EPRO MMS6140 Monitor

MMS6140 is a dual-channel absolute shaft vibration monitoring module produced by EPRO, which is part of the MMS6000 machine monitoring system. This module is used to monitor the shaft vibration status of various rotating mechanical equipment to ensure the normal operation of the equipment and extend its service life.

The MMS 6140 dual-channel monitor has been designed for the use with two different transducers. Channel 1 operates with eddy current sensors and channel 2 with seismic or piezoelectric sensors.

Each measuring channel can operate separately or the results of both channels may be used to calculate the difference. By means of calculating the difference of these signals, the absolute shaft vibration results.

At the MMS 6140 monitor the relative shaft vibration is measured with an eddy current sensor and the absolute bearing vibration with a seismic or piezo-electric sensor.

The phase shift between the signals, caused by the different measuring principles, is compensated by the electronics. In the following, the bearing vibration signal is subtracted from the shaft vibration signal. The time signal arising thereof is then processed like a normal vibration signal, converted to a characteristically value according to the configuration parameters, output as current signal and supervised on limit exceedings (see fig. right)

The measurement of absolute shaft vibrations serve the construction of turbine protection systems. They provide signals for analysis and diagnosis systems to be further processed in field bus systems and networks.

Such cards of the MMS 6000 family are suitable to build up systems for increasing performance, efficiency and safety of operation and to extend the machines' life times. Application fields of the epro measuring amplifiers are steam, gas and water turbines, compressors, fans, centrifuges and other turbo machinery.

Measuring modes:

Requirements on configuration PC:

Configuration of modules is made via the RS 232 interface on the module front or via the RS 485 bus by means of a computer (laptop) with the following minimum specifications:

Processor: 486 DX, 33 MHz

Interfaces: one free RS 232 interface (COM 1 or COM 2) with FIFO type 156550 UART

Capacity of hard disk: min. 5 MB

Required working memory: min. 620 KB

Operating system: WIN^® 98, NT 4.0 oder 2000

TNT,DHL,FEDEX,UPS etc.