Voltage Measurement and Detection
Voltage Detection General Description
ALTA® Wireless AC Voltage Detection Meters detect the presence or absence of AC voltage up to 500 volts alternating current (VAC) Root Mean Square (RMS).
Key Features (for 500 VAC Model)
Detects presence or absence of voltage
Maximum detection voltage: 500 VAC RMS
Minimum detection voltage: 4 VAC RMS
Triggers on state change
Response time: ~ 1 second
Key Features (for 200 VDC Model)
Detects presence or absence of voltage
Maximum detection voltage: 200 VDC
Minimum detection voltage: 2.3 VDC
Triggers on state change
Reverse voltage protection up to 200 VDC
Principles of Operation
The ALTA Wireless 500 AC Voltage Detection Meter can be connected to the hot (black) and neutral (white) terminals of an electrical device or power supply line. The sensor will trigger on the state change from voltage presence to absence and vice versa.
When a state change is detected, the sensor reports its state? No Voltage or Voltage Detected? to the gateway,making the data available in iMonnit or another approved data service. If no change is observed within the user-configurable time interval or Heartbeat, the state is continuously reported on that interval.
200VDC Voltage Meter General Description
ALTA® Wireless 200 VDC Voltage Meters measure DC voltage up to 200 VDC on user specified intervals.
Key Features
Measures voltage up to 200 VDC
Resolution: 0.1 Volts
Accuracy:
- Uncalibrated: ± (0.1 Volts + 1% of reading)
- Calibrated: ± (0.05 Volts + 0.5% of reading)
Configurable thresholds for critical condition monitoring
Principles of Operation
The ALTA Wireless 200 VDC Voltage Meter measures the single-ended DC voltage across its two leads based on a user-configurable time interval or Heartbeat. On every Heartbeat, the sensor converts the analog voltage signal to a digital voltage measurement. This measurement is then sent to the gateway, making the data available in iMonnit or another approved data service.
The ALTA 200 VDC Voltage Meter can be calibrated for improved accuracy. Also, remember to remove any active voltages from the measurement leads when replacing batteries or performing other maintenance.
500VAC Voltage Meter General Description
ALTA® Wireless 500 AC Voltage Meters measure the voltage of an AC power system in volts alternating current (VAC) Root Mean Square (RMS) on user-specified intervals. The meter can measure up to 500 VAC RMS.
Key Features
Measures voltage up to 500 VAC RMS
Resolution: 0.1 VAC RMS
Accuracy:
- Uncalibrated: ± (1 Volt + 2% of reading)
- Calibrated: ± (0.5 Volt + 1% of reading)
Configurable thresholds for critical condition monitoring
Principles of Operation
The ALTA Wireless 500 AC Voltage Meter measures the single-ended AC voltage across its two leads based on a user-configurable time interval or Heartbeat. On every Heartbeat, the sensor converts the analog voltage signal to a digital voltage measurement. This measurement is then sent to the gateway, making the data available in iMonnit or another approved data service.
The ALTA 500 AC Voltage Meter can be calibrated for improved accuracy. Also, remember to remove any active voltages from the measurement leads when replacing batteries or performing other maintenance.
Features of Monnit ALTA Sensors
Wireless range of 2,000+ feet through 18+ walls1
Frequency-Hopping Spread Spectrum (FHSS)
Best-in-class interference immunity
Best-in-class power management for longer battery life2
Encrypt-RF® Security (Diffie-Hellman Key Exchange + Advanced Encryption Standard (AES)-128 Cipher Block Chaining (CBC) for sensor data messages)
Sensor logs 2000 to 4000 readings if the gateway connection is lost (non-volatile flash, persists through power cycling):
10-minute Heartbeats = ~ 22 days
2-hour Heartbeats = ~ 266 days
Automatic over-the-air updates to sensor firmware (future-proof)
Free iMonnit Basic Online Wireless Sensor Monitoring and Notification System to configure sensors, view data, and send alerts via SMS text, email, and voice call
1 Actual range may vary depending on the environment and gateway.
2 Battery life is determined by the sensor reporting frequency and other variables. Other power options are also available
>>Datasheet (500VAC Voltage Meter)
>>Datasheet (200VDC Voltage Meter)
>>Datasheet (500VAC Voltage Detection)
>>Datasheet (200VDC Voltage Detection)
