Product Introduction
Double Clamps Digital Phase Meter is a high-precision, low-cost, handheld dual channel input measuring instrument designed specifically for on-site voltage, current, and phase measurements. With this instrument, it is easy to measure the phase between u-u, i-i, and u-i on site, distinguish the phase sequence and three-phase voltage of sensitive circuits and capacitor circuits, detect the wiring group of transformers, test the secondary circuit and bus differential protection system, read the phase relationship between each differential protection group CT, and check the wiring of the electricity meter. Clamp type current transformers are used to input the measured current, so there is no need to disconnect the measured line. When measuring the phase between u1-u2, the two input circuits are completely insulated and isolated, thus completely avoiding the possibility of short circuiting the measured circuit due to wiring errors and burning out the measuring instrument. The display screen adopts a high contrast LCD screen, with text up to 25mm, and the screen angle can be freely converted to around 70 ° to achieve the best visual effect.
Características del producto
1、Withstand Voltage:
Between voltage input terminal and case: 500V/50Hz AC (1 min)
Between current transformer (clamp) core, handle, and secondary winding: 1000V/50Hz AC (1 min)
Between two voltage input terminals: 500V/50Hz AC (1 min)
2、Insulation Resistance:
Between lines and enclosure / two voltage inputs: ≥10 MΩ (measured with digital dual-clamp phase volt-ammeter)
Parametros del producto
Reference to working conditions
| Influence quantity | Benchmark conditions | Las condiciones de trabajo |
| Temperatura ambiente | 23℃±1℃ | ＜80% |
| Humedad ambiental | 40%～60% | 10℃～40℃ |
| Signal waveform | Sine wave β= zero point zero five | Sine wave β= zero point zero five |
| Signal frequency | 50Hz±1Hz | 45Hz～65Hz |
| Instrument operating voltage | 9V±0.1V | 9V±1V |
| Voltage amplitude during phase measurement | 100V±20V | 30V～500V |
| Current amplitude during phase measurement | 1A±0.2A | 10mA～20.00A |
| External electric and magnetic fields | Avoid | |
| Location of the tested wire | The measured wire is at the approximate Centroid of the jaw | |
General specifications
| Function | Direct testing of phase, AC current, AC voltage, AC leakage current, and phase sequence; Transformer group, inductive and capacitive circuit discrimination; Power factor and power indirect testing |
| Fuente de alimentación | DC9V alkaline Dry cell (1.5V LR6 × 6) |
| Working current | Turn on the backlight, with a maximum of 35mA and the battery working continuously for about 15 hours |
| Turn off the backlight, the instrument consumes approximately 5mA of power, and the battery operates continuously for approximately 100 hours | |
| Modo de visualización | LCD display, white screen backlight function, suitable for dim places |
| LCD Size | 70mm×62mm ；Display Domain：64mm×54mm |
| Instrument size | Length, width, and thickness: 196mm × 92mm × 54mm |
| Sample Rate | About 3 times/second |
| Rango | AC voltage: 0-20V/200V/500V |
| AC current: 0-200mA/2A/20A | |
| Phase: 0-360 ° | |
| 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 | |
| Data hold | During the test, press the HOLD key to maintain the data, and the "DH" symbol is displayed |
| Automatic shutdown | After about 15 minutes of startup, the instrument automatically shuts down to reduce battery consumption |
| Voltage detection | When the battery voltage is below 7.8V-8V, replace the battery |
| Instrument quality | The host is approximately 1140g (with battery), and the watch clamp is approximately 170g × 2. Test line approximately 250g |
| Test line length | 1.5m |
| Current clamp wire length | 2m |
| Operation temperature | -10 ℃~40 ℃; Below 80% Rh |
| Storage temperature and humidity | -10 ℃~60 ℃; Below 70% Rh |
| Impedance | The input impedance of each test voltage range is: 1m Ω |
| When measuring the phase of U1U2, the voltage input impedance is 40k Ω | |
| Pressurization | Withstand a sine wave AC voltage of 1000V/50Hz between the instrument circuit and the casing for 1 minute; Test of withstanding a sine wave AC voltage of 500V/50Hz between two voltage input terminals for 1 minute |
| Aislamiento | ≥ 10m Ω between instrument circuit and casing, and between two voltage input terminals |
| Estructura | Aislamiento doble |
Basic error and performance indicators under benchmark conditions
| Voltaje | 20V | 0,01 V | ± (0.5% of range) ° |
| 200V | 0.1V | ||
| 500V | 1V | ||
| Actual | 200mA | 0.1mA | ± (0.5% of range) ° |
| 2A | 1mA | ||
| 20A | 10mA | ||
| Fase | 0～360° | 1° | ±1° |
