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FAQ
- How can the clamp meter measure alternating current?
- Direct the meter onto the wire to read the current
- The power consumption of the same load, different power motors?
- The key lies in the size of the load, according to the current data you provide, basically can determine whether the motor is loaded; if the motor using 37kW, because the load torque constant, the motor for rated torque, it is necessary to reduce speed, increasing the current, the current may be not reached before 70A would have burned the motor.
- How to maintain and maintain the communication and power room?
- AC / DC clamp type meter. AC / DC clamp meter as the daily maintenance work is one of the essential test tool, mainly used to test the voltage, current, frequency and other related parameters, it has high resolution and precision testing and more testing function. At present, the maintenance personnel usually use the FLUKE of the United States F337 AC / DC Clamp Meter (RMS), and Silicon Valley communication production of SGT-11A and SGT-12B single and double jaw clamp type table, this kind of instrument with large diameter and small jaw electrical test resolution and high precision, accurate measurement, current flow the characteristics of. At the same time, the manual design of this kind of pliers is very suitable for the occasions with small space. Noise meter. The noise meter is mainly used to test the pulse component of rectifier equipment and DC converter output voltage, that is, noise voltage. At present, the noise meter in the market is mainly analog and digital. The analog noise meter is mainly JH5151 of state owned Jianhua instrument factory. Although it is larger and heavier, it has many testing indexes and high accuracy. Digital noise meter mainly has FZY-120 and FZY-120A, it has light and easy, portable, simple test, visual display and so on. At present, maintenance personnel can choose to use according to their favorite.
- A table can be used to measure the DC current?
- The current transformer produced by the clamp meter, can only measure the AC current, accurate measurement of sine wave current near 50Hz only, cannot measure the DC current.
- How to distinguish stealing from electricity
- The so-called "stealing electricity" refers to the use of electricity to customers for illegal use of electricity for the purpose of taking all kinds of means to steal electricity.The way of stealing electricity can be classified into two categories:On the electric energy meter, transformer and the two circuit on the hands and feet, so that the metering device less or less.On the primary circuit before the metering device, the electricity is stolen and the electricity is measured around the measuring device so that it is not metered.
- Use clamp meter?
- The use of AC clamp meter measurement before estimating the measured current size, to select the appropriate range. If the magnitude of the current to be measured cannot be estimated, the maximum range of one gear shall be used for rough measurement, and then the appropriate range shall be changed according to the actual current to make more accurate measurements
- With the operation of the motor current clamp meter measuring three-phase, single-phase current is very low, what is the reason?
- Look at the correct gear selection of your caliper table; 2, whether the bayonet type table is closed properly;
- How do I add refrigerant to the wall mounted air conditioner?
- Turn on the air conditioner and turn on the refrigerant tank valve.3. Open the valve of the two way valve of the meter valve.4, at this time began to add refrigerant, watch the pressure rising gradually.5, hands up to 0.5~0.6MPa, the notes of refrigerant right, then you can turn off the refrigerant tank valve and valve meter valve. It takes about 30 minutes to fill in the refrigerant.6, if the refrigerant filling capacity is insufficient, the valve will appear all frosted, and then need to add.7, if the refrigerant filling volume is too much, there will be air valve and liquid valve all frosted, then need to drain refrigerant.
