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Shanghai Shengxu Electric Co., Ltd
ML12A handheld phase voltmeter
NegotiableUpdate on 06/28
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Overview
The ML12A handheld phase volt ampere meter display adopts a high contrast LCD screen with a word height of up to 25mm, and the screen angle can be freely converted by about 70 degrees; #176; To achieve better visual effects. The casing of the digital dual clamp phase volt ampere meter is made of engineering insulation material and equipped with a rubber anti vibration protective sleeve, which is safe and reliable.
Product Details
1、 Product Overview:
ML12A handheld phase voltmeterIt 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 a word height of up to 25mm, and the screen angle can be freely converted to about 70 ° for better visual effects. The casing of the digital dual clamp phase volt ampere meter is made of engineering insulation material and equipped with a rubber anti vibration protective sleeve, which is safe and reliable. Execution standard: JJG440-2008.
IIML12A handheld phase voltmeterProduct Features:
1. Voltage resistance
Test on the ability to withstand 1000V/50Hz sine wave AC voltage between the voltage input terminal and the case, the iron core and handle of the clamp current transformer (current clamp), and the secondary winding coil, and the ability to withstand 500V/50Hz sine wave AC voltage between the two voltage input terminals for 1 minute
2. Insulation resistance
Between the digital dual clamp phase voltmeter circuit and the casing, and between the two voltage input terminals: ≥ 10M Ω.
Product Parameters:
Model parameter correspondence table
Basic error of reference working conditions |
ambient temperature |
(23±5)℃ |
ambient humidity |
(45～75)% RH |
|
Tested signal waveform |
Sine wave β=0.02 |
|
Tested signal frequency |
(50±0.2)Hz |
|
Position of the tested current carrying wire in the clamp |
arbitrary |
|
The amplitude range of the measured signal during phase measurement |
100～220V、0.5～1.5A |
|
External reference frequency electromagnetic field interference |
should be avoided |
|
Basic error limit of AC voltage measurement |
20V |
|
200V | ||
500V | ||
resolution |
0.01V |
|
0.1V | ||
1V | ||
Basic error limit |
±(1.0%RD+2) |
|
input impedance |
Each limit is 2M Ω |
|
Basic error limit of AC current measurement |
200mA |
|
2A | ||
10A | ||
resolution |
0.1mA |
|
1mA | ||
10mA | ||
Basic error limit |
±(1.0%RD+2) |
|
Basic measurement error limit of power frequency phase (U-U, U-I, I-I) |
scope |
0~360° |
resolution |
1° |
|
Basic error limit |
±3° |
|
Measure the impedance of the U1-U2 phase voltage input circuit |
40KΩ |
|
Operating error under rated working conditions |
ambient temperature |
(0～40)℃ |
ambient humidity |
(20～80)% RH |
|
Tested signal waveform |
Sine wave β=0.05 |
|
Tested signal frequency |
(50±0.5)Hz |
|
Position of the tested current carrying wire in the clamp |
arbitrary |
|
The amplitude range of the measured signal during phase measurement |
When measuring U1-U2 phase: 30V~500V |
|
When measuring I1-I2 phase: 10mA~10.00A | ||
When measuring U1-I2 or I1-U2 phase: 10V~500V, 10mA~10.00A | ||
External reference frequency electromagnetic field interference |
should be avoided |
|
Rated working error limit |
Under the rated working conditions mentioned above, the rated working error limit of each measured object shall not exceed twice the corresponding basic error limit |
|
Other technical features |
display digits |
Three and a half people |
sampling rate |
3 times per second |
|
power supply |
Single 9V laminated battery, power supply current less than 5mA |
|
Overall dimensions |
Case size: 192 × 95 × 55mm3 |
|
Clamp shell size: 140 × 42 × 20mm3 | ||
Jaw size: Φ 7mm × 9mm | ||
weight |
Table body: 280g |
|
Measuring pliers: 2 × 200g | ||
Storage conditions |
Temperature: -10 ℃~50 ℃ |
|
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