KROHNE ALTOFLUX IFM x080 K ATEX EN - Manual (Page 25)

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 25
5.2 Replacement of electronics unit
A
A
Display unit of IFC 090…-EEx
Refer to the standard Installation and
Operating Instructions for detailed
information about resetting and
reprogramming the new electronics unit
after replacement. The customer
specific data (like the value of the
internal totalizer) are stored in
DATAPROM IC-18, which must be
transferred from the "old" to the "new"
electronics unit. See Sect. 8.7 of the
standard Installation and Operating
Instructions for detailed information.
Before commencing work, note the instructions in Sect. 5.1 ("Before opening").
Then continue as follows:
1. Remove the display cover of the electronics compartment.
2. Unscrew the two screws A (M3) of the display unit (see figure 10) and turn it carefully aside.
3. Disconnect the 2-pole field circuit connector (item B in figure 9) and the 3-pole electrode circuit
connector (item C). See figures in Sect. 5.1 and the following.
4. Unscrew the two mounting screws D of the electronics unit and unscrew SE, which fixes the
copper ground strip to the back of the housing. A screwdriver with a long shaft (
≥
200 mm) is
most suitable for unscrewing screw SE (e.g. screwdriver type Philips No. 2).
5. Carefully remove the electronics unit of the converter housing (see the remark below).
6. Check if the voltage setting (only applicable for AC power supplies) and power fuse rating are
correct on the new electronics unit. If necessary, change the voltage setting or replace the
power fuse (see Sect. 5.3 and 5.4 of this manual).
7. Carefully insert the electronics unit (keep cables aside, see remark below). Then mount the unit
completely into the housing and fix the screws. First the two screws D, then screw SE and
reconnect the 2-pole field circuit connector B and the 3-pole electrode circuit connector C to the
right counter-plugs on the electronics unit (see figure in Sect. 5.1).
8. Finally screw the display unit back on the frame of the electronics via the two screws A.
9. Screw the cover of the electronics compartment back into the housing.
Note the instructions of Sect. 5.1 ("After opening") during reassembling.
IMPORTANT !
Carefully keep the connecting cables of the field coil and electrode circuits to
the side of the housing, while removing respectively inserting the electronics
unit into the signal converter housing. This is to prevent damaging of the
connecting cables!