Bently Nevada 990/991 Test Adapter

• Small size and weight for portable operation
• Battery or ac adapter power options
• Automatic shutoff powers down when the battery is low
• 2 channels, display an orbit for XY probe configurations

The Bently Nevada 990/991 test adapter inverts and isolates the PROX OUT signal from the 990 vibration transmitter so that you can connect 990
transmitters to ac-powered diagnostic equipment. The adapter modifies the PROX OUT signal so that it matches our standard Proximitor sensor signals
by performing these functions:

• Shifts the phase of the PROX OUT signal by 180º by changing the voltage from positive to negative
• Isolates the transmitter from diagnostic equipment so that equipment with different grounds will not affect the transmitter’s 4-20 mA loop signal
• Reduces noise in the surrounding area from affecting the PROX OUT signal