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b) When the input is greater than 100A, the set transformation ratio is not correct;
c) The meter constant setting is abnormal;
d) Active and reactive power settings are abnormal;
e) Manual and photoelectric settings are not correct;
(2) Check whether the clamp meter is in the reverse direction.
4. At the time of field testing, the error fluctuation is very big, how to do?
Answer: there may be several reasons below:
1) In the case of direct sunlight, it is the best to use an object to cover the photoelectric sampler to
prevent hard light interfering with the photoelectric sampler
2) The load fluctuation is too large, and the energy meter and instrument have different reaction
speed to increase the number of laps;
3) Harmonic motion is very large, and under the unstable case, a common energy meter can only
be used for harmonic measurement, which may lead to big error and instability.
5. At the time of spot measurement, there is no current display
Answer: check whether the current setting parameters meet the equipment input configuration.
Ⅵ
. Instrument maintenance
The instrument should be avoided from being stored in a very humid environment.
The instrument is a high precision instrument, so it shall be handled with care.
The clamp meter is a kind of precision instrument, so it should be especially careful in use; it
is strictly prohibited to drop, throw, bump or collide, least affect the clamp meter performance.
When taking down the clamp meter, do not drag and pull out the lines, lest break the clamp
meter connection.
Wiping the instrument surface and panel with a corrosive organic solution is strictly
prohibited.
The clamp meter’s jaw should be kept clean, because oil and dirt will affect the accuracy of
measurement; it is the best to wipe it with anhydrous alcohol prior to each test.
After the jaw is wiped and uses, it should be properly kept, but it cannot be placed with other
sundry, lest pollute the clamp meter.
At the time of measurement, it should be as far as possible away from a big current line
(especially the jaw is not close to the big current line).
