RJ8921AC/DC Power Measuring Instrument
RJ8921 AC/DC Power Measuring Instrument (referred to as the measuring instrument) with ADI high-performance ARM71xx series controller as the core, using pure resistance sampling, no distortion, suitable for electrical parameter testing of small power appliances, widely used in single-phase power equipment, voltage, current, power, power factor, frequency, electrical energy, time and other electrical parameters measurement, measurement of a wide range of LED liquid crystal display, operation, simple and practical, standard with serial communication, simple and practical, standard with serial communication.
Main feature
High measurement accuracy of 0.2 class
AC and DC dual use testing
Dedicated range design: maximum voltage range of 600V, minimum voltage range of 150V, maximum current range of 20A, minimum current range of 1A, to meet the power testing needs of various types of small appliances voltage, current ratio setting function, easy to expand the measurement range
Wide bandwidth measurement: AC and DC signals are dual-use, suitable for non-standard waveform load measurement
Voltage, current, power, power factor over-limit alarm function, to meet the site to quickly identify abnormal product needs
RS-232 or RS-485 serial communication port for easy test automation and data transfer
Portability: small chassis design, compact and delicate, light weight, standard size, to meet the requirements of engineering test system installation
Technical parameter
| Model | RJ8921 |
| Measuring channel | Single-phase |
| Measured parameters | Voltage U, Current I, Active Power P, Reactive Power Q, Apparent Power S, Power Factor λ, Phase Angle φ, Voltage Frequency f, Electrical energy Wh, accumulation time, positive and negative peak voltage Upeak+/Upeak-, positive and negative peak current Ipeak+/lpeak-, 50th harmonic analysis, voltage distortion Uthd, current distortion lthd |
| Voltage measurement range | 150.00V/300.00V/600.00V/AUTO (automatic) |
| Current rated range | 500.00mA/1.0000A/20.000A/AUTO(automatic) |
| Voltage accuracy range | 1.50V~660.00V |
| Current accuracy range | 2.00mA～22.000A |
| Voltage/Current measurement accuracy | 23±5℃ |
| DC：±(0.2%rdg.+0.2%f.s.) | |
| 15Hz≤f<45Hz:±(0.1%rdg.+0.2%f.s.) | |
| 45Hz≤f≤66Hz:±(0.1%rdg.+0.1%f.s.) | |
| 66Hz<f≤1kHz:±(0.1%rdg.+0.2%f.s.) | |
| Active power measurement accuracy | 23±5℃ |
| DC：±(0.3%rdg.+0.2%f.s.) | |
| 15Hz≤f<45Hz:±(0.3%rdg.+0.2%f.s.) | |
| 45Hz≤f≤66Hz:±(0.1%rdg.+0.1%f.s.) | |
| 66Hz<f≤1kHz:±(0.2%rdg.+0.2%f.s.) | |
| Active power accuracy range | 0.003W~12.000kW |
| Active power resolution | 0.001W |
| Range of power consumption | 0.0500～1.0000 |
| Power factor accuracy | ±0.002 |
| Frequency measurement range | DC,15Hz~1kHz |
| Frequency measurement accuracy | ±(0.1%rdg.) |
| Phase angle range | D/G00.00～90.00 |
| Peak Factor Range | 1.000～400.0 |
| Integral range | 0~99999999Wh/Ah |
| Integration Accuracy | ±1% when accumulating up to 1kWh/Ah |
| Integration time | 0~999 hours, 59 minutes, 59 seconds |
| Integration time accuracy | ±1 second/hour |
| Voltage/Current Ratio | 1~9999 |
| FFT spectrum analysis | (optional)50th harmonic analysis, voltage distortion Ut electrical distortiontn |
| Alarm Function | 5 groups, voltage, current, power, power factor upper/lower limit, threshold setting |
| Control Interface | RS232(optional: RS485),switching quantity(optional) |
| Operating Environment | 0℃～40℃，20%RH～75%RH |
| Power Supply | AC220V，50/60Hz |
| Net weight | 3.7kg |
| External Dimension | 213mm×88mm×386mm (W×H×D) without foot, foot height 15mm |
| Attachment | 1 instruction manual, 1 power cord (1.5 meters), 1 communication cable (1.5 meters) |
