Other Items And Notes - UNI-T UT2658 Operating Manual

VII. Other Items and Notes
1. Exclusiveness of Current Clamps
There are two current clamps attached to every meter, which can not be
exchanged for the other meters. Current clamps should be prevented from
any crush and kept clean in order to ensure reliability when closing up to
measure.
2. Maintenance of Current Clamps
Please clean up clamp jaw surface after measurement, soft cloth
dampened with lubricant (eg: WD-40 lubricant), not rough cloth or the
corrosive is expected to use for the clearing. Please clean again just
before use.
3. The meter can be used to measure secondary and low-voltage loops,
however, not suggested to measure current in high-voltage circuits in case
of electric shock.
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4. Three-Phase Four-Wire (phase angle under three-phase load balance)
Phase Relations Phase Value
Ua-Ub 120
Ub-Uc 120
Uc-Ua 120
5. Three-phase Three-Wire (phase angle under three-phase load balance):
Phase Relations Phase Value
Uab-Ucb 300
Uab-Ia 30
Phase Relations Phase Value
Ia-Ib 120
Ib-Ic 120
Ic-Ia 120
Phase Relations Phase Value
Ia-Ic
240
Ucb-Ic 330
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