Remote Station
A cost-effective way to extend the automated monitoring network into remote locations
FOR DEMANDING ENVIRONMENTS AND REMOTE LOCATIONS
The Canary Systems® WRMT-A-12S is a Wireless Remote Station designed to monitor vibrating wire sensors and level switches. The Remote Station does not contain a data logger; instead, multiple remote stations can be paired with a Canary Systems MLDAQ base station serving as the master datalogger. The WRMT-A-12S contains a Campbell Scientific AVW206 or AVW216 instrument with a built-in 900 MHz (AVW206) or 2.4 GHz (AVW216) spread spectrum radio, and a Canary Systems® MicroMux or MiniMux multiplexer.
The AVW2xx is a vibrating wire interface that allows to measure vibrating wire strain gauges, pressure transducers, piezometers, tiltmeters, crackmeters, and load cells. In addition to vibrating wire sensors, the Remote Station also has the ability to read thermistor or resistive sensors. This allows the use of other types of sensors besides vibrating wire. The AVW2xx provides 2 sensor inputs. The optional MicroMux or MiniMux multiplexers provide 4 and 16 additional Channels of VW sensor inputs, expanding the channel measurement capability from 2 sensors to 5 or 17, respectively.
The built-in spectrum radio is available in 900MHz (AVW206) or 2.4GHz (AVW216) bands, depending on the application and desired range, and comes with the appropriate 900MHz 9dBi Yagi Antenna. Ranges of up to 20 miles (32 km) are possible.
Battery & Enclosure
Power to all components is supplied by a 12V 12AHr rechargeable lead-acid battery including a 20W solar panel. The batteries are suitable for several weeks of operation without sunlight, and are delivered, installed and ready to use. It should last for 3-5 years. The application and measurement interval have a large effect on battery life. The WRMT-A-12S is capable of retrieval and storage of its own battery voltages. These metrics are valuable to monitoring the status of power to the stations.
At the bottom of the steel enclosure are connections for the solar panel, external antenna and 2 or 4 cable glands for vibrating-wire sensors. The charging is controlled by a Sunsaver charge controller unit.
The complete list of features and specifications is detailed on the AVW206/AVW216 and MicroMux/MiniMux data sheets available from our website or by contacting Canary Systems® directly.
Warranty for the WRMT-A-12S is applicable for 1 year.
Vibrating Wire
The vibrating wire interface allows to measure strain gauges, pressure transducers, piezometers, tiltmeters, crackmeters, and load cells
And More
The Remote Station has the ability to reads thermistor and resistive sensors, allowing the use of other types of sensors
Specifications
| WRMT-A-12S | |
|---|---|
| MCU | None |
| Enclosure Type | Steel |
| Size (LxWxH, in) | 12x10x6 |
| Weight (lbs) | 18 |
| Battery | 12AHr |
| Solar | 20W |
| Receiving | RS-232 |
| Transmitting | AVW206 or AVW216 |
| VW Comm | No |
| Options | MicroMux MiniMux |
| MCU | Enclosure Type | Size (LxWxH, in) | Weight (lbs) | Battery | Solar | Receiving | Transmitting | VW Comm | Options | |
|---|---|---|---|---|---|---|---|---|---|---|
| WRMT-A-12S | None | Steel | 12x10x6 | 18 | 12AHr | 20W | RS-232 | AVW206 or AVW216 | No | MicroMux MiniMux |
Transmitting
AVW206 / AVW216 | |
| VW Channels | 2 |
| VW Range | 200-6000Hz |
| VW Resolution | 0.001 Hz |
| Thermistor Channels | 2 |
| Range | ±2500mV |
| Resolution | 24-bit |
| Digital Ports | 3 |
| Communications | RS-232, SDI-12 |
| Wireless 900MHz (AVW206) Band | 910-918MHz @ 250mW |
| Wireless 2.4GHz (AVW216) Band | 2.450-2.482GHz @ 50mW |
| Power | 9.6-32VDC |
| Power Consumption (quiescent) | ~0.2mA |
| Power Consumption (active, no radio) | ~25mA |
| Wireless Power Consumption (active, receive) | ~50mA |
| Wireless Power Consumption (active, transmit) | ~100mA |
Physical & Electrical
Physical | |
| Operating Temperature | -40° to +70° C -40 to +160° F |
| Enclosure Size (L x W x H) | 30 x 25 x 15 cm 12 x 10 x 6 in |
| Weight | 8.1 kg 18 lbs |
System Power | |
| Battery | 12V 12AHr sealed lead-acid |
| Solar | 20W |
| Output Voltage | 17.2VDC maximum (loaded) |
| Output Power | 1.17A maximum (20W) |
Options
MicroMux Multiplexer | |
| Channels | (4) 4-channel or (8) 2-channel (switch selectable) |
| Control Inputs | 2 |
| Control Input Range | 5–16V |
| Power | 9–16V |
| Power Consumption (Quiescent) | <0.1µA |
| Power Consumption (Active) | ~42mA |
| Relay Contacts | Gold clad silver alloy |
| Contact Resistance | 50mΩ |
| Contact Isolation | 1500V |
| Coil Resistance | 1028Ω |
| Relay Operate Time | ~2ms |
| Relay Release Time | ~1ms |
| Relay Max Voltage | 125VAC, 110VDC |
| Relay Max Switching | 2A |
| Relay Life (Minimum) | 108 Cycles |
MiniMux Multiplexer | |
| Channels | (16) 4-channel or (32) 2-channel (switch selectable) |
| Control Inputs | 2 |
| Control Input Range | 5–16V |
| Power | 10–16VDC |
| Power Consumption (Quiescent) | <0.1µA |
| Power Consumption (Active) | ~42mA |
| Relay Contacts | Gold clad silver alloy |
| Contact Resistance | 75mΩ |
| Contact Isolation | 1500V |
| Coil Resistance | 1028Ω |
| Relay Operate Time | ~2ms |
| Relay Release Time | ~1ms |
| Relay Max Voltage | 125VAC, 110VDC |
| Relay Max Switching | 2A |
| Relay Life (Minimum) | 108 Cycles |
| Transient Protection Threshold | 75V |
| Transient Current Limit | 1kA |
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