Siemens Maxum II Service Manual page 14

Thermal Conductivity Detector
2.2 Replacing TCD Components
Removing the IS TCD DPM
See the illustration IS TCD DPM Connector Locations for connector locations.
1. Back up and shut down the unit using the
Maxum Edition II Analyzer General Maintenance Manual .
2. Open the electronics enclosure door.
3. Disconnect the detector cables by unplugging the orange connectors.
4. Disconnect the I
5. If present, take out screws holding the IS ground cables.
6. Remove the nut on the bottom-front of DPM bracket.
7. Slide the unit forward to disengage the rear mounting lug.
8. Lift the unit up and out of the enclosure and place on an ESD-safe work surface.
9. Remove the two mounting screws near the upper corners and remove the old unit from the
DPM cage.
Configuring the New IS TCD DPM
Set the location ID switch and reference-selector switches on the replacement unit to match
those on the unit being removed.
Note
For the reference-selector switches, the IS TCD4 DPM uses slide switches in place of the 2-
position rotary switches on older units. The function is the same.
Installing the Replacement IS TCD DPM
1. Install the new unit into the DPM cage. Insert the bottom edge into the slot in the plastic
DPM mounting rail on the DPM cage, and secure with the two screws removed from the
old unit.
2. Insert the rear lug into the slot at the rear of the DPM mounting position with the mounting
stud at the front inserted through the slot in the DPM bracket.
3. Slide backward to lock the rear mounting lug into the slot.
4. Reinstall the nut on the threaded stud to secure the DPM.
5. Reconnect the I
6. Reconnect the IS ground cables if used.
7. Reconnect the detector cables.
8. Follow the steps in the
Analyzer General Maintenance Manual .
14
C/power cable.
2
C/power cable.
2
General Analyzer Startup Procedure in the Maxum Edition II
General Analyzer Shutdown Procedure in the
Service Manual, May 2018, A5E42019847001
Maxum Edition II Detectors