4 Channel Voltage Source Amplifier • Input Range 1/31.6/100mV/g • Gain adjustable • Integrated Accelerometer PSU 
For Technical Data and Schematics
IEPE Accelerometers feature an integrated QVC, converting the charges output from the piezoelectric sensor to a voltage, driving a low impedance voltagel superimposed on the supply line. Where the signal levels are adequate then minimal instrumentation is required to interface with the Accelerometer.
The V4/04 Voltage Source Amplifier is a four channel space saving solution to amplifying the signals from multiple accelerometers. It includes the QVC constant current power supply required by IEPE Accelerometers, and open/short circuit indicatiors. The Instrument also features normalising and range amplifiers.
A coaxial lead is sufficient for connecting the accelerometers with the V4/04.
IEPE Accelerometers are immune to supply voltage noise but have limited line drive capability as connecting lead capacitance presents a reactive load. Where signal level is adequate, the minimal interface shown inthe datasheet of the indivial accelerometer will suffice. However, the V3/04 adds gain, calibration and monitoring enhancements to the measurement system, improving dynamic range and ease of use.
The normalising section provides an output of 100mV/g for transducer/QVC sensitivities within the range 1/110mV/g by means of a three decade digi-switch and x1/x100 multiplier switch directly set to transducer sensitivity.
Features
- Integrated PSU for driving Accelerometers.
- Fault and overload detection.
- Adjustable gain over the range x1 to x100 in 10db increments.
- 4 input channels.