How to use the hottest tongs vc3266a

How to use the clip on meter vc3266a

how to use the clip on meter vc3266a

how to use the clip on meter the clip on meter is an instrument used to measure the current of the running electrical circuit, which can measure the current without power

the clamp meter is essentially composed of a current transformer, a clamp wrench and a rectifier magnetoelectric reaction instrument

(1) mechanical zero adjustment is required before measurement

(2) select appropriate range, first select large range, then select small range or estimate according to nameplate value

(3) when the minimum measuring range is used and the reading is not obvious, the measured wire can be wound for several turns. The number of turns shall be subject to the number of turns in the center of the jaw, then the reading = indicated value × Range/full offset × Turns

(4) during measurement, the measured conductor shall be in the center of the jaw and the jaw shall be closed tightly to reduce errors

(5) after the measurement, put the change-over switch at the maximum range

(1) the voltage of the tested line shall be lower than the rated voltage of the clamp meter

(2) when measuring the current of high-voltage line, wear insulating gloves, insulating shoes and stand on the insulating pad

(3) the jaw shall be closed tightly and the range shall not be changed with electricity

comparison between pointer multimeter and digital multimeter

pointer multimeter and digital multimeter have their own advantages and disadvantages. Pointer multimeter is an average meter, which has intuitive and visual reading indication. (generally, the reading value is closely related to the swing angle of the pointer, and then it is closed, so it is very intuitive) we install and debug the models of Jinan new era assay instrument Co., Ltd., so that customers can have no worries. Digital multimeter is an instantaneous sampling instrument. It takes a sample every 0.3 seconds to display the measurement results. Sometimes the results of each sampling are very similar and not exactly the same, which is not as convenient as the pointer type for reading the results. Generally, there is no amplifier inside the pointer multimeter, so the internal resistance is small. For example, the mf-10 model has a DC voltage sensitivity of 100 kohm/v. The mf-500 has a DC voltage sensitivity of 20 kohm/v. The internal resistance of the digital multimeter can be very large, usually 1m Ω or more, because the internal amplifier circuit is used. (i.e. higher sensitivity can be obtained). This makes the influence on the circuit under test smaller and the measurement accuracy higher. The pointer multimeter has small internal resistance and uses discrete components to form a shunt and voltage divider circuit. Therefore, the frequency characteristic is uneven (relative to digital), while the frequency characteristic of the pointer multimeter is relatively better. If the basic range of the pointer multimeter is not correct, the structure is simple, so the cost is low, the function is less, the maintenance is simple, and the overcurrent and overvoltage capacity is strong. The digital multimeter uses a variety of internal oscillation, amplification, frequency division protection and other circuits, so it has many functions. For example, the "necking" phenomenon of temperature, frequency (in a lower range), capacitance, inductance, signal generator, etc. can be measured. Digital multimeter has poor overload capacity due to its internal structure and multi-purpose integrated circuit (however, some of them have been able to automatically shift gears and automatically protect, but the use is more complex). It is generally difficult to repair after damage. The output voltage of the digital multimeter is low (usually no more than 1 volt). It is inconvenient to test some components with special voltage characteristics (such as thyristor, led, etc.). The output voltage of the pointer multimeter is high (10.5V, 12V, etc.). The current is also large (for example, the maximum current of mf-500*1 is about 100 mA), which makes it convenient to test thyristors, light-emitting diodes, etc