Endress+Hauser gammapilot FTG 671, Operating Instructions Manual

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Mounting and installation The QG
…
source container and DG
…
Z detector are mounted diametrically opposite
each other at each side of the vessel.
•
The detector is normally mounted horizontally
•
The source and detector must be exactly aligned.
•
For the DG 57, the beam must be aligned to fall into the area between the two
gold strips on the detector which indicate the measuring zone (or length), for
the DG 17/27 on the marking.
The QG
…
source container may be bolted onto a mounting pipe or the tank with an
appropriate counterflange or onto e.g. a steel frame. Where the construction allows
access to the front of the source container, appropriate protective measures must be
taken to prevent accidental exposure.
Using the clamps supplied, the DG 57 detector must be clamped directly to the vessel
or a steel frame. DG 17/DG 27 Geiger-Müller counters can in addition be bolted to a
flange. Here it is also possible to mount the detector so that only the front face is
irradiated. For limit value detection with the DG 57, the radiation levels at the detector
side are usually so low that no control area exists. This must, however, be checked with
a dosimeter during commissioning. Fig 2.8 shows mounting examples for common
applications.
BA082D11
Standard application
Installation for two limits
Installation for strong vibrations or
high temperature
Installation on small diameter pipes (top view)
➀
➁
Fig. 2.8:
Mounting examples for common
applications
Gammapilot FTG 671 Chapter 2: Installation
17