KROHNE IFC 050 Converter EN - Manual (Page 54)

6
OPERATION
54
IFC 050
www.krohne.com 08/2013 - 4002184002 - MA IFC 050 R02 en
C1.2 filter
C1.2.1 limitation Limitation of all flow values, before smoothing by time constant, affects all
outputs
Settings: -xxx.x / +xxx.x m/s; condition: 1st value < 2nd value
Range 1st value: -100.0 m/s ≤ value ≤ -0.001 m/s
Range 2nd value: +0.001 m/s ≤ value ≤ +100 m/s
C1.2.2 flow direction Define the polarity of the flow direction.
forwards (according to the arrow on the measuring sensor) or backwards (in
the opposite direction to the arrow)
C1.2.3 time constant Time constant of all flow measurements.
xxx.x s; range: 0.0…100 s
C1.2.4 pulse filter Suppresses noise due to solids, air/gas bubbles and sudden changes in pH.
Select:
off (without pulse filter) /
on (with pulse filter) /
automatic (with new pulse filter)
Pulse filter "on": Pulse filter "on": Pulse filter "on": Pulse filter "on": The change from one measurement value to the next one is
limited to the value "pulse limitation" for the total time "pulse width".
This filter allows a faster signal tracking for slowly changing flow values.
Pulse filter "automatic": Pulse filter "automatic": Pulse filter "automatic": Pulse filter "automatic": The raw flow values are collected into a buffer,
covering two times the "pulse width" values. This filter is called "median"
filter.
This filter allows a better suppression of pulse shaped disturbances
(particles or air bubbles in very noisy environment).
C1.2.5 pulse width Length of interference and delays to be suppressed on sudden changes in
flow.
Only available, if pulse filter (Fct. C1.2.4) is "on" or "automatic"
xx.x s; range for "on": 0.01…10 s or for "automatic": 0.1...20 s
C1.2.6 pulse limitation Dynamic limitation from one measured value to the next; only if pulse filter
(Fct. C1.2.4) is "on".
xx.x m/s; range: 0.01...100 m/s
C1.2.7 low flow cutoff Sets low flow values to "0"; affects all outputs
x.xxx ± x.xxx m/s (ft/s); range: 0.0…10 m/s (0.0...32.8 ft/s)
(1st value = switching point / 2nd value = hysteresis),
condition: 2nd value ≤ 1st value
C1.3 empty pipe detection
C1.3.1 empty pipe detect Select:
off / empty pipe [F]; empty pipe [S]; empty pipe [I]
Flow indication "= 0" when pipe is empty
C1.3.2 limit empty pipe Only available when empty pipe activated [..] in Fct. C1.3.1.
Range: 0.0…9999 μS (set about 50% of the lowest occurring conductivity in
operation. Conductivity below this value = signal as empty pipe)
C1.3.3 act. conductivity Only available when empty pipe activated [..] in Fct. C1.3.1.
Actual conductivity is indicated. Activation takes place only after setting
mode is exited!
C1.3.4 time constant Only available when empty pipe activated [..] in Fct. C1.3.1.
range: xxx.x s; 0.1...100 s
A damping is set for empty pipe detection.