KROHNE IFC 110 Converter - Manual (Page 83)

Part C Special applications, functional checks, service, and order numbers Sect. 8.4
05/2003 IFC 110 F 83
8.4 Replacing single printed circuit boards (PCBs)
Switch off the power supply before opening the housing.
1) Remove the cover from the terminal compartment (remove 2 screws).
2) Pull all cables out of the plug-in terminals.
3) Remove the glass cover from the control compartment (remove 4 screws).
4) Remove 4 screws from the front panel F, take hold of the handle on the upper end of the
front panel and carefully pull the complete electronic unit out of the signal converter housing.
5) Put down the electronic unit with the front panel F facing down.
6) Remove screw(s) S
LP
from the PCB(s) to be replaced and carefully pull the PCB(s) out of the
plug base(s). Fit new PCB(s), refer to the illustration in Sect. 8.3 (preceding page).
• When replacing the PCBs FSV and/or ADC, always remove both PCBs together as
they have a common plug-and-socket connector.
• When replacing the ADC PCB, carefully move the data EEPROM IC 14 from the old to
the new PCB and observe the direction of the IC during plugging. After changing the
EEPROM from the old to the new electronic unit, no further adjustments or settings are
required. Refer to the illustration in Section 8.7.
7) Re-assemble in reverse order (items 6 - 1 above).
8.5 Replacing the flow sensor
Switch off the power supply before beginning work.
1) Before removing the ”old” flow sensor please note down which cable is connected to which
terminal.
2) Install the new flow sensor as described in the installation instructions supplied with the
instrument.
3) Electrically connect the flow sensor to the signal converter as described in these installation
and operating instructions, see Sections 1.3.5 and 1.3.6.
4) During factory calibration, specific calibration data are determined for each flow sensor which
are indicated on the instrument nameplate. These data include the primary constant GK and
the magnetic field frequency which must be reset in Fct. 3.02 FLOW METER, subfunctions
”GK VALUE” and ”FIELD FREQ.”, see Sections 4.4 and 5.13.
5) If the meter size of the flow sensor has changed, also reset the full-scale range Q
100%
and
the meter size in Fct. 3.02 FLOW METER, subfunctions ”DIAMETER” and ”FULL SCALE”,
see Sections 4.4 and 5.13.
6) Perform zero test as described in Section 7.1 after the signal converter is reset.
7) Reset the internal electronic totalizer of the signal converter as described in Sect. 4.6 if
necessary.
8.6 IFC 110 F replacements for old KROHNE signal converters
The IFC 110 F can replace all older KROHNE signal converter versions:
TIV 60 F / T 900 F / SC 100 A/F / SC 100 AS/F
This also applies to systems up to the size of DN 3000 / 120” that are operated with a power
driver. Such replacements are delivered together with any new wiring diagrams and additional
instructions for installation and setting of the IFC 110 F. You are kindly requested to comply with
these instructions.