Protection
Protection Module Configuration with IMx-M Manager
2 - 160
SKF Multilog On-Line System IMx-M
User Manual
Piston Rod Drop (PRD)
The PRD measurement is used to monitor the piston rider band wear to avoid the
piston touching the cylinder lining. See also
In this example a pair of analog channels and their associated combined measurement
are configured for PRD. The associated digital channel is configured for Speed
measurement to provide speed information and measurement trigger.
Note
: This example considers the triggered mode but can easily be applied to the
average m
ode by ignoring the “start angle” and “stop angle”.
Configuring an Analog Channel Pair
Edit an analog channel by setting the
Type
to Piston Rod Drop (Triggered
mode), the Engineering Units (
EU
) to
m, and check the “Use Combined
Measurement”.
Figure 2 - 127.
Initiating a Piston Rod Drop Channel.
For this example, the PRD channels will be configured as shown in the figures
below.
Enter sensor parameters, measurement window angles, physical parameters
of the piston rod, and piston rod offset compensation. The warning triangle
informs that the paired channel (Ch2 in this example) must be configured the
same way because the combined measurement is activated.
