Kobold NBK-ATEX, Operating Instructions Manual

Page: 7 / 57

NBK-03 to -33 ATEX
NBK-03 to -33 ATEX K10/0322 page 7
6. Mechanical Connection
Remove the bottom flange from the
bypass tube, and insert the
cylindrical float in the NBK bypass
tube with the designation "TOP"
upturned. Reposition the gasket
and close the bottom flange again;
firmly tighten with screws.
Mount the bypass tube to the
vessel to be monitored via the
process connection and seal with
an appropriate device. Normally it
is sufficient to fix the complete NBK
with both process connections.
However the NBK should be
subjected to constant shock or
strong
vibrations it is
recommended that the instrument
is secured with rubber-damped
tube clips. No welding is allowed on
the bypass tube.
Mount and tighten the
magnetic
roller indicator - if not already
mounted - on the bypass tube with
the two provided ribbon clamps.
Mount and tighten the
reed switch - if available - on the bypass tube at the opposite
side of the roller indicator with the provided ribbon clamps (ex contact: two ribbon
clamps). The height of the switch contacts may be selected at will. The cable connec-
tion must point downwards. The switch must be attached close to the bypass tube. The
switching function of the switch is impaired by an enlarged air gap.