Maintenance
GA09313_0202 – (2008-02) –
¤
Oerlikon Leybold Vacuum
21
s
Blow the particles in the measuring chamber with dry nitrogen (be careful to
hold the measuring chamber with the flange pointing downwards).
t
Slide the polarity insert (6) into the measuring chamber until the mechanical
stop is reached.
u
Place the circlip (5) snugly fitting on the polarity insert.
Visually check that the anode pin is centered over the middle
hole of the polarity insert (max. eccentricity = 0.5 mm).
v
If possible perform a leak test (leak rate <10
-9
mbar l/s).
WARNING
WARNING: electric arcing
Helium may cause electric arcing with detrimental effects on
the electronics of the product.
Before performing any tightness tests put the product out of
operation and remove the electronics unit.
w
Mount the magnet unit (4) and lock it with the screw (3).
Carefully mount the electronics unit (2). (Make sure the pin of the Pirani ele-
ment is properly plugged into the corresponding hole of the electronics unit.)
Push the electronics unit up to the mechanical stop and lock it with the
hexagon socket set screw (1).
Adjust the transmitter (
→
16).
