The GRANITE™VWIRE 305 is an eight-channel interface for dynamic measurements of standard single-coil circuit vibrating-wire sensors. With the VWIRE 305 interface, you can operate traditional “static” gages at “dynamic” rates to achieve faster and better measurements without having to purchase or install new sensors.
The interface measures the resonant frequency of the wire between excitations using the patented vibrating-wire spectral-analysis technology (VSPECT®). VSPECT® provides very fine measurement resolution and limits the influence of external noise by discriminating between signal and noise based on frequency content. Because of this technology, the signal can be carried through longer cables in harsher noise environments, giving you flexibility in your sensor and data-acquisition system siting.
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.
|-NOTE-||Electrical specifications are valid over a -40° to +70°C range, non-condensing environment, unless otherwise specified. Extended electrical specifications are valid over a -55° to +85°C range in a non-condensing environment.|
|Operating Temperature Range||
|Scan Rates||20, 50, 100 Hz|
|CPI Baud Rate||Selectable from 25 kbps to 1 Mbps|
|Input Resistance||5 kΩ|
|Excitation Voltage Range||0 to ±3 V (6 V peak-to-peak)|
|Excitation Voltage Resolution||26 mV|
|Measurement Frequency Accuracy||±(0.005% of reading + measurement resolution)|
|Sustained Input Voltage without Damage||-0.5 to +7.1 V|
|USB||USB 2.0 full speed connection is available for attaching the device to a PC. (This port is provided to configure the module, send updates, and communicate with the Dynamic Vibrating-Wire Toolbox software. The USB port is not provided for use within a permanent data collection system.)|
|CPI||Used for connection to the data logger. Baud rate selectable from 50 kbps to 1 Mbps. (Allowable cable length varies depending on baud rate, number of nodes, cable quality, and noise environment, but can be as long as 2,500 ft under proper conditions.)|
|Mounting||Standard 1-in. grid (Optional DIN rail mounting available.)|
|Dimensions||20.3 x 12.7 x 5.1 cm (8 x 5 x 2 in.)|
|Weight||816.47 g (1.8 lb)|
Measurement Resolution at Sample Rates
|-NOTE-||Typical values for a 2.5 kHz resonant sensor|
|1 Hz Sample Rate||0.005 Hz RMS (noise level)|
|20 Hz Sample Rate||0.008 Hz RMS (noise level)|
|50 Hz Sample Rate||0.015 Hz RMS (noise level)|
|100 Hz Sample Rate||0.035 Hz RMS (noise level)|
|200 Hz Sample Rate||0.11 Hz RMS (noise level)|
|333.3 Hz Sample Rate||0.45 Hz RMS (noise level)|
Sensor Resonant Frequency Range
|20 Hz Sample Rate||
|50 Hz Sample Rate||
|100 Hz Sample Rate||
|Completion Resistor||4.99 kΩ 0.1%|
|Excitation Voltage||1.5 V|
|Resolution||0.002 Ω RMS (@ 5 kΩ thermistor resistance)|
|Accuracy||0.15% of reading (Thermistor accuracy and resistance of the wire should be considered as additional errors.)|
|Measurement Rate||1 Hz|
|Voltage||9.6 to 32 Vdc|
|Typical Current Drain||190 mA (@ 12 Vdc)|
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
|CR1000X||Requires OS version 4 or greater.|
|CR6||Requires OS version 10 or greater.|
|GRANITE 10||Requires OS version 1 or greater.|
|GRANITE 6||Requires OS version 1 or greater.|
|GRANITE 9||Requires OS version 1 or greater.|
The VWIRE 305 is compatible with CPI-enabled data loggers only.
DVW Tool Box is an application-specific software tool for demonstration and evaluation of the CDM-VW300, CDM-VW305 and VWIRE 305 dynamic vibrating-wire interfaces.
Execution of this download installs the VWIRE 305 Operating System on your computer for upload to the VWIRE 305 device with Device Configuration Utility.Liste der Änderungen
Program to read 20 Hz dynamic data from two GRANITE VWIRE 305 analyzers measuring eight channels each.
The CPI Calculator is a downloadable Microsoft Excel spreadsheet used to estimate the usage and capacity of a CPI network. The calculator provides an overview on CPI devices including the CDM-A108, CDM-A116, CDM-VW300, CDM-VW305, and the CSAT3B. The calculator can also estimate the measurement speed of the CDM-A108 and CDM-A116 based on the number of channels and measurement parameters.
The CPI Calculator is an estimation tool and will help you better understand and design CPI networks by considering the following: