SKF Multilog On-Line System IMx-M, Руководство пользователя

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Protection
Measurement Types
SKF Multilog On-Line System IMx-M 2 - 21
User Manual
Radial Shaft Vibration
Radial shaft vibration (RSV) measures the vibration of the machine shaft in a direction
perpendicular to the shaft longitudinal axis by the use of a displacement sensor
(proximity probe).
Speed
Speed is a measurement of shaft rotation speed in revolutions per minute and may be
used specifically for speed measurements. However, it is also used as an input
parameter for
piston rod drop measurements and the edge of the input pulse is used as
trigger.
The measurement is derived from the measured period time of the number of pulses
configured per revolution.

The number of input pulses per revolution must be 1 when the
channel is used as trigger for Piston Rod Drop.
There is a peak speed detection function. Peak speed for a digital channel will be stored
(as events) if both of the following conditions are met:

The detected peak speed value is above alarm level

No new peak speed value is detected within 1 minute

The 1 minute delay is to avoid numerous events during
acceleration. This will also mean that the event will be generated
after 1 minute from the detection of the peak speed. The time
stamp in the event is the time of the detection.
Important: Peak speed will not be updated during slot disarm.
–
Peak speed value is available through Modbus and Event Log.
–
It is possible to reset (set to zero) the peak speed value via the local display , the
imported (write single) Modbus register and Ethernet (Observer).
Important: Reset of peak speed will reset all peak speed values within the slot.
Temperature
Temperature is measured with RTD (PT100) sensors. The measurement range is

20
to +150 °C (

4 to +302 °F )
Temperature difference measures the temperature difference between two
Temperature measurement type channels.
Verifying the accuracy of temperature measurements for FAT or similar testing requires
extremely high precision reference instruments and components as well as careful
connections and cabling. This is because 1 ºC corresponds to a resistance change of
only 0.385 ohm.
Similarly field calibration (by trained service personnel) requires careful adherence to
the procedure to achieve best results.