KROHNE IFC 010 Converter EN - Manual (Page 39)

6/2
Stable signal outputs when measuring tube empty 6.2
Output signals can be stabilized to values as for “zero” flow to prevent random output signals
when the measuring tube is empty or when the electrodes are not wetted in the event the
measuring tube is partially full.
Display: 0
Current output: 0 or 4 mA, see setting in Fct. 1.05.
Pulse output: no pulses (= 0 Hz), see setting in Fct. 1.06.
Precondition: - electrical conductivity of product
≥
200 µS/cm (µmho/cm),
≥
500 µS/cm for meter sizes DN 10 - 15 and 3/8“ - 1/2“
- length of signal cable
≤
10 m /
≤
30 ft and free of vibration at field
signal converter
- process products are homogeneous, free from solids and gas inclusions,
and do not tend to cause electrical or catalytic reactions.
Changes on amplifier PCB, see illustration in Sect. 8.9.
Switch off power source before opening the housing !
Refer to Sect. 8.5 for Fig. A, B and D.
1) Unscrew the 4 recessed head screws (Fig. A) and remove transparent cover.
2) Unscrew recessed head screw (Fig. B) and remove black plastic cover.
3) Unscrew the 2 recessed head screws (Fig. D) and remove black metal cover.
4) If display unit provided, unscrew the 4 recessed head screws and fold display carefully
to side.
5) Join the two “semicircles” of points S3 and S6 on the amplifier PCB with tin solder,
see figure in Sect. 8.9.
6) Reassemble in reverse order, Items 4) to 2) above.
7) Switch on power.
8) Check setting of the low-flow cutoff SMU, Fct. 1.03, and reset if necessary:
L.F.CUTOFF switched on, range:
Operator control:
Display Version: (D), see Sect. 4 and 5.3, Fct. 1.03
Basic Version: (B), see Sect. 6.1.
9) After checking and/or resetting, replace transparent cover and tighten down the 4 recessed
head screws.
Full scale range Q
100%
Cutoff ...... values
... OFF ... ... ON ...
> 3 m/s > 10 ft/s > 0 2 % 1 %
1 - 3 m/s 3 -10 ft/s > 0 6 % 4 %
< 1 m/s < 0 3 ft/s >10 % 8 %