2000-OSM, F1 8-23
FILAMENT TCD REPAIR
Refer to Figure 8-10 for Filament Thermal Conductivity Detector (TCD) component location.
Sample Vent
Reference
Filament
Measure
Filament
Reference Vent
Sample In
Reference In
TC Assembly
Figure 8-10. FILAMENT TC DETECTOR
CAUTION
This repair should only be attempted by people who are properly trained and
possess the expertise for this repair.
T/C Detector Access
CAUTION
It is the customer’s responsibility to ensure that the area is safe and and hazard-
free, and will remain so the entire time the analyzer is open. This responsibility
includes ensuring adequate ventilation in analyzer shelter and obtaining proper
work permits, etc.
See “AIR PURGING” in Section 4 for the X Purge override function. Do not perform
override until you have read Section 4 completely and you understand and can
perform the procedure properly.
The filaments are fragile and can be easily damaged if not handled with extreme
care. Do not touch the end of the elements.
Caution should be used when working with a soldering iron. Safety glasses and
protective gloves should be used to protect against hot molten solder and hot
surfaces. Personal protective equipment such as goggles, face shield, lab coat
and rubber gloves should be used while cleaning with solvents such as acetone.
Cleaning with solvents should be done in a well ventilated area.
1. If power is applied to the analyzer, turn it off.
2. Turn off oven air to the Isothermal Oven and allow all temperature zones to cool.
3. Open the isothermal oven door.
Removing the Filaments
1. Use a Phillips screwdriver to loosen the two Phillips head screws located on the front underside
of the mounting bracket.
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