CRVW3 3-Channel Vibrating Wire Datalogger
Self-Contained Vibrating Wire Datalogger
Using patented VSPECT™ technology
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Überblick

The CRVW3 is a self-contained, low-cost, 3-channel VSPECT 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.

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Funktionen und Vorteile

  • Reads and stores data from one to three vibrating-wire sensors
  • Complete data acquisition system in a single product
  • Charge regulator included for solar panel connection
  • 3--Kanal Schwingsaitendatenlogger (Schwingsaiten und Thermistor)
  • Wireless routing communications with integrated radio options
  • Laderegler zur einfachen Verbindung mit Solarzelle
  • Gehäuse IP66
  • Konfigurierbare Kanäle (keine Programmierung notwendig)
  • Simple programming interface
  • Compatible with many existing Campbell Scientific data acquisition networks
  • PakBus router/radio repeater capabilities
  • Integrierte wiederaufladbare Batterie oder Alkalibatterie

Bilder

CRVW3 Inside View
CRVW3 Inside View
CRVW3 Inside View
CRVW3 Mounted Enclosure with Inside View (pole sold separately)
CRVW3 Mounted Enclosure, Front View (pole sold separately)
CRVW3 Mounted Enclosure, Back View with Universal Mounting Bracket
CRVW3 Enclosure Bottom, Antenna Connection, and Cable Entry Points (typical of the radio options)

Technische Beschreibung

Der CRVW3 verwendet Schwingsaiten Technologie kombiniert mit Spaktralanalyse (VSPECT) um die bestmöglcihen Messergebnisse für Schwingsaitensensoren zu erhalten. VSPECT erfasst das eingehende Signal vom Sensor, führt eine Fourier- Transformation und eine Spektralanalyse durch und bestimmt die Frequenz des Sensors indem er das stärkste Signal identifiziert im Bereich und externes Rauschen und Störgeräusche ausschließt.

Der CRVW3 bestimmt folgende Werte: die Resonazfrequenz des Sensors, Widerstand des Thermistors zur Temperaturbestimmung und diagnostische Werte zur Abschätzung der Validität der Frequenzmessungen.

Hinweis: Der CRVW3 braucht Device Configuration Utility (DevConfig) v 2.10 oder höher. Wird die Funkoption genutzt braucht man LoggerNet v 4.3 oder höher.

Spezifikationen

-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.

Kompatibel mit

Sensors

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.

Network Considerations

The CRVW3 can be ordered with several wireless communication options. The following table illustrates wireless communications compatibilities in terms of networks.

CRVW3 Network Compatibility

RF400a RF401A
RF401a
RF430a
RF407 RF411A
RF410a
RF411a
RF431a
RF412 RF416
RF432a
RF415a
RF422 RF450a
RF451
RF427
CRVW3-RF407
CRVW3-RF412
CRVW3-RF422
CRVW3-RF451
CRVW3-RF427

Notes: aRetired product; no longer available.

Enclosure Considerations

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.

Power Considerations

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.


Downloads

Device Configuration Utility v.2.22 (42.3 MB) 12-09-2019

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 10, 8.1, 8, and 7 (Both 32 and 64 bit)

Liste der Änderungen

CRVWx Firmware v.4.03 (909 KB) 09-11-2017

Current version of the CRVWx firmware.  Requires the Device Configuration Utility to upload the firmware to the CRVWx.

Liste der Änderungen

FAQs für

Number of FAQs related to CRVW3: 10

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  1. The CRVW3 takes approximately 1 s to measure the vibrating-wire sensor and thermistor. If all three channels are measuring sensors, the CRVW3 takes approximately 3 s to measure the sensors before it is ready to begin the cycle again.

  2. Yes. The batteries can be switched at any time between the D-cell battery option and the rechargeable battery option.

  3. Yes. The CRVW3 can be used as a stand-alone datalogger. If the CRVW3 is not connected to a network, data is collected by connecting directly to the CRVW3 (via USB) or through a simple wireless connection, as outlined in the manual.

  4. The communications options (such as –RF451) reflect how the CRVW3 is built during the manufacturing process. After a CRVW3 is ordered with a specific communications option, it retains that option. It is possible to turn off the wireless communications, and the CRVW3 can be deployed as a stand-alone data logger.

  5. No. The CRVW3 has built-in memory and can be configured in a variety of ways. It can measure data frequently and communicate the data at a slower rate (for example, measure every 10 minutes and communicate the results once per day). The CRVW3 can also communicate data after each measurement is taken.  The ability to configure the communications on a network to an application's specific needs allows the user to better manage the power consumption on the CRVW3, as well as on the base data logger.

  6. No. The CRVW3 is designed to be a simple, quickly deployed system with minimal modifications. The simple design of the CRVW3 does not enable it for use with multiplexers. When an application requires multiplexers, consider using a CR6 Measurement and Control Datalogger instead.

  7. There are multiple communication options depending on how the CRVW3 is ordered. All CRVW3 devices can communicate data and be configured using the built-in USB connection. If a CRVW3 is ordered with a wireless communication option, it can also communicate the data wirelessly to a PC or another datalogger.

  8. Yes. The CRVW3 is a PakBus device that can communicate with other PakBus data loggers. The neighbor data logger requires a radio device compatible with the CRVW3 radio option. If a CRVW3-RF451 model is used, the neighbor device needs to have an RF450 or RF451 radio installed to enable wireless communications. After connecting to the first neighbor, PakBus routing can be used to reach other PakBus devices available to that neighbor via any type of active communications link (TCP/IP, WiFi, etc.) Network Planner is a tool within LoggerNet used to design a network and explore how devices communicate.

  9. Not much. The CRVW3 needs to be configured, installed, and wired at the site. These steps have been outlined in the Quick Deploy guide that ships with the CRVW3 and is also available for download on this website. The manual is a more detailed resource to address any installation questions.

  10. Yes. To connect with an existing network, it is important to use the same or compatible radios. If an older radio model is used on the network, the radios can be updated to a more recent model, or two types of radios can be used with a single datalogger to act as a radio technology bridge (gateway). For example, a CR1000 with an RF401 and RF450 can be used to communicate with older RF401-compatible devices and also with the CRVW3-RF451.