BERTHOLD TECHNOLOGIES LB 480, User Manual

Page: 141 / 450

SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
1 – 141
Volume 1 10 Source Replacement
1
Preparation
All necessary work has to be prepared well so that it can be carried
out quickly to keep exposure to the unshielded source to a mini-
mum. Using a drawing of the shielding, you should plan the best
procedure and have the following tools handy:
• Allen keys in the required sizes.
• 2 pairs of pliers to take hold of source and source holder (e.g. a
pair of combination pliers or multigrip pliers).
Cordon off an area consistent with the activity of the source. Pre-
vent persons from approaching.
If sufficient space is available, the source can be replaced in the
shielding installed at the measuring site. Move the new source in its
transport shielding close to the installation site.
Prepare a suitable, clean space, if possible with an auxiliary shield-
ing (shielding vessel, lead bricks, concrete stones, etc.) and place
the source holder and the source there on a piece of paper to pro-
tect it against dirt.
Depending on the construction, you either have to open the lock on
the shielding and turn the lever to center position between ON and
OFF until the hexagon head bolt of the source holders becomes vis-
ible, or remove the locking plate, so that you can unscrew thesource
holder.
Source Replacement Procedure

Open the lock (2) of the shielding (1).

If necessary, pull out the locking screw (5) from the lever.

Pull the knob (3) and turn the lever (4) by 90° to the right to
the center position between OPEN and CLOSED
Now the hex screw head of the source holder is visible.