8.5.2
Dismantling of CLM 253
• Open and remove the connection
compartment cover (item 420).
• Pull off the power connection terminal (item
470) to de-energize the instrument.
• Open the display lid (item 410) and
remove the ribbon cables (item 310 / 320)
on the side of the electronics box (item
330).
• Removal of central module (item 40):
Loosen the screw (item 450b) in the
display lid.
• Removal of electronics box (item 330):
Unscrew screws (item 450a) in bottom of
housing 2 revolutions, then slide entire box
backward and remove towards the top.
Make sure that the module catches do not
come unlatched! Bend the module latches
outward and remove the module(s).
• Removal of docking assembly (item 340):
Remove the screws (item 450c) in the
bottom of the housing and remove the
entire assembly towards the top.
8.5.3
Assembly of CLM 253
• Insert the module(s) in the electronics box
guide rails carefully and latch into the
lateral lugs in the box.
• Incorrect assembly is not possible!
Modules inserted in the electronics box
incorrectly are not operable since the
ribbon cables cannot be inserted.
• Make sure that the cover gaskets are intact
since they are required to guarantee
protection class IP 65.
8.5.4
Spare parts for CLM 253
Item
Designation
Name
Function
Order number
15
Power supply unit
LSGA
100/115/230 V AC
51500317
20
Power supply unit
LSGD
24 V AC + DC
51500318
290
Relay module
LSR1-2
2 relays
51500320
300
Relay module
LSR1-4
4 relays
51500321
40
Conductive central module
LSCH-S1
1 current output
51501210
50
Conductive central module
LSCH-S2
2 current outputs
51501212
60
Conductive central module
LSCH-H1
1 current HART
51501213
70
Conductive central module
LSCH-H2
2 current HART
51501214
80
Conductive central module
LSCP
Profibus PA / no current outp.!
51501215
40
Inductive central module
LSCH-S1
1 current output
51501216
50
Inductive central module
LSCH-S2
2 current outputs
51501218
60
Inductive central module
LSCH-H1
1 current HART
51501219
70
Inductive central module
LSCH-H2
2 current o HART
51501220
80
Inductive central module
LSCP
Profibus PA / no current outp.!
51501221
240
Conductivity transmitter
MKIC
Cond. + temp. input
51501206
370, 410,
420, 430
Housing cover assembly
Display lid, connection
compartment cover, front
membrane, hinges
51501068
400, 480
Housing bottom (mechanical)
Bottom, cable glands
51501072
330, 340,
450
Internal housing parts
Docking assembly, empty
electronics box, small parts
51501073
310, 320
Ribbon cables
2 ribbon cables
51501074
430
Hinges
2 pairs of hinges
51501069
470
Power supply terminal strip
Terminal strip, 2-pin
51501079
403
PE terminal strip
PE and screen connections
51501087
LM253E08.CHP
Liquisys M CLM 223 / 253
Diagnosis and corrective maintenance
Hauser
63