8 x Full 4 Wire Vibrating Wire Sensor Inputs
Thermistor / 0- 2.5V dc / 4-20 mA loop Analogue Inputs
Analogue outputs for Vibrating Wire & temperature
Supports upto 80 channels on SDI-12 networks
Connects to any analogue data logger or acquisition system
On-board Frequency Display
Integrated Power Supply Monitoring
Gas Discharge Lightening Protection all inputs
Individually configurable sensor inputs
Solid state speaker
Advanced Power Management < 3mA Standby Mode
100 Hz - 10 K Hz sensor range
Compatible to Electro-level sensors
The VibWire-108 is the most basic of the Keynes Controls vibrating wire interface family of products containing only the analogue output channels for connection to a data acquisition system or analogue logger unit.
The instrument contains all the other standard features of the VibWire range such as on-boar frequency display, gas discharge sensor protection and on-board speaker. Each of the sensor inputs are individually configurable
The Vibrating wire excitation circuit automatically follows the resonant frequency of the sensor and so uses only the minimum amount of energy to activate the sensor and so reduces the wear on any attached device. The instrument also contains jumper configurable analogue inputs that are used to read the vibrating wire temperature compensation sensor, 4-20 mA inputs or 0 - 2.5 V DC inputs.
The 2.5 V DC inputs have been optimised to use the TS-103 electro-level interfaces enabling tilt sensors to be attached to the instrument and the levels digitised as part of the VibWire-108 sensor scan operation.
An analogue output representation of the sensor signal is used to connect to the external data acquisition system and is level is held at the appropriate level and only changes after the next scan of the instrument should a new sensor level be detected.
All instruments supplied with
protective covers
protective covers
Vibrating Wire
Sensor
Sensor
Thermistor
3.3 K Ohm
3.3 K Ohm
0-20 / 4-20 mA
Loop
Loop
0 - 2.5 V DC
Analogue Signal
Analogue Signal
Electro-level
Sensor
Sensor
Data Logger
or
Acquisition System
or
Acquisition System
TS-103 Electro-level Signal Conditioning
System Diagram - Sensor & Analogue Input Connections
For current loop inputs sense resistor has to be fitted.
Full details of the jumper settings used to configure the inputs are located in the product manual.
By default the temperature compensation circuit assumes a 3.3K ohm thermistor is used within the vibrating wire sensor.
Keynes Controls assumes that the data logger or acquisition system provides suitable