Multi functional digital dual clamp phase voltmeter

multi-functionalDigital dual clamp phase voltmeterThis instrument is a high-precision, low-cost, handheld, dual channel input measuring instrument designed specifically for on-site measurement of voltage, current, and phase. With this meter, it is easy to measure the phase between U-U, I-I, and U-I on site, distinguish the phase sequence of inductive and capacitive circuits and three-phase voltages, detect the wiring group of transformers, test the secondary circuit and bus differential protection system, read out the phase relationship between the CT of each differential protection group, and check the correctness of the wiring of the electricity meter. The measured current is input using a clamp current transformer conversion method, so there is no need to disconnect the measured line during measurement. When measuring the phase between U1-U2, the two input circuits are insulated and isolated, thus avoiding possible misconnections that may cause short circuits in the measured circuit and burn out the measuring instrument. The display adopts a high contrast LCD screen, with words up to 25mm high, and the screen angle can be freely converted by about 70 ° to achieve visual effects.
The instrument casing is made of engineering insulation material and equipped with rubber anti vibration protection sleeve, which is safe and reliable.

It is a handheld, dual channel input, fully digital, multifunctional, high-precision measuring instrument. This instrument applies new microprocessor technology and digital signal processing technology to measure power frequency electrical parameters (such as voltage, current effective value, power frequency, phase relationship, etc.) using direct AC sampling method. It distinguishes transformer wiring group, inductive and capacitive circuits, tests secondary circuit and bus differential protection system, reads out the phase relationship between differential protection CT groups, and checks whether the wiring of the electricity meter is correct. The meter uses clamp current transformer conversion method to input the measured current, so there is no need to disconnect the measured line during measurement. Provide a safe, accurate, and convenient new type of power meter for electricity inspection personnel.

Product Features

1. Exquisite structure, easy to use
Handheld structure;
When measuring phase within the current range of 10mA-10A and voltage range of 3V-500V, there is no need to disconnect the circuit or replace the limit;
The switch function and layout are reasonable, and rotating the switch can read the measured voltage, current, and phase.
2. High resolution
The current resolution is 0.1mA, and the voltage resolution is 0.1V.
3. Low power consumption
This phase meter is designed with micro power consumption and has battery voltage detection function.

Product Parameters

2.1 Reference working conditions
(a) Environmental temperature (23 ± 5) ℃
(b) Environmental humidity (45-75)% RH
(c) The waveform of the measured signal is a sine wave β=0.02
(d) Tested signal frequency (50 ± 0.2) Hz
(e) The position of the tested current carrying wire in the clamp is arbitrary
(f) When measuring phase, the amplitude range of the measured signal is 100-220V, 0.5A-1.5
(g) External reference frequency electromagnetic field interference should be avoided
2.2 Basic Error Limit
2.2.1 AC voltage (see Table 1)

The input impedance limits are all 2M Ω

2.2.2 AC current (see Table 2)

2.2.3 Phase
U-U, U-I, I-I (see Table 3)

When measuring U1-U2 phase, the impedance of the voltage input circuit is 40K Ω
Work error
3.1 Rated working conditions
(a) Environmental temperature (0-40) ℃
(b) Environmental humidity (20-80)% RH
(c) The waveform of the measured signal is a sine wave β=0.05
(d) Tested signal frequency (50 ± 0.5) Hz
(e) The position of the tested current carrying wire in the clamp is arbitrary
(f) The amplitude range of the measured signal during phase measurement
30V~500V when measuring U1-U2 phase
Measure the phase of I1-I2 from 10mA to 10.00A
When measuring U1-I2 or I1-U2 phase, 10V~500V, 10mA~10.00A
(g) External reference frequency electromagnetic field interference should be avoided