What Is a Phase Meter?
Phase meter is a simple operation, easy to use, and safe. Due to the current coupling and high-impedance input method, the phase difference of the track circuit and the polarity crossing of adjacent sections are checked, which solves the polarity when the adjacent section is occupied by cars Cross-checking issues. It can precisely measure the phase difference of sine / triangle / trapezoidal / square wave.
- a) High integration and high accuracy;
- b) Good stability and reliable performance;
- 1) Ranging and positioning of phased radar array, radio navigation system, automatic control system, phase difference measurement of phase voltage in power system, etc .;
- 2) It is suitable for the detection of voltage, current, frequency and phase difference of 25Hz phase-sensitive track circuit equipment.
| input signal | Waveform | Sine / triangle / trapezoidal / square wave |
| input resistance | 1M | |
| Phase range | 0 °, to, 360 °, or, ±, 180 ° | |
| Frequency Range | 10Hz, ~, 99Hz | |
| Amplitude range | 0,5 250V divided into six ranges, automatic range selection | |
| measurement accuracy | Phase measurement accuracy | ±, 0,01 °, (typical value, sine wave, 10Hz-99Hz,) |
| Phase resolution | 0,001 ° | |
| Phase repeatability | ±, 0, 01 °, or better | |
| Frequency measurement, accuracy | ±, 0,005Hz | |
| Frequency resolution | 0,001Hz | |
| Amplitude accuracy | ±, 1,5% | |
| Amplitude resolution | 1mV, 0,01V, 0,1V | |
| Response time | Below, 6s | |
| Power supply | AC220V ±, 10% | |
| Environmental characteristics | Operating temperature | (25 ±, 5) |
| Relative humidity | (45 85)% (not waterproof) | |
| storage temperature | -10 + 60 | |
| atmospheric pressure | 74,8kPa 106,6kPa (below 2500m above sea level) | |
| working environment | No strong magnetic interference | |
| Option | Packing box | Special shock-proof instrument packing box |
| custom made | Customized similar products according to customer needs |
- The comparators U1B and U1D form a zero-crossing detector for each input. For protection, four
- The first part of the open circuit is disconnected, and the second part is closed. A 1Vp-p low-frequency 50-1000Hz square wave is supplied, and is simultaneously applied to the two input terminals. Connect a digital voltmeter between the output lead and ground to monitor the output. Then adjust R7 to make the voltage read 1.800V. After adjusting, return the switch to normal circuit.
- The scale of the digital voltmeter is now calibrated to indicate the phase difference between the two inputs of this circuit, and the scale factor is 0.01%. The measurement accuracy is better than 0.2 ° at 50-1000Hz, 1Vp-p square wave, and the accuracy is better than 0.5 ° at 3Vrms (effective value) sine wave.