28302B Dual Vibration Amplifier for Rotation Machinery

The Precision 28302B Dual Vibration Amplifier is designed to condition signals from rotating machinery. The card accepts inputs from single-ended or differential piezoelectric accelerometers, IEPE accelerometers or remote velocity sensors.

Fixed AD and DC sensitivities are provided in engineering units to represent either acceleration, velocity, or displacement. Programmable high-pass and low-pass filters remove unwanted out-band signals from the acceleration and velocity outputs. The 28302B provides simultaneous buffered AC outputs for acceleration, velocity and displacement, as well as, one DC output for acceleration, velocity or displacement.

The 28302B provides two channels per card with up to 32 channels in a single 28000 system chassis or mix with other 28000 signal conditioning card. Control of all 28000 system cards is via the Ethernet or via the 28000 graphical user interface resident on a host computer.

28302B Dual Vibration Amplifier Features

Two channels per card, 32 channels per 28016 chassis
16 channels per 28008 chassis
Isolated or grounded single-ended Piezoelectric input
Balanced differential Piezoelectric input
IEPE input with IEPE power
Remote charge converter (RCC) input w/IEPE power
Remote velocity sensor input
Five filtered AC outputs: two acceleration, two velocity and one displacement
One DC output: acceleration, velocity or displacement
Programmable alarm level with relay contact output senses acceleration, velocity or displacement levels
Internal shunt calibration capacitors with 0.1% accuracy
Two overload detectors (Pre-filter, charge converter and displacement out)

28302B Single Channel Block Diagram

Click to enlarge

Download the Spec Sheet from the Reference Library

Related 28000 cards for rotating machinery testing:

For dynamic strain conditioning, the 28454A Quad Conditioner with Balanced Current Excitation accommodates single arm static or dynamic strain gages, RTDs or other 2-wire or 4-wire resistive transducers that require constant current excitation.

For RPM measurements, the 28524 Quad Frequency-to-Voltage Converter Module provides conditioning for pulse, rate and frequency transducers.