SMG-2000 Digital Phase Meter
SMG-20000 Double Clamp Digital Phase Meter is special designed for testing voltage current and phase onsite it is in high-precision low price portable hand-held dual-channel input measuring products.
Description
SMG-20000 Double Clamp Digital Phase Meter is special designed for testing voltage current and phase onsite it is in high-precision low price portable hand-held dual-channel input measuring products. It’s easy to measure the phase between U-U I-I and U-I identify the inductive circuit capacitive circuit and the phase sequence of three-phase voltage detect the wiring group of transformer test the secondary circuit and bus differential protection system read the phase relationship among the CT groups of a differential protection system and check if the watthour meter was correctly wired. When testing customers do not need cut off the measured circuit which input by split core current transformer. When measuring the phase between U1 and U2 the two input circuit loop are completely insulated isolation so the possibility of misconnection is absolutely avoided which may result in short circuit or even burn the meter. The device with high-contrast LCD screen and the character in big size which helps to obtain the best visual effects.
Product characteristics
1. Ingenious structure easy to operate.
A. hand held structure
B. you should not disconnect the circuit or change the measurement range under 10mA-10A 3V-500v.
C. use high contrast LCD character can be 25mm the screen angle can be 700 to obtain the best visual effects
D. the function and layout of the switch are reasonable rotating can read the measuring voltage current and phase.
2. High resolution： Adopt new type patent current clamp current resolution up to 0.1mA; voltage resolution up to 0.1V.
3. Low power consumption ：This product with micro power consumption design and with the function of testing the voltage of battery
Technique Parameters
1. Intrinsic Error
|
Reference Working Conditions |
Temperature |
(23±5)℃ |
|
Hunidity |
(45～75)%RH |
|
|
Wave forms of measured signal |
sine wave、β=0.02 |
|
|
Frequency of measured signal |
(50±0.2)Hz |
|
|
Position of Measured current carrying conductor in the nipper jaw |
Optional position |
|
|
Amplitude range of measured signal when measuring phase |
100～220V、0.5～1.5A |
|
|
External reference frequency electromagnetic interference |
Should be avoided |
Limits of Intrinsic Error
1. AC Voltage
|
Table 1：Measurement Error of AC Voltage |
||
|
Measure range |
Resolution |
Limits of intrinsic error |
|
20V |
0.01V |
±(0.3%RD+0.2% Range) |
|
200V |
0.1V |
±(0.3%RD+0.2% Range) |
|
500V |
1V |
±(0.3%RD+0.2% Range) |
Input Impedance：2MΩ for all the measure range .
Voltage input impedance of phase testing: >500KΩ
2. Alternating current
|
Table 2：Measurement Error of alternating current |
||
|
Measure range |
Resolution |
Limits of intrinsic error |
|
200mA |
0.1mA |
±(0.3%RD+0.2) |
|
2A |
1mA |
|
|
10A |
10mA |
|
3. Phases U-U、U-I、I-I (see Table 3)
|
Table 3： Measurement Error of Power-frequency Phase |
||
|
Range |
Resolution |
Limits of intrinsic error |
|
0～360° |
1° |
±2° |
Impedance of input voltage loop when measuring phase of U1-U2：40KΩ
2. Operating error
|
Rated Working Conditions |
Temperature |
(0～40)℃ |
|
Humidity |
(20～80)% RH |
|
|
Wave forms of measured signal |
Sine wave、β=0.05 |
|
|
Frequency of measured signal |
(50±0.5)Hz |
|
|
Position of Measured current carrying conductor in the nipper jaw |
Optional position. |
|
|
Amplitude range of measured signal when measuring phase |
Phase U1-U2：30V～500V |
|
|
Phase I1-I2：10mA～10.00A |
||
|
Phase U1-I2 or I1-U2：10V～500V、10mA～10.00A |
||
|
External reference frequency electromagnetic interference |
should be avoided |
|
|
Limits of Rated Working Error |
Under the conditions described in 1, the limits of the rated operating error will not exceed twice of the limits of intrinsic error. |
3. Other technical features
|
Display |
three and half |
|
|
Sampling rate |
3 times per second |
|
|
Power supply |
Single 9V laminated cell、current of power is less than 5mA |
|
|
Dimensions |
Meter shell |
192×95×55mm3 |
|
Clamp shell |
140×42×20mm3 |
|
|
Nipper jaw |
Φ7mm×9mm |
|
|
Weight |
Meter body |
280g |
|
Measuring clamps |
2×200g |
|
|
Storage Conditions |
Temperature |
－10℃～50℃ |
| No. | Name | QTY |
| 1 | Host | 1 |
| 2 | Test line | 1 |
| 3 | Clamp | 2 |
| 4 | Case | 1 |
| 5 | Instruction manual | 1 |
| 6 | Test Report | 1 |
| 7 | Certification | 1 |
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