FISCHER PRO-LINE DE90 - Page 72

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72 BA_EN_DE90
5.5.3.3.2 Characteristic C3 (dynamic filter monitoring)
Directory: \Configuration\Channel 3\Characteristic C3
Level: 3
Characteristic C3
1 2 3 4
Displ.range C3 start
Displ.range C3 end
Channel ∆p
Channel Q
U
A
A
Fig.101: Characteristic C3 (dynamic filter monitoring)
Menu name Description
Displ.range C3 start This parameter defines the beginning
of the display range.
Displ.range C3 end This parameter defines the end of the
display range.
Channel ∆p A This parameter defines the channel for
differential pressure measurement at
the filter.
Channel Q A This parameter is used to define the
channel for volume flow measurement.
Approximation A This parameter defines the approxim-
ate formula for the volume flow meas-
urement.
∆p clean This parameter defines the limit value
for the clean filter.
∆p soiled This parameter defines the limit value
for the dirty filter.
∆p correction value This parameter can be used to set an
offset for the characteristic curve.
Max. volume flow This parameter determines the upper
limit value for the volume flow.
Min. volume flow This parameter determines the lower
limit value for the volume flow. The
measured value is 'frozen' when the
volume flow falls below the limit value.
Back E This represents the output (exit) of the
menu. This takes you back to the
Channel 3 menu..
Measurement point 1
1 2 3 4
C1 C2
C3
28
3165
m
139.3
%
kPa
U
3
/h
<
Indicator
Fig.102: Frozen Display
Frozen display
With the parameter Min. volume flow defines the lower limit for the filter
monitoring. The measured value for the soiling is frozen as soon as the volume
flow falls below this limit. This state is indicated in the display by the character
< next to the measured value for the degree of soiling.