BG 5153 BEN / D (2017-07) IKR 261
19
If possible perform a leak test (leak rate <10
-9
hPa 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.
Mount the magnet unit (4) and lock it with the hexagon head screw (3).
Mount the electronics unit (2) and secure it with the hexagon socket set
screw (1).
DANGER
Due to missing ground connection in conjunction with missing
or not correctly tightened hexagon socket set screw (1) danger-
ous contact voltage will occur and electronic components will
be damaged.
Insert a new metal seal (11) incl. the centering ring (12) centered into the
measuring chamber. Make sure the seal and ceramic are clean
(
→
Figure 4c).
Carefully insert the anode (10) incl. ignition aid (10a) into the measuring
chamber.
Place the washer (9a) and pressure piece (9) on the measuring chamber
and secure them by
uniformly
tightening the four screws (8) incl. lock
washers (8a) until the mechanical stop is reached.
Position the ignition aid (10a) by sliding the mounting tool over the anode
pin until the mechanical stop is reached.
Blow the particles in the measuring chamber with dry nitrogen (be careful to
hold the measuring chamber with the flange pointing downwards).
Slide the polarity insert (6) into the measuring chamber until the mechanical
stop is reached.
Place the circlip (5) snugly fitting on the polarity insert.
Caution
Visually check that the anode pin is centered over the middle
hole of the polarity insert (max. eccentricity = 0.5 mm).
Procedure for long type
