Endress+Hauser Liquisys M CPM223, Руководство по эксплуатации

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Liquisys M CPM223/253 Maintenance
Hauser 77
7.1.2 Dismantling of field instrument
"
Caution!
Please note the effects on the process if the device is taken out of service!
!
Note!
Please refer to the diagram in Section 9.5 for the item numbers.
1. Open and remove the cover of the connection compartment (item 420).
2. Disconnect the mains terminal (item 470) to de-energise the device.
3. Open the display cover (item 410) and loosen the ribbon cables (item 310 / 320) on the side
of the electronics box (item 330).
4. To remove the central module (item 40), loosen the screw in the display cover (item 450 b).
5. Proceed as follows to remove the electronics box (item 330):
– Release the screws in the housing base (item 450 a) in two revolutions.
– Then push the entire box backwards and remove it from above.
– Make sure that module locks do not open!
– Bend the module locks out and remove the modules.
6. To remove the docking module (item 340), remove the screws in the housing base
(item 450 c) and remove the entire module from above.
7. Proceed as follows to remove the pH/mV transmitter (item 230):
– Bend the screening plate up.
– Disconnect the connected strand (pH input, strand comes from the BNC connection jack).
– Using a fine side-cutting pliers, nip off the heads of the synthetic distance sleeves.
– Then remove the module from above.
To assemble, carefully push the modules into the trolley tracks of the electronics box and let them
engage in the side box noses.
!
Note!
• Incorrect mounting is not possible. Modules inserted in the electronics box incorrectly are not
operable since the ribbon cables cannot be connected.
• Make sure the cover seals are intact to guarantee IP 65 ingress protection.
7.1.3 Replacing the controller
!
Note!
Generally, when a central module has been replaced, all data which can be changed are set to the
factory setting.
Proceed as described below if a central module is replaced:
1. If possible, note the customised settings of the device, such as:
– Calibration data
– Current assignment, main parameter and temperature
– Relay function selections
– Limit value/controller settings
– Cleaning settings
– Monitoring functions
– Interface parameters
2. Disassemble the device as explained in the "Dismantling the panel-mounted instrument" or
"Dismantling the field instrument" section.
3. Use the part number on the central module to check whether the new module has the same
part number as the previous module.
4. Assemble the device with the new module.
5. Start up the device again and check the basic functions (e.g. measured value and temperature
display, operation via keyboard).