Vega VEGADIF 85 - Mounting; General Mounting Instructions

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4 Mounting
VEGADIF 85 • Modbus and Levelmaster protocol
53571-EN-230814
4 Mounting
4.1 General instructions
Note:
For safety reasons, the instrument must only be operated within the
permissibleprocessconditions.Youcannddetailedinformationon
the process conditions in chapter " Technical data" of the operating
instructions or on the type label.
Hence make sure before mounting that all parts of the instrument ex-
posed to the process are suitable for the existing process conditions.
These are mainly:
•
Active measuring component
•
Processtting
•
Process seal
Process conditions in particular are:
•
Process pressure
•
Process temperature
•
Chemical properties of the medium
•
Abrasionandmechanicalinuences
Thepermissibleprocesspressurerangeisspeciedonthetypelabel
with "MWP" (Maximum Working Pressure), see chapter " Congura-
tion".Thisspecicationreferstoareferencetemperatureof+25°C
(+76°F).TheMWPmayalsobepermanentlyappliedononeside.
In order to prevent damage to the device, a test pressure acting on
bothsidesmayonlyexceedthespeciedMWPbrieyby1.5times
atreferencetemperature.Thepressurestageoftheprocessttingas
well as the overload resistance of the measuring cell are taken into
consideration here (see chapter " Technical Data").
Inaddition,atemperaturederatingoftheprocesstting,e.g.with
angeisolatingdiaphragms,canlimitthepermissibleprocesspres-
sure range according to the respective standard.
Protect your instrument against moisture ingress through the following
measures:
•
Use a suitable connection cable (see chapter " Connecting to
power supply")
•
Tighten the cable gland or plug connector
•
Lead the connection cable downward in front of the cable entry or
plug connector
This applies mainly to outdoor installations, in areas where high
humidity is expected (e.g. through cleaning processes) and on cooled
or heated vessels.
Note:
Make sure that during installation or maintenance no moisture or dirt
can get inside the instrument.
Process conditions
Permissible process
pressure (MWP)
Protection against mois-
ture