Protection
Protection Module Configuration with IMx-M Manager
SKF Multilog On
-Line System IMx-M
2 - 153
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 Piston Rod Drop chapter.
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 mode 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
µ
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.