Endress+Hauser Analytik Jena multi EA 4000, Operating Manual

Page: 116 / 151

Maintenance and care multi EA 4000
116
1 Forked clamp
2 Connection for oxygen supply
3 Connection for argon
1. Switch off the basic device from the mains switch,
pull the mains switch out of the outlet and discon-
nect the gas supply.
2. Pull the gas olive out of the sulfuric acid container.
When using the safety container:
Pull the black hose off the bypass of the sulfuric acid
container.
3. Hold the sulfuric acid container, remove the forked
clamp (1) and detach the spherical joint connection
between the gas outlet of the quartz tube and the
sulfuric acid container.
4. Carefully remove and empty the acid container.
5. Pull the gas hose off the gas inlet connection of the
quartz tube (2).
When using the flame sensor: Unscrew the flame
sensor
→
(see section "Connecting the flame sensor
(optional)" p. 83).
6. Detach the union nut at the argon connection of
the gas sluice (3) and pull off the hose.
7. Hold the gas sluice and carefully pull the quartz
tube out of the combustion tube.
8. Unscrew the hexagon socket screws and dismantle
the gas sluice.
9. Remove the quartz wool from the tube with a hook.
10. Check the quartz tube for excessive crystallization, cracks and blow-outs.
NOTICE!
Only reuse intact tubes.
11. Check the sealing rings in the gas sluice for cracks and brittle spots. Replace the
sealing rings if necessary.
12. Rinse the tube with ultrapure water and allow it to dry.