of energy meter, otherwise it will
damage the instrument;
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Do not insert the voltage terminal line into the current terminal port, otherwise it will damage
the instrument;
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Do not insert the current terminal line into the voltage terminal port, otherwise it will damage
the instrument;
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Select correctly working power supply (Note: the power range is AC57.7V ~ 480V);
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Select correctly current range, and the current range generally does not exceed 220% of
the rating;
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When measuring three-phase three-wire, B-phase voltage must be connected to the
common COM of voltage terminals;
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Each clip-on ammeter connects to the positive and negative terminal: "+" terminal is the