14
4 Mounting
MINITRAC 31 • 4 … 20 mA/HART - four-wire
40447-EN-130430
4.2 Mounting instructions
Note:
During the planning stage, our specialists will analyse the conditions
of the measuring point and dimension the source (isotope) accord-
ingly.
You get a "Source Sizing" document specifying the required source
activity and containing all relevant mounting information for your
measuring point.
You must follow the instructions of this "Source Sizing" document in
addition to the following mounting instructions.
The following mounting information is applicable as long as there is
nothing else specified in the "Source Sizing" document.
You can find information on protective barriers and the mounting
of the corresponding source container in the operating instructions
manual of the source container, e.g. VEGASOURCE.
You can mount the MINITRAC 31 in any position. If you have ordered
your instrument with a lead cover as a protection against ambient
radiation (optionally), the the sensor is shielded laterally against X-ray
radiation. In this case, the radiation can only penetrate frontally.
Fasten the sensors in such a way that they cannot fall out of the
holder.
Direct the exit angle of the source container to the MINITRAC 31.
Mount the source container as close as possible to the vessel. If there
are gaps, secure the area with a safety fence and protective grating
so that no one can reach into the dangerous area.
Caution:
Make sure that the tube is always completely filled. Mainly in horizon
-
tally arranged tube measuring distances, air bubbles or buildup in
the tube can influence the measuring result. Measurement should be
preferably through the centre of the tube.
1
2
Fig. 4: Installation on a horizontal pipeline
1 Air bubbles
2 Buildup
Installation position
