Campbell Scientific - CRVW3
Data Loggers
    Model: CRW3
    Country of Origiin: USA
    Use: 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 arrives factory integrated with a power supply and a weatherproof enclosure.
  • consult
Details Solution Applications Downloads Order

Benefits and Features

  • Reads and stores data from one to three vibrating-wire sensors
  • Charge regulator included for solar panel connection
  • Enclosure rated to IP66
  • Simple programming interface
  • Integrated rechargeable or alkaline battery options
  • Compatible with many existing Campbell Scientific data acquisition networks
  • PakBus router/radio repeater capabilities

Detailed Description

The 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.


Specifications

-NOTE-
  • All CRVW3 dataloggers are tested and guaranteed to meet the following electrical specifications in a -40° to +70°C non-condensing environment.
  • The base -NA option and -RF422 option are CE approved, but the -RF451, -RF407, and 
    -RF412 options are not CE approved.
Operating Temperature Range
  • -40° to +70°C
  • Non-condensing environment
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
  • 4.2 kg (9.2 lb) with rechargeable battery
  • 3.0 kg (6.6 lb) with alkaline batteries

Power

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
  • 1 mA (no radio, basic operation)
  • ~37.5 mA/s (each time a channel is measured)

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), U.S. Patent No. 7,779,690, includes diagnostic data

Measurements - Temperature (Resistance)

-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)

-RF451 Option

Internal Radio Description 5 to 1000 mW, user selectable; 902 to 928 MHz license-free band, frequency hopping spread-spectrum radio
Radio Repeater Devices with the -RF451 option can be set up as a radio repeater.
Where Used US, Canada, Australia
Compliance Information
  • KNYAMM0921TT (United States FCC ID)
  • 2329B-AMM0921TT (Canada [IC])

-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
  • MCQ-XB900HP (United States FCC Part 15.247)
  • 1846A-XB900HP (Industry Canada ([IC])
  • RCPDIXB15-0672-A2 (Mexico IF)

-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
  • ACMA RCM
  • MCQ-XB900HP (United States FCC Part 15.247)
  • 1846A-XB900HP (Industry Canada [IC])

-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.

Solution
Applications
Downloads
Order
ES-9611 CRVW3-NA-NB-SM
ES-9611A CRVW3-NA-RC-SM
ES-9611B CRVW3-NA-ALK-SM
ES-9611C CRVW3-NA-NB-UM
ES-9611D CRVW3-NA-RC-UM
ES-9611E CRVW3-NA-ALK-UM
Related Recommendations
WeChat
Micro-blog
Total Solution Provider for Advanced Civil Engineering Testing Instruments
  • 400-700-9998
  • Service Time : Monday to Sunday, 9:00-18:00
  • E-mail : marketing@epc.com.hk
Copyright © 2008~2015 Earth Products China Ltd. all rights reserved. 粤ICP备12064742号 Domestic headquarters address:West Tower 2301, Fortune Plaza, No. 116, sports east road, Tianhe District, Guangzhou
Hong Kong Headquarter Address:12/F, Asia Trade Centre, 79 Lei Muk Road, Kwai Chung, Hong Kong
Home
Products
Solutions
About Us