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After-sales service
If you have any questions or the product is broken down, contact our sales representative near you. (For details, refer to the end
of this manual.)
･ Gratis warranty is effective until the earlier of 1 year after the date of your purchase or 18 months after manufacturing.
･ The gratis warranty shall apply if the product fails even though it is being used properly in the conditions, with the methods and
under the environments in accordance with the terms and precautions described in the catalogs, the instruction manual, caution
label on the product, etc.
･ Repair shall be charged for the following cases even during the gratis warranty period.
- Failures occurring due to your improper storage or handling, carelessness or fault.
- Failures due to faulty workmanship
- Failures due to faults in use and undue modification
- Failures due to accidental force such as a fire, abnormal voltage, etc. and force majeure such as an earthquake, wind, flood,
etc.
- Failures due to matters unpredictable based on the level of science technology at the time of product.
Our company shall not be liable to compensate for any loss arising from events not attributable to our company, opportunity
･
loss and lost earning of the customer due to failure of the product, and loss, secondary loss, accident compensation, damage
to other products besides our products and other operations caused by a special reason regardless of our company's
predictability
Q&A
･ General
Q
To what degree is the unit durable against overvoltage and over current?
Durability is as follows:
Momentary*: Up to 10 times as high as rated current and 2 times as high as rated voltage.
A
*Momentary means: Energizing 9 times for 0.5 seconds at 1-minute intervals, and then 1 time for 5 seconds.
Continuous: Up to 1.2 times as high as rated voltage and rated current.
Q
Can the unit be used as an electric energy meter?
A
This unit cannot be used for deal and proof of electric energy measurement stipulated in the measurement law.
Q
Are errors in wiring verifiable easily?
A
They are verifiable by the indication for discrimination support function for improper connection. (
Q
If a load such as welding equipment exists, a current flows only for a short period (e.g. 2 cycles). Is measurement possible?
The electrical amount such as current, voltage, electric power, power factor, frequency, harmonic voltage and harmonic current is
measured in a cycle of 250 ms period. So it is impossible to measure the current accurately for a short period.
A
The amount of electricity and reactive power amount are measured separately from the momentary data described above, using a
sampling period of about 4kHz continuously without intermittence. Therefore, it is possible to measure the load for a short period.
Q
Obtained values may be different from other measuring instruments. Why is it so?
There are various possible causes. Check the following first, please:
(1) Check for wiring errors.
(2) Check for the settings. (phase wires, primary voltage and primary current)
(3) Check for the short circuit on the secondary side of the current transformer (CT).
A
(4) Check that the measuring instrument used for comparison indicates a correct RMS value.
This unit indicates an RMS value. If the measuring instrument used for comparison measures an average value instead
of RMS value, distortion caused by harmonic etc. in the current of the circuit to be measured causes a significant
difference of values.
(61/71)
p.37-46)
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