990 Test Adaptor


The 990 test adapter inverts and isolates the output signal from 990, 991 and Seismic Transmitters, allowing you to interface our Bently Nevada transmitters to AC-powered diagnostic equipment (such as ADRE®, oscilloscopes, and portable data collectors) while providing a high input impedance. The adapter inverts the phase of the “Prox Out” signal 180 degrees (to match standard vibration signals), isolates the test equipment output from the transmitter to prevent ground loop problems with the 4-20 mA current loop, and reduces the noise susceptibility of the transmitter dynamic output signal.