SMG2000B Dual-Clamp Phase Voltmeter
DARUI Electric recommends
Adopts clamp-type current transformer for input of measured current, thus no need to disconnect the circuit under test. When measuring phase between U1-U2, the two input circuits are completely isolated, avoiding possible short circuits caused by miswiring that could damage the meter. The display uses a high-contrast LCD with characters up to 25mm, and the screen angle can be freely adjusted about 70° for optimal viewing.
The meter housing is made of engineering insulating material, equipped with a rubber shockproof protective cover, safe and reliable.
SMG2000B Dual-Clamp Phase Voltmeter
Product Parameters
1. Basic Error
1.1 Reference Working Conditions
Ambient temperature: (23±5)℃.
Ambient humidity: (45～75)% RH.
Measured signal waveform: sine wave, β=0.02.
Measured signal frequency: (50±0.2)Hz.
Position of the current-carrying conductor in the clamp: arbitrary.
Measured signal amplitude range when measuring phase: 100～220V, 0.5A～1.5.
External reference frequency electromagnetic field interference: should be avoided.
1.2 Basic Error Limits
1) AC voltage (see Table 1):
| Table 1: AC voltage measurement error | ||
| Range | Resolution | Basic error limit |
| 20V | 0.01V | ±（1.2%RD+2） |
| 200V | 0.1V | ±（1.0%RD+2） |
| 500V | 1V | ±（1.2%RD+2） |
Input impedance: 2MΩ for all ranges.
2) AC current (see Table 2):
| Table 2: AC current measurement error | ||
| Range | Resolution | Basic error limit |
| 200mA | 0.1mA | ±（1.0%RD+2） |
| 2A | 1mA | |
| 10A | 10mA | |
3) Phase U-U, U-I, I-I (see Table 3):
Table 3: Power frequency phase measurement error |
||
| Range | Resolution | Basic error limit |
| 0～360° | 1° | ±3° |
When measuring U1-U2 phase, the voltage input circuit impedance: 40KΩ.
2. Operating Error
2.1 Rated Working Conditions:
Ambient temperature: (0～40)℃.
Ambient humidity: (20～80)% RH.
Measured signal waveform: sine wave, β=0.05.
Measured signal frequency: (50±0.5)Hz.
Position of the current-carrying conductor in the clamp: arbitrary.
Measured signal amplitude range when measuring phase:
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.
2.2 Rated Working Error Limits:
Under the rated working conditions described in 2.1, the rated working error limits of each measured quantity shall not exceed twice the corresponding basic error limits.
3. Other Technical Characteristics
3.1 Display digits: 3 1/2 digits.
3.2 Sampling rate: 3 times/second.
3.3 Power supply: single 9V laminated battery, power current less than 5mA.
3.4 Dimensions:
Meter body: 192mm×95mm×55mm;
Clamp body: 140mm×42mm×20mm;
Claw opening: Φ7mm×9mm.
3.5 Weight:
Meter body: 280g;
Measuring clamps: 2×200g.
3.6 Storage conditions:
Temperature: -10℃～50℃.
Note: The above information and technical parameters are compiled and released by Yangzhou DARUI Electric Co., Ltd.
