The common faults and treatment methods of multi-function electric energy meter field calibrator
The company's nano-injection molds, after careful mold design, use high-quality mold steel, advanced technology processing, simple structure, easy maintenance, maintenance, low defect rate.
More than 20 YEARS experience in manufacturing Mould, die casting,stamping,CNC machining,extrusion and Plastic Injection Moulding parts.
Our Advantage:
1. We are a professional OEM manufacturer.
2. We have experienced engineers and quality control team as our strong backing.
3. High quality, competitive price, quick response is our mission.
4. Professional technical support
5. Good delivery time
6. Strict quality control process
7. Cost-Effective
8. Rich experience in mould design and production.
Injection Nano Toothbrush Mould High Pressure Injection Molding,Plastic Toothbrush Molding,Nano Toothbrush Handle Injection Mould,Injection Nano Toothbrush Mould Yangzhou Baotian Precision Mold Co, Ltd , https://www.jsbtmold.com
2. When measuring the angle, the difference between the displayed value and the actual value is very large, and the check line result is inconsistent with the actual value, you should check whether the set “check mode†is “activeâ€.
3, the LCD screen is too dark or too light, you can in the "operating instructions" state, press the up, down, left, right key to change the clarity of LCD characters, see "LCD screen contrast adjustment."
4. If the displayed reading is unstable during the parameter measurement, check whether there is a voltage input. If no voltage is input, the displayed reading will be unstable. In the presence of a voltage input, the unstable reading shown is unstable.
5, in the school table, if the verification error value is very large, there are the following possible causes: A, wiring error, phase voltage and phase current does not correspond to one, or a certain phase power is negative. B. The photoelectric sampler missamples (ie, multi-sampling or less sampling). At this time, it is necessary to readjust the position or sensitivity of the photoelectric sampler. C. The sampling current caused by the dirty end face of the clamp-shaped current transformer is too small. D. The core end face of the clamp-shaped current transformer is not completely closed. E. The meter constant was entered incorrectly. F. The ratio change of the metering device was incorrectly entered. G, site load fluctuations are too large.
6. When verifying three-phase three-wire 3×100V table with Ua and U0 power supply, there is a “click†sound on the power-on but there is no display on the screen and the connection may be wrong. Ub must be short-circuited with U0.