ULTRA 4 INSTRUCTION MANUAL
168
P878 Lower Cutoff
This parameter is used to select the minimum Rate to be calculated and can
be used to eliminate unwanted updates from effects of ripples/waves on the
surface of the material.
Filters
The following three parameters can be used to filter out unwanted changes
of level caused by a ‘rippled’ or agitated surface.
P880 Gate Mode
This parameter determines the operation of the gate that is established
around the echo being processed and is used to track the echoes movement
and update the level measurement indication on the display. Please consult
Pulsar for further information and assistance on changing the value of this
parameter, Default = 0 (Fixed).
P881 Fixed 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 (more than
10m/min) to ensure smooth processing of the changing level.
Default = 0.2m
P882 Process Filter
This parameter determines the response time of the measurement
P884 Peak Percentage
This parameter is used if you choose a solids application, P102 Material = 2
(Solids), where there maybe angles of repose on the material, and can be
used to determine where in the returned echo the displayed level is.
Default = 50%
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