The CRVW3 is a self-contained, low-cost, 3-channel VSPECTTM vibrating-wire datalogger.
It is designed to be an independent datalogger, or a reliable component in a larger data acquisition system. Arriving field-ready from the factory with power, communications, and an enclosure, the CRVW3 is built for your monitoring needs.
Benefits and Features
Complete data acquisition system in a single product
3-channel vibrating-wire datalogger (vibrating wire and thermistor)
Wireless routing communications with integrated radio options
Charge regulator for easy solar-panel connection
Configurable channels (no programming)
Options with or without enclosure & battery
Option with integral icense-free radios
The CRVW3 uses vibrating-wire spectral-analysis technology (VSPECTTM) to provide the best measurement possible for vibrating-wire sensors. VSPECTTM observes the incoming sensor signal, performs a Fourier transform and a spectral analysis, and determines the sensors' frequency by identifying the strongest signal in the acceptable range, disregarding external noise.
The CRVW3 provides the following data: the resonant sensor frequency, thermistor resistance for temperature calculation, and diagnostic values to help determine the validity of the frequency measurement.
Sensor compatibility
The CRVW3 Vibrating-Wire Datalogger is capable of measuring the most common vibrating-wire sensors including, but not limited to, strain gages, piezometers, pressure transducers, tiltmeters, crackmeters, and load cells. The CRVW3 has three sensor inputs; each sensor input includes a vibrating-wire sensor connection and a thermistor connection. The channels are easily configured for traditional sensors. Individual channels can be adjusted to read only the vibrating-wire sensor, or they may be turned off completely.
Models available
CRVW3-NA is built into a weatherproof enclosure
CRVW3-RF412 has an integral 0.25W spread spectrum radio and is built into a weatherproof enclosure
CRVW3-RF451 has an integral 1W spread spectrum radio and is built into a weatherproof enclosure
CRVW3-NE-NA nas no enclosure or radio
CRVW3-NE-RF412 has an integral 0.25W spread spectrum radio but no enclosure
CRVW3-NE-RF451 has an integral 1W spread spectrum radio but no enclosure
