Hoefer SE400 - Manual (Page 27)

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If you are unfamiliar with the installation,
please note:
The upper electrode is protected by a recessed
shield, which rests in the upper buffer chamber
once the lid is installed. It is easiest to install the
lid by first approaching the upper buffer chamber
from the front, and then sliding the safety lid down
straight down onto the connectors. If the lid does
not fit properly, check the position of the lower
electrode shield, which must clear the connectors
and rest in the lower buffer chamber, in front of
the the shield guides. Once all guides are in place,
press gently to connect the plugs.
1
2
shield guides
3
Fig 8. Safety lid installation.
The safety lid seats effortlessly
if all three features are properly
aligned:
1. The recessed upper electrode
shield slides into the upper
buffer chamber.
2. The lower electrode shield fits
into the lower buffer chamber
and rests in front of the shield
guides.
3. The electrode connectors align
and seat.