Endress+Hauser analytikjena PlasmaQuant 9100 - Page 65

PlasmaQuant 9100 (Elite) Maintenance and care
65
Replacing the sealing rings
If the torch is not gas-tight, i.e., problems occur during plasma ignition, the sealing rings
must be checked and replaced if necessary.
} Remove the torch from the torch holder as described.
} Unscrew the stopper from the gas connection and remove the O-ring.
} Unscrew the clamping ring from the torch holder and remove the retain-
ing ring, 2 O-rings and the spacer ring for the gas line.
} Check the sealing rings (O-rings) and replace any worn rings.
} Reinsert the sealing rings and the distance ring into the lower opening of
the torch holder in the following order:
Green O-ring – spacer ring – green O-ring – flat retaining ring – clamping
screw
– The spacer ring must be turned so that one of the two bore holes in
the ring is aligned with the small gas inlet opening (see arrow) in the
torch holder.
} Push the torch into the holder as far as it will go. At the same time, turn
it so that the gas inlet openings of the torch are centered in the openings
for the gas connection of the holder (arrows).
} Insert the small O-ring into the gas connection.
} Screw the stopper into the gas connection (1).
NOTICE!The upper edge of the stopper must be flush with the upper
edge of the holder. Do not screw it in any further under any circum-
stances.
} Firmly screw the clamp screw (2) into the holder. To ensure gas tightness
in the lower part of the torch, the gap between the clamp screw and the
holder must not exceed 0.5mm in width.