BUCHI DuMaster D-480 - Manual (Page 214)

Operation Manual D-480 ©BÜCH Labortechnik AG
8 - Maintaining the instrument 214
Removing the quartz glass bridge
Process
The section is divided into the following phases:
 Preparing the instrument, gas pressure
 Removing the quartz glass bridge
Furnace area
The following picture shows the furnace area in detail:
Legend:
1 Quartz glass bridge
Phase 1, Preparing the instrument, gas pressure
Safety instruction
Strictly observe the safety instruction "Gas pressure" under Warning notes during operation (on
page 24).
To prepare the instrument for maintenance work follow the instructions in Preparing and following
up maintenance work (on page 171).
Phase 2: Removing the quartz glass bridge
Proceed as follows:
 Open the front door.
 Remove the heat cover on the quartz glass bridge under the furnace.
 Remove the ground-in clamps from both the combustion and post combustion tube (bottom side)
while holding the quartz glass bridge.
 Detach the quartz glass bridge and place it on a non-combustible surface.
 Protect the hot quartz glass bridge from unauthorized access.
Cleaning and installing the quartz glass bridge
What contaminations are possible?
 Black residue (tar) indicate poor combustion and incorrect O
2
dosing.