Keynes Controls VibWire-108 User Manual

Introduction
The following document details the model types, configuration
and operational features for the Keynes Controls VibWire-108
range of vibrating wire sensor interface.
The VibWire-108 units contains 8 x 4 wire sensor inputs and The
sensor interface consists of two inputs, one for the vibrating wire
sensor and the other for temperature/analogue input.
This document shows all the different hardware configurations and
User options available for the operation of the instrument.
All instruments are supplied with on-board frequency display and
a speaker also with or without analogue output ports.
Hardware Options
VibWire-108-RS485 RS 485 serial comms unit
VibWire-108-SDI12 SDI-12 serial comms unit
VibWire-108 Analogue Output
.
Instrument Scanning Operations
The VibWire-108 is a multiplexed instrument and as such scans
each channel before working out the sensor frequency and moving
on to the next channel. Only after all of the sensor inputs are
scanned are the results made available for data transmission across
the various communications networks or analogue output interface.
Configuration
The only time the sensor inputs require any configuration is when
the analogue output channels are to be used. For SDI-12 and
RS485 the sensor inputs operate automatically.
Real-time Operations
The VibWire-108 can be set to operate in real-time mode with the
real-time display operating on a single channel only. This is ideal
for testing and setting up sensors as any adjustment to the sensor is
instantly shown on the display.
Power Consumption
All of the VibWire systems use advanced power management
operations to minimise the power consumption and so make the
instrument ideal for stand-alone remote applications. Power
requirements are:
Power Supply
Scanning mode:
Display mode:
SDI-12/RS485 network:
Analog output mode:
Solar Panels
11-18V DC @ 0.25A
70mA aprox 30 seconds / scan
90mA continuous
Waiting for command 20mA continuous
25mA continuous
4.8W cell gives 1 Reading /Hr indefinitely
VibWire-108
Vibrating Wire Sensor Interface Unit
User Manual Version 1.05 - Otcober 2008
Keynes Controls Reserves the right to make changes without notification. Refer to
the network drawing for details of the electrical connections.
Field Operations
There are various VW-108 models available offerings cable free,
GPRS modem, SDI-12/RS-485 serial port communications and
analogue outputs. All instruments no mater the model contain an
on board frequency display, ceramic speaker and User keyboard.
In order to ensure that the VibWire-108 systems operate as reliably
as possible they all contain lightening protection on sensor inputs
and isolated serial ports for digital data transmission.
The VibWire-108 series of instruments support everything needed
to make and report accurate vibrating wire sensor readings and also
to act as local display and diagnostic tool and report data across all
of the most common communication interfaces and data
transmission networks.
Fully Integrated Data Logger
The VibWire-108 has been fully integrated to the Keynes Gateway
data logger and communications interface. The Gateway can act as
a communications interface for connecting the VibWire-108 to
range of cable free networks such as GPRS and ZigBee. The
Gateway also supports USB data stick recording making it ideal for
fixed site recording.
The Gateway also controls the power management for the
VibWire-108 and switches off any third party equipment when not
in use to minimise systems power requirements.
Photo VibWire-108