WMRT-A-12S

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.

Remote Station

A cost-effective way to extend the automated monitoring network into remote locations

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
MCUNone
Enclosure TypeSteel
Size (LxWxH, in)12x10x6
Weight (lbs)18
Battery12AHr
Solar20W
ReceivingRS-232
TransmittingAVW206 or AVW216
VW CommNo
OptionsMicroMux
MiniMux
MCUEnclosure TypeSize (LxWxH, in)Weight (lbs)BatterySolarReceivingTransmittingVW CommOptions
WRMT-A-12SNoneSteel12x10x61812AHr20WRS-232AVW206 or AVW216NoMicroMux
MiniMux

AVW206 / AVW216

VW Channels2
VW Range200-6000Hz
VW Resolution0.001 Hz
Thermistor Channels2
Range±2500mV
Resolution24-bit
Digital Ports3
CommunicationsRS-232, SDI-12
Wireless 900MHz (AVW206) Band910-918MHz @ 250mW
Wireless 2.4GHz (AVW216) Band2.450-2.482GHz @ 50mW
Power9.6-32VDC
Power Consumption (quiescent)~0.2mA
Power Consumption (active, no radio)~25mA
Wireless Power Consumption (active, receive)~50mA
Wireless Power Consumption (active, transmit)~100mA

Physical

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
Weight8.1 kg
18 lbs

System Power

Battery12V 12AHr sealed lead-acid
Solar20W
Output Voltage17.2VDC maximum (loaded)
Output Power1.17A maximum (20W)

MicroMux Multiplexer

Channels(4) 4-channel or (8) 2-channel (switch selectable)
Control Inputs2
Control Input Range5–16V
Power9–16V
Power Consumption (Quiescent)<0.1µA
Power Consumption (Active)~42mA
Relay ContactsGold clad silver alloy
Contact Resistance50mΩ
Contact Isolation1500V
Coil Resistance1028Ω
Relay Operate Time~2ms
Relay Release Time~1ms
Relay Max Voltage125VAC, 110VDC
Relay Max Switching 2A
Relay Life (Minimum)108 Cycles

MiniMux Multiplexer

Channels(16) 4-channel or (32) 2-channel (switch selectable)
Control Inputs2
Control Input Range5–16V
Power10–16VDC
Power Consumption (Quiescent)<0.1µA
Power Consumption (Active)~42mA
Relay ContactsGold clad silver alloy
Contact Resistance75mΩ
Contact Isolation1500V
Coil Resistance1028Ω
Relay Operate Time~2ms
Relay Release Time~1ms
Relay Max Voltage125VAC, 110VDC
Relay Max Switching 2A
Relay Life (Minimum)108 Cycles
Transient Protection Threshold75V
Transient Current Limit1kA