AUX E&H Series Instrucciones de operaciones Pagina 71

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8.2.2 Disassembly of CPM 223
Consider potential effects on process
when removing the instrument from service!
First pull off the terminal block
(Pos. 422 b) on the rear side of the device,
to make the device voltage-free.
First pull off the terminal blocks
(Pos. 422 a and if necessary 430) on the
rear side of the device, to make the device
voltage-free.
Press the latches of the end frame (Pos.
340) inwards and pull off the frame towards
the rear.
Loosen the special screw (Pos. 400) by
turning it counterclockwise.
Remove the complete electronics block
from the housing. The modules are
plugged together mechanically and can be
easily separated:
- Simply pull processor/display module
forwards
- Pull flaps on the back panel gently
outwards, the lateral modules can then
be removed.
Dismantling the pH/mV Transmitter
(Pos. 230):
Bend the screen plate upward
Pull off the stranded wire (plug-in
connection; pH input from BNC socket),
then pull off the module towards the top.
8.2.3 Assembly of CPM 223
Reverse the dismantling sequence for
assembly.
Hand-tighten the special screw without
using a tool.
Incorrect assembly is not possible!
A module block which has been plugged
together incorrectly cannot be inserted into
the housing.
PM253E08.CHP
Liquisys M CPM 223 / 253 Diagnosis and corrective maintenance
Endress+Hauser 69
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