Thermo Scientific LevelPRO Series, Installation Manual

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Hardware Installation
Multiple Detectors / Source Housings
Thermo Fisher Scientific LevelPRO Installation Guide
3-11
Certain applications may require the use of multiple detectors and / or
multiple source housings to span the desired measurable range.
If multiple detectors are used, the uppermost unit should be mounted so
that the top of its sensitive length is even with the top of the measurable
range. The remaining units should be mounted so that the top of each
detector’s sensitive length is aligned with or slightly overlaps the bottom of
the sensitive length of the detector mounted just above it.
If more than one source housing is required, the top source housing should
be installed with the top of its beam even with the top of the desired
measurable range. The other source housings should be spaced evenly along
the vertical dimension of the vessel. For example, if the range of interest is
12 feet and three fan beam sources are used, the source housings should be
spaced four feet apart.
The installation / arrangement drawings provide mounting dimensions for
several configurations (refer to drawings 868566 through 868571 ).
When mounting two or more pairs of strip sources and detectors on a small
diameter tank, adjacent pairs of source housings and detectors may be
rotated by 90° if necessary. The source housing and detector for each
source-detector pair at the same height must still be mounted on opposite
sides of the tank (180°). After mounting the uppermost source-detector
pair, the position of the source housing and detector in the next lower pair
may be rotated by 90° and so on.
Multiple
Detectors /
Source Housings