GOZ-SMG2000B Clamp Phase Meter
SMG2000B Double Clamp Digital Phase Meter is special designed for voltage, current and phase tests, it is in high-precision, low price, portable hand-held, dual-channel input measuring. 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, display the phase relationship among the CT groups of a differential protection system, and check if the wire of electric meter was correctly connected. When testing customers do not need cut off the tested current which input by slip core current transformer. When measuring the phase between U1 and U2, the two input circuit loop are completely isolated, so the possible misconnection is absolutely avoided, which may result in short circuit and may even burn the meter. The monitor of the device is high-contrast LCD screen, and the character in which could be as high as 25mm, and can be freely rotated approximately 70 °, which helps to obtain the best visual effects.
The shell of the device is made of engineering insulating material, together with a rubber–made anti-vibration protection kits for safety and reliability.
Alternative Name
Phase meter, clamp phase meter, digital clamp phase meter
1. Withstand Voltage
Parts between voltage input terminal and meter shell, parts between the iron core of the clamp-current transformer and secondary windings can stand 1000V/50Hz. Parts between the two voltage input terminals can stand Sinusoidal AC Voltage 500V/50Hz for 1min when testing.
2. Insulation Resistance
Between meter circuit and meter shell, between the two voltage input terminals:≥10MΩ
Intrinsic Error
1. Reference Operating Conditions
(1) Temperature(23±5)℃
(2) Moisture(45～75)% RH
(3) Wave forms of measured signal, sine wave、β=0.02
(4) Frequency of measured signal(50±0.2)Hz
(5) Position of Measured current carrying conductor in the nipper jaw, Optional position
(6) Amplitude range of measured signal when measuring phase,
100～220V、0.5A～1.5A
(7) External reference frequency electromagnetic interference, Should be avoided
2. Limits of Intrinsic Error
(1) AC Voltage(see Table 1)
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Table 1 Error of AC Voltage
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Measure range
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Resolution
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Limits of intrinsic error
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20V
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0.01V
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±(1.2%RD+2)
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200V
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0.1V
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±(1.0%RD+2)
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500V
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1V
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±(1.2%RD+2)
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Input Impedance:All the measure range is 2MΩ
(2) Alternating current(see Table 2)
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Table 2 Error of alternating current
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Measure range
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Resolution
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Limits of intrinsic error
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200mA
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0.1mA
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±(1.0%RD+2)
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2A
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1mA
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10A
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10mA
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(3) Phase
U-U、U-I、I-I(see Table 3)
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Table 3 Error of Power-frequency Phase
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Range
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Resolution
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Limits of intrinsic error
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0～360°
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1°
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±3°
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Impedance of input voltage loop when measuring phase of U1-U2:40KΩ
Operating error
1. Rated Operating Conditions
(1) Temperature (0～40)℃
(2) Moisture (20～80)% RH
(3) Wave forms of measured signal, sine wave、β=0.05
(4) Frequency of measured signal,(50±0.5)Hz
(5) Position of Measured current carrying conductor in the nipper jaw, Optional position.
(6) 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
(7) External reference frequency electromagnetic interference, should be avoided
2. Limits of Rated Operating Error
Under the conditions described in 1, the limits of the rated operating error will not exceed twice of the limits of intrinsic error.
Other Technical Features
1. Display, three and half
2. Sampling Rate, 3 times per second
3. Power Supply, Single 9V laminated cell、current of power is less than 5mA
4. Dimension
Meter shell, 192x95x55mm
Nipper shell, 140×42×20mm
Nipper jaw, Φ7×9mm
5. Weight
Meter body, 280g
Measuring pliers, 2×200g
6. Storage Conditions
Temperature, －10℃～50℃