Wireless Sensor AC Current Meters measure the RMS current of an alternating current system using a current transformer that wraps around the wire.
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ALTA wireless AC Current Meters measure the RMS current of an alternating current (AC) system using a current transformer (CT) that wraps around the ”hot” wire of a two wire (hot, common, ground(optional)) power system. The sensor reports Minimum RMS current, maximum RMS current, average RMS current, and amp hours to the iMonnit system. The iMonnit system is capable of generating watt hour or kilowatt hour readings as well.
| ALTA Industrial Wireless AC 20 Amp Current Meter | ||
|---|---|---|
| Supply voltage | 2.0–3.8 VDC (3.0–3.8 VDC using power supply) * | |
| Current consumption | 0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle), | |
| 2.5 mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA (radio TX mode) | ||
| Operating temperature range (board circuitry and battery) | -40°C to +85°C (-40°F to +185°F) ** | |
| Included battery | Max temperature range | -40° to +85°C (-40° to +185°F) |
| Capacity | 1500 mAh | |
| Optional solar feature | Solar panel | 5VDC/30mA (53mm x 30mm) |
| Charging temperature range | 0° to 45°C (32° to 113°F) | |
| Max temperature range | -20° to 60°C (-4° to 140°F) | |
| Included rechargeable battery | 600 mAh/>2000 charge cycles (80% of initial capacity) | |
| Solar efficiency | Optimized for high and low-light operation *** | |
| Integrated memory | Up to 3200 sensor messages | |
| Wireless range | 1,200+ ft non-line-of-sight | |
| Security | Encrypt-RF® (256-bit key exchange and AES-128 CTR) | |
| Weight | 133 g | |
| Enclosure rating | NEMA 1, 2, 4, 4x, 12 and 13 rated, sealed and weather proof | |
| UL rating | UL Listed to UL508-4x specifications (File E194432) | |
| Certifications | 900 MHz product; FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1. 868 and 433 MHz product tested and found to comply with: EN 300 220-2 V3.1.1 (2017-02), EN 300 220-2 V3.1.1 (2017-02)and EN 60950 | |
| 0-20 Amp CT Specifications | ||
| Absolute max CT current | 50 Amps RMS (A rms) | |
| Maximum accurate CT current | 20 A rms | |
| Frequency range | 50–100 Hz | |
| Accuracy | +/- (2% +.07 A rms)** | |
| Calibrated accuracy with appropriate offset | +/- (1% + .035 A rms)** | |
| Offset limits | -1.27 to + 1.27 A rms (default set to +0.1 A rms) *** | |
| Measurement resolution | ~.01 A rms | |
| Typical Deadband | ~0.1 A rms *** | |
| Current transducer dimensions | 40 mm x 25 mm x 26 mm (10 mm inner diameter) | |
| Weight | 60 g | |
| Lead Length | 3 feet | |
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