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Stability Parameters
Damping
Damping is used to damp the display, to enable it to keep up with the process
but ignore minor surface fluctuations.
P870 Fill Damping
This parameter determines the maximum rate at which the unit will respond
to an increase in level. It should be set slightly higher than the maximum
vessel fill rate.
Default = 32.8084 feet/minute
P871 Empty Damping
This parameter determines the maximum rate at which the unit will respond
to a decrease in level. It should be set slightly higher than the maximum vessel
empty rate.
Default = 32.8084 feet/minute
Filters
The following two parameters can be used to filter out unwanted changes of
level caused by a ‘rippled’ or agitated surface.
P881Fixed Distance
This parameter determines the width of gate to be used in tracking an echo
and under normal circumstances will not require changing, but it can be
increased in the cases where the surface is moving extremely fast (in excess
of 32.8084 feet/min) to ensure smooth processing of the changing level.
P882 Process Filter
This parameter determines the number of ‘cycles’ that will be taken before a
change in level is processed and the display updated.
Option
Description
1 = Fast
level will be updated every cycle
2 = Medium
level will be updated every 8 cycles
3 = Slow (Default)
level will be updated every 16 cycles
