Instrument Expert
Original factory packaging
Service Hotline：
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Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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Datasheet
The CRVW3-NE is a three-channel vibrating wire data logger. It is designed to be an independent data logger, or you can use it as a reliable component in your larger data acquisition system. The CRVW3-NE has multiple communication options and a power regulator for easy solar panel and battery connection.
The CRVW3-NE and the CRVW3 are similar products that share the same electronic components. The main difference between them is that the CRVW3-NE allows you to select the enclosure and battery, whereas the CRVW3 includes an environmental enclosure and battery as a complete system.
The CRVW3-NE 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-NE 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.
Reads and stores data from one to three vibrating wire sensors
Charge regulator included for solar panel connection
Simple configuration interface
Compatible with many existing Campbell Scientific data acquisition networks
PakBus router/radio capabilities
User-selectable battery and enclosure options
| Operating Temperature Range |
|
| 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 |
| Static Vibrating Wire Measurements | Supported |
| Mounting | Mounting holes for easy mounting and installation in a Campbell Scientific enclosure |
| Dimensions | 18.4 x 12.7 x 4.5 cm (7.25 x 5.0 x 1.75 in.) |
| Weight | 0.36 kg (0.8 lb) |
| Power | |
| Charge Terminal | 16 to 28 Vdc (from solar panel or dc power converter). Typical applications use 10 to 20 W panels. |
| Battery Terminal | Sealed, rechargeable, lead-acid batteries. Typical applications use 7, 12, and 24 Ah rechargeable batteries. |
| Current Drain |
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| Measurements | |
| Channel Count | 3 vibrating wire (VW) and 3 thermistor/RTD (temperature) measurements |
| Measurement Speed | 1 s per sensor (VW and temperature) |
| Measurements - Vibrating Wire | |
| 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), includes diagnostic data |
| Measurements - Temperature (Resistanh3> | |
| -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 | |
| 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 |
|
| -RF412 Option | |
| 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 |
|
| -RF422 Option | |
| 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. |
| -RF427 Option | |
| Internal Radio Description | 5 to 250 mW, user selectable; 905/920 MHz license-free band, frequency hopping spread-spectrum radio |
| Radio Repeater | Devices with the -RF427 option can be set up as a radio repeater. |
| Where Used | Brazil |
| Compliance Information | 08335-17-10644 Brazil (ANATEL standards in Resolution No. 506) |
| -RF452 Option | |
| 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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