The CRVW3 is a self-contained, low-cost, three-channel vibrating wire data logger. It is designed to be an independent data logger, or a component of your larger radio-linked data-acquisition network when it is configured with available wireless communication options. The CRVW3 includes a factory-integrated power supply and a weatherproof enclosure.
Learn about our patented VSPECT® spectral-analysis technology at our VSPECT® Essentials web resource.
The dynamic vibrating wire measurement technique is protected under U.S. Patent No. 8,671,758, and the vibrating wire spectral-analysis technology (VSPECT®) is protected under U.S. Patent No. 7,779,690.
Leia maisThe CRVW3 uses vibrating wire spectral-analysis technology (VSPECT®) to provide the best measurement possible for vibrating wire sensors. VSPECT® observes the incoming sensor signal, performs a Fourier transform and a spectral analysis (transforming the time series into individual sinusoidal components in the frequency spectrum), and determines the sensor frequency by identifying the strongest signal in the acceptable range while filtering out environmental and electrical 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.
Note: The CRVW3 requires Device Configuration Utility (DevConfig) v 2.10 or later. When radio options are used, the CRVW3 requires LoggerNet v 4.3 or later.
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.
The CRVW3 can be ordered with several wireless communication options. The following table illustrates wireless communications compatibilities in terms of networks.
RF400a | RF401A RF401a RF430a |
RF407 | RF411A RF410a RF411a RF431a |
RF412 | RF416 RF432a RF415a |
RF422 | RF450a RF451a RF452 |
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CRVW3-RF407 | ![]() |
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CRVW3-RF412 | ![]() |
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CRVW3-RF422 | ![]() |
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CRVW3-RF451 | ![]() |
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CRVW3-RF452 | ![]() |
Notes: aRetired product; no longer available.
The CRVW3 comes in a package designed for field deployment. The electronics, battery, and electrical connections are all contained within the enclosure. The CRVW3 is supplied with a basic mounting kit, or a metal universal mounting bracket can be added to facilitate installation on a post or wall.
The CRVW3 can be ordered with either a rechargeable battery or a D-cell alkaline battery pack. When the rechargeable battery is used, the CRVW3 can be easily wired to a solar panel, and the rechargeable battery will be charged using the built-in regulator on the CRVW3.
-NOTE- |
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Operating Temperature Range |
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Processor | ST ARM CORTEX-M4 (32-bit with hardware FPU, running at 144 MHz) |
Data Storage | 16 MB serial flash, up to 420,000 records (single channel), up to 160,000 records (3 channels) |
Real-Time Clock Accuracy | ±3 min. per year |
Measurement Interval Range | 1 s to 1 day |
USB Micro B | Direct connect to PC (supplies power for configuration and data collection), 2.0 full speed, 12 Mbps |
Configuration | Software configurable, no programming required |
Compliance | RoHS |
Warranty | One year against defects in materials and workmanship |
Weatherproof Enclosure Rating | NEMA 4X (IP66) with proper use of cable entry points |
Enclosure Mounting | Stainless-steel universal mount for pole/wall mount (optional) or plastic mounting tabs (included) |
Static Vibrating Wire Measurements | Supported |
Enclosure Dimensions | 24.1 x 22.9 x 14.0 cm (9.5 x 9.0 x 5.5 in.) |
Weight |
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Power |
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Charge Terminal | 16 to 28 Vdc (from solar panel or dc power converter) |
Battery Options | Rechargeable 7 Ah or 8 D-cell alkaline |
Current Drain |
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Measurements |
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Channel Count | 3 vibrating wire (VW) and 3 thermistor/RTD (temperature) measurements |
Measurement Speed | 1 s per sensor (VW and temperature) |
Measurements - Vibrating Wire |
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Measurement Excitation Options | 2 V (±1 V), 5 V (±2.5 V),12 V (±6 V) |
Measurement (Frequency) Resolution | 0.001 Hz RMS (-40° to +70°C) |
Time-series Basic Resolution | 24-bit ADC |
Measurement Accuracy | ±0.005% of reading (-40° to +70°C) |
Measurement Method | VSPECT® (Spectral Analysis), U.S. Patent No. 7,779,690, includes diagnostic data |
Measurements - Temperature (Resistance) |
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-NOTE- | Thermistor or RTD resistance can be scaled to Temperature (Deg C) per manufacturer specifications. The resulting temperature can be used as a correction factor for the sensor’s output. |
Measurement Method | Half-bridge ratiometric, 24-bit ADC, built-in completion resistor 4.99 kΩ 0.1% |
Thermistor Precision | 0.020 Ω RMS @ 3000 Ω (~0.00015 °C RMS for most vibrating wire thermistors) |
Accuracy | ±0.15% of reading (-40° to +70°C) |
-RF407 Option |
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Internal Radio Description | 5 to 250 mW, user selectable; 902 to 928 MHz license-free band, frequency hopping spread-spectrum radio |
Radio Repeater | Devices with the -RF407 option can be set up as a radio repeater. |
Where Used | US, Canada |
Compliance Information |
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-RF412 Option |
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Internal Radio Description | 5 to 250 mW, user selectable; 915 to 928 MHz license-free band, frequency hopping spread-spectrum radio |
Radio Repeater | Devices with the -RF412 option can be set up as a radio repeater. |
Where Used | Australia |
Compliance Information |
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-RF422 Option |
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Internal Radio Description | 2 to 25 mW, user selectable; 863 to 870 MHz license-free band, frequency hopping spread-spectrum radio |
Where Used | Europe and some of Asia (ETSI) |
EU Conformity | View the EU Declaration of Conformity in the Documents section of the web page. |
-RF452 Option |
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Internal Radio Description | 10 to 1,000 mW, user selectable; 902 to 928 MHz license-free band, frequency hopping spread-spectrum radio |
Radio Repeater | Devices with the -RF452 option can be set up as a radio repeater. |
Where Used | US, Canada, Australia |
Compliance Information |
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A software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package.
Supported Operating Systems:
Windows 11 or 10 (Both 32 and 64 bit)
Number of FAQs related to CRVW3: 11
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