The VW V-Logger is a compact data logger designed to monitor four or eight (model dependant) vibrating wire sensors. It is simple to use and economical to deploy. The VW V-Logger is ideal for monitoring multilevel piezometers and multipoint extensometers. It is also useful for supplementing a larger, centralized data logging system.
Simple to Use: Learn how to use the V-Logger in minutes, not hours. There are no programs to write and no switches to set.
Cost-Effective: V-Loggers are the right size for many projects. It is possible to deploy two or three V-Loggers for less than the cost of a full-size logger, while significantly reducing cable costs and eliminating the need for complex programming.
Reliable:The V-Logger is rated for temperatures from -40 to +85°C, and is IP68 rated. Readings are stored in secure, non-volatile memory.
Flexible Communication Options: The base model of V-Logger features USB communication between the unit and the computer running the supplied Logger Manager program. Alternatively, an RS-232 option is available to allow connections to external spread-spectrum radios or cellular modems. Finally, the logger can be provisioned with DGSI’s custom Hermes radio, an integrated spread-spectrum radio designed with power management in mind.
Convenient Data Processing: The supplied Manager program retrieves readings and stores them in a text file, ready to open with a spreadsheet. The file contains two data values for each reading: a value in Hz and a value in engineering units. Thus calibration factors need not be applied in the spreadsheet, if they are programmed into the V-Logger
Atlas Compatible: The Manager software can also store data in a format that is compatible with Slope Indicator’s Atlas web-based monitoring software.
Compact: The V-Logger measures 228.26mm H x 198.1mm W x 97.3mm D (9.0 x 7.8 x 3.83 inches).
For more information
You also might need to download the datasheet for the VW V-Logger Series with Spread-Spectrum Radio for China.
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VW V-Logger Specifications
|4-Channel V-Logger with RS-232||52615248|
|8-Channel V-Logger with RS-232||52615288|
|V-LOGGER W/ RADIO MODELS|
|4-Channel V-Logger with Radio, North America (902 - 928 MHz)||52615142|
|4-Channel V-Logger with Radio, Europe (863 - 870 MHz)||52615144|
|4-Channel V-Logger with Radio, Australia (915 - 928 MHz)||52615146|
|4-Channel V-Logger with Radio, China||52615148|
|8-Channel V-Logger with Radio, North America (902 - 928 MHz)||52615182|
|8-Channel V-Logger with Radio, Europe (863 - 870 MHz)||52615284|
|8-Channel V-Logger with Radio, Australia (915 - 928 MHz)||52615186|
|8-Channel V-Logger with Radio, China||52615188|
|Hermes Wing (Base Station) North America (902 - 928 MHz)||59001100|
|Europe (863 - 870 MHz)||59001200|
|Australia (918 - 926 MHz)||59001300|
|Lithium D-Cell, Installed (3.6V,19 Ah)||52615122|
|Pole Attachment with 1" Pipe||52615130|
|Pole Attachment with 1.25" Pipe||52615131|
|Pole Attachment with 1.5" Pipe||52615132|
|Extra Capacity Battery|
|The Extra Cap Battery option adds 3 additional lithium batteries for at least 10 years of battery life (9 years with 8 channels) with readings every 15 minutes in moderate temperatures or approximately 9 years battery life (5 years with 8 channels) in extreme cold weather|
|Dimensions (default)||230 x 200 x 95 mm (9.1 x 7.9 x 3.7 inches)|
|Measurement Range||Reads vibrating wire sensors operating in the range of 450-6000 Hz. Reads thermistors or RTDs in the range of -20 to 120°C|
|Logger Resolution||0.001Hz for vibrating wire sensors|
0.1°C for temperature sensors
|Logger Accuracy||±0.05Hz for vibrating wire sensors|
±0.05°C for temperature sensors
|Data Storage||Stores 65,520 records per channel in secure, nonvolatile memory. Each record includes a VW reading and temperature reading with time and date. When memory is full, recording either stops or continues by overwriting previous readings, starting with the oldest, depending on how the user set up the logger during installation|
|Logger Settings||Date, time, memory mode, and communication settings. Memory mode determines if logging stops when memory is full or if logging continues by overwriting earliest readings|
|Logger Schedule||Logger start time can be set to a specific date and time so that readings are synchronized with other loggers. Reading intervals can be specified by day, hour, minute, and second. Maximum interval is 1 year. Minimum interval is 15 seconds for the 4-channel logger and 30 seconds for the 8-channel logger|
|Sensor settings||Sensor ID, serial number, calibration factors, and sweep range for each sensor. Choice of thermistor or RTD for temperature channels|
|Power (default)||One lithium D-cell battery provides power for 9 years for the 4-channel logger (over 6 years for the 8-channel logger) in moderate temperatures, assuming readings taken every hour|
|Weatherproofing||V-Logger is housed in an IP68 enclosure with cable glands for signal cable. Plugs are provided for unused cable glands|
|Data Retrieval||Readings are retrieved via USB cable (standard), a serial connection (optional) or wireless link (optional)|