Campbell Scientific CDM-VW300 Series Dynamic Vibrating-Wire Analyzer System - Manual (Page 20)

CDM-VW300 Series Dynamic Vibrating-Wire Analyzers
Operating temperature
Standard: –25° to 50°C
Extended: –55° to 85°C
Power requirement
Voltage: 9.6 to 32 Vdc
Typical current drain
CDM-VW300: 115 mA @ 12 Vdc
CDM-VW305: 190 mA @ 12 Vdc
Output
CPI: Connects to datalogger. Baud rate
selectable from 50 kbps to 1 Mbps.
Cable length varies depending on
baud rate, number of nodes, cable
quality, and noise environment.
2500 ft maximum.
USB: Connects to PC. USB 2.0 full speed.
Provided for configuration, updates,
and communication with DVWTool
software. The USB port does not
support collection of time-series
data.
Weight: < 1 kg, < 2 lb
Dimensions: 20.3 x 12.7 x 5.1 cm (8 x 5 x 2 in)
Mounting: One-inch grid. Optional DIN rail
mounting is available using
Campbell Scientific pn 29388.
1 SC-CPI module connects to terminals C1, C2, C3 (not SDM-C1, SDM-C2, SDM-C3).
2 CR3000 is the recommended datalogger.
3 These rates available only on PC with fast processor using USB cable in lab mode.
4 The effective resolution (precision) of the output is limited by noise and varies with the sample
rate.
5 Typical values for a 2.5 kHz resonant sensor.
6 Thermistor accuracy and resistance of the wire should be considered as additional errors.
6. Installation
The CDM-VW300 system is designed for use with a PC or as part of a field
data-acquisition system using a Campbell Scientific CR3000 datalogger.
When sensors are sampled at slower rates equal to or less than 50 Hz, a
CR1000 or CR800 datalogger can be used.
Pre-configure and test the system before taking it to the field. Issues that are
unresolved before placing instrumentation in the field will usually be more
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