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Emerson 308014EN Manual de usuario Pagina 30

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Rosemount Tank Radar REX
Chapter 3 Description of 3900 REX
3-4
Installation Manual
308014EN, Edition 4
May 2013
3.1.7 Metrological Seal
A switch on the FCC board can be used to prevent unauthorized
changes in the RTG database. The switch can be sealed in the write-
inhibit position by using a special plastic cover.
Internal switch
Figure 3-3. RTG 3900 transmitter head with metrological seal.
External switch
REX can also be equipped with an external metrological seal. It consists
of a rod which is connected to a write protection switch inside the
transmitter head. The rod can be sealed.
Figure 3-4. RTG 3900 transmitter head with metrological seal.
Metrological Seal
TH_Top.eps
WriteProtect.eps
Write enable
Write inhibit
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