RJ8921PAC/DC Power Measuring Instrument
RJ8921P AC/DC Power Measuring Instrument (referred to as the measuring instrument) with ADI high-performance ARM71 series controller as the core, using pure resistance sampling, no distortion, suitable for AC/DC true RMS measurement, 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 3-window LED bright 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
TTRMS Value RMS AC/DC test
Minimum measurement current of 2mA, and it can realize measurement of standby power consumption
Fast measurement speed, the maximum refresh rate could reach 200 ms
Voltage, current ratio setting function, easy to extend the measurement range
Voltage, current, power overrun sound and light alarm function, which can meet the need to quickly identify abnormal products in the field
RS-232 or RS-485 serial communication port for easy test automation and data transfer
Beautifully designed appearance, small size and light weight
Technical parameter
| Model | RJ8921P |
| 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, electric energy Wh, electric energy timing Time |
| Peak factor at full scale | 1.6 |
| Voltage rated range | 600V |
| Current rated range | 5A card: 1A/5A 20A card: 1A/20A |
| 50A card: 1A/50A | |
| Voltage accuracy range | AC/DC:3~600V |
| Current accuracy range | AC/DC:1mA~1A/40A(Option:0.1mA~100mA/5A) |
| Voltage/Current measurement accuracy | DC, 45Hz~65Hz:±(0.1%rdg.+0.1%f.s.) |
| Active power measurement accuracy | DC ± (0.1%rdg.+0.1%f.s.) |
| PF>0.5: ±(0.1%rdg.+0.1%f.s.) | |
| PF≤0.5: ±(0.25%rdg.+0.25%f.s.) | |
| Reactive power | PF=0:±(0.25%rdg.+0.25%f.s.) |
| Active power resolution | 0.001W |
| Power Factor Range | ±(0.100～1.000) |
| Power factor accuracy | ±0.01 (Both voltage amplitude and current amplitude should be greater than |
| 10% of the corresponding range) | |
| Frequency measurement range | DC,45Hz~65Hz |
| Frequency measurement accuracy | ±(0.1%rdg.) (Voltage amplitude should be greater than 10% of the range) |
| Electrical energy range | 0～999999MWh |
| Electrical energy Accuracy | PF>0.5:±(0.1%rdg.+0.1%f.s.) |
| PF≤0.5:±(0.25%rdg.+0.25%f.s.) | |
| Electrical energy timing | 999 hours, 59 minutes, 59 seconds (±0.05%) |
| Electrical Energy Timing Accuracy | ±(0.05%rdg.) |
| Voltage/Current Ratio | 1~2000 |
| Data update cycle | 0.25,0.5,1[s] |
| Alarm Function | 5 groups, voltage, current, power upper/lower limit, threshold setting |
| Control Interface | RS232 (optional：RS485) PLC (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 (1.5meters) |
