Vega FIBERTRAC 31 - Principle of operation

9
3 Mounting
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
Metric threads
Inthecaseofinstrumenthousingswithmetricthread,thecable
glands are screwed in at the factory. They are sealed with plastic
plugs as transport protection.
You have to remove these plugs before electrical connection.
NPT thread
Inthecaseofinstrumenthousingswithself-sealingNPTthreads,itis
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
The suitable cable glands and blind plugs come with the instrument.
3.2 Mounting instructions
Note:
Duringtheplanning,ourspecialistswillanalysetheconditionsofthe
measurement loop to dimension the isotope accordingly.
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inthis"SourceSizing"documentin
addition to the following mounting instructions.
The following mounting information is applicable as long as there is
nothingelsespeciedinthe"SourceSizing"document.
L1
L2
h
Fig. 3: Level measurement in a storage tank
h Measuring range
L Measurement length (L1, L2)
Cable glands
Installation position