System Description
The TXR/TXA series of transmitters consists of two systems, the TXR, Radial Vibration Transmitter
System and the TXA, Thrust Transmitter System. Both systems contain three parts – a proximity
probe, a matched extension cable and a transmitter. Both systems provide a 4 to 20 mA current loop
output signal.
The TXR Vibration Transmitter System measures the radial vibration of a shaft or other part of a machine
in relation to the location of the probe tip. The following equation represents the relationship
between the vibration and the loop current.
The TXA Axial Thrust Transmitter System measures the distance between the target and the probe
tip. The following equation represents the relationship between the target’s relative position and the
loop current.
Both transmitters provide a voltage proportional to the distance between the target and the probe tip.
This voltage is available as a buffered output on the BNC connector for use when gapping the probe
and for diagnostic purposes. You may apply this voltage to any battery-powered or ground isolated
instrumentation with a 1 Megohm or larger input impedance.
The amplitude of the output signal is +200 mV/ mil. The amplitude of a system using an 11 mm
probe is 100mV/mil.
The Dynamic Output signal is buffered however, due to the limited current available on the loop; the
DYNAMIC OUTPUT reading will be attenuated by instrumentation with an input Impedance of less
than 1 megohms, see Graph 1.
(Current (mA) - 4)
Vibration = 16 X (Full Scale Range)
(Current (mA) - 4)
Absolute Distance = 16 X (Range) + 20
(Current (mA) - 12)
Relative Distance to 50 mils gap = 8 X (Range / 2)
For 5mm & 8mm probes the range = 60 mils and 11 mm probes the range = 140 mils
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隐藏对比框