Geotechnical
Instrumentation
Last updated: Dec 2011
Multi-VW
sensor Load Cell
e.g. Geokon 4900 model
Multi Channel
Vibrating Wire Sensors
The image opposite shows the basic configuration for a multi-channel
sensor instrumentation. The load cell uses 3 x Vibrating wire elements
to determine the total load and so to take a measurement 3 x VibWire-101
interfaces will be required.
The basic configuration is all that is required for direct connection of the load cell to a PC.
The image opposite shows the basic configuration for a multi-
The basic configuration is all that is required for direct connection of the load cell to a PC.
Data rate from the
VibWire-101-RS232
Unit
20 Reading/Sec sample rate (standard)
40 Readings/Sec depending on sensor
Maximum Sensor Operating Frequency to 6 KHz
20 Reading/Sec sample rate (standard)
40 Readings/Sec depending on sensor
Maximum Sensor Operating Frequency to 6 KHz
VibWire-101-RS232
Multi-port
RS-232
to USB Media Converter
Data Acquisition PC
Data Acquisition PC
RS232-Ethernet
multi-port
media converter
3 x VW sensor load cell
high-speed-vw-measurements.ppp
Large Scale Systems
Any type of Vibrating wire sensor can be scanned across a local area network using the
VibWire-101
interface connected to a suitable media converter. The example below
shows the basic configuration for both single channel and multi-channel
vibrating wire sensors connected to the LAN.
The sample rate of the VibWire-101
is controlled directly by the polling rate of the serial port of the
instrument by the software on the data acquisition system.
Any type of Vibrating wire sensor can be scanned across a local area network using the
VibWire-
The sample rate of the VibWire-
Part No.
VibWire-101-RS232
Introduction
The VibWire-101-RS232 is a high speed single channel
vibrating wire interface capable of offering both static and dynamic
measurement capability with a range of sensors. The device is fully
encapsulated and is safe for operation in the harshest of environments.
The VibWire-101-RS232
is a software controlled device so
that its sample rate can be adjusted by the User to suit the
application. The instrument offers remote control capability enabling
the sampling rates to be adjusted remotely over a network. A
dedicated monitoring system can increase and decrease the sample rate
automatically depending upon the
The VibWire-
Laptop / PC
Computer
Computer
Simple High Speed VW
Sensor
Measurements
The simplest way to undertake high speed vibrating wire sensor is to use a RS232-USB
serial converter to link the VibWire-101-RS232
directly to a laptop computer
system. The application software records the data at the desired sample
rate directly into a CSV format file for later analysis.
The simplest way to undertake high speed vibrating wire sensor is to use a RS232-
Demo Software
The demo software
supplied free
with the VibWire-101-RS232
is used to test the instrument with a specific VW sensor.
Firmware Upgrade Facility
This product supports the Keynes Controls firmware upgrade facility enabling the product features to be customised.
Firmware Upgrade Facility
This product supports the Keynes Controls firmware upgrade facility enabling the product features to be customised.
