FLOWCERT LITE (UL) INSTRUCTION MANUAL
122
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, which is established
around the processed echo and is used to track the echoes movement and
update the display. If set to
Fixed
, P880 = 0 (
Default
) then the width of the
gate is determined by the value of
P881 Fixed Distance
. When set to
Calculated,
P880=1 then the gate width is automatically calculated and
updated
according to the values of
P870, P871, P874, P875 and P876.
Please consult Pulsar for further information and assistance on changing the
value of this parameter.
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 (in excess
of 10m/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
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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