KROHNE ALTOFLUX 2W IFM 4042K EN - Manual (Page 30)

Section 4.4 Part B IFC 040 Signal converter
ALTOFLUX 2W 02/2001
30
Display texts Description and settings
FCt. 3.4
APPLICATION
→
Application = set characteristic of measuring point
inFo
emPtY PiPe
↵
Pipe/tube has run dry
Edit
YES
↑
NO
Standard: Yes
↵
The empty pipe identifier can be switched on (YES) and off
(NO). A load-independent current of approx. 25nA flows
continuously from the electrodes to ground (pipeline /
grounding rings). If this current can no longer flow, and the
empty pipe identifier is activated, the measured value is set to
zero and an error message is enabled (see Fct. 1.4, setting of
“Display messages"). If not required, deactivate the empty
pipe identifier (=NO).
inFo
Field current
↵
Field current
Default value for maximum allowable field current.
Edit
100-50-25mA
50-25mA
↑
25mA
Standard: 100-50-25mA
↵
If the available energy is not sufficient for the set maximum
field current, automatic reduction to the next lower value.
Where flow is pulsating, it is advised to reduce the field
current from 100mA
pp
(setting: 100-50-25mA) to 50mA
pp
(setting: 50-25mA). Above approx. 10-20% flow, continuous
measurement is then present.
inFo
ModuS F.current
↵
F current mode
Edit
two timeS
↑
three timeS
Standard: two times
↵
•
The double setting is standard
(follows flow at a faster rate),
•
The triple setting reduces strong interference
(e.g. from solids contents).
inFo
limit
↵
Limitation
Edit
150 Perc.
300 Perc.
↑
1000 Perc.
Standard: 150 %
↵
1 150% setting is standard,
2 300% and 1000% settings (advisable with pulsating flow
or low conductivity),
all as percentage of full-scale value, see Fct. 1.1.
Please note:
3
if noise filter used (see following function), set limitation
to 1000%.
4 Do not increase limitation if process liquids contain
solids.
inFo
Filter
↵
Filter
Edit
Filter off
PulSe Filter
↑
noiSe Filter
Standard: filter off
↵
•
Filter ‘off’ setting is standard,
•
Noise filter if conductivity is low
(for characteristic, see Fig. 6 in Section 2.3)
•
Activate pulse filter if solids contents or other pulsed
interference involved
(for characteristic see Fig. 7 in Section 2.3).
Please note:
Further settings are required when pulse filter or noise filter is
activated, see below: