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4 Mounting
Screwing in
Protection against mois-
ture
Suitability for the process
conditions
10
4
Mounting
4.1
General instructions
On instruments with process fitting thread, the hexagon must be tight-
ened with a suitable wrench. For the proper wrench size see chapter
"Dimensions".
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Protect your instrument against moisture ingress through the following
measures:
•
Use the recommended cable (see chapter "Connecting to power
supply")
•
Tighten the cable gland
•
When mounting horizontally, turn the housing so that the cable
gland points downward
•
Loop the connection cable downward in front of the cable gland
This applies particularly to:
•
Outdoor mounting
•
Installations in areas where high humidity is expected (e.g. through
cleaning processes)
•
Installations on cooled or heated vessels
Make sure that all parts of the instrument exposed to the process are
suitable for the existing process conditions.
These are mainly:
•
Active measuring component
•
Process fitting
•
Process seal
Process conditions are particularly:
•
Process pressure
•
Process temperature
•
Chemical properties of the medium
•
Abrasion and mechanical influences
You can find detailed information on the process conditions in chapter
"Technical data" as well as on the type label.
4.2 Collar or adapter flange
For mounting the instrument on a socket, a combi compression flange
for DN 80 (ASME 3" or JIS 80) is also available for retro fitting. Option-
ally, the instrument can be also equipped with an adapter flange from
DN 100 (ASME 4" or JIS 100).
With the housing versions plastic, aluminium single chamber and
stainless steel, the collar flange can be placed directly over the hous-
ing. With the aluminium double chamber housing, retroactive mount-
LEVEL TRANSMITTER 8136 • 4 ... 20 mA/HART - two-wire
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