Rosemount 2120, Reference Manual

Page: 14 / 72

Reference Manual
00809-0100-4030, Rev DA
June 2007
Rosemount 2120
1-6
Installation Considerations and Recommendations
Before you install the Rosemount 2120 Level Switch, consider specific installation
recommendations and mounting requirements.
• Install in any orientation in tank containing liquid.
• Always install in the normally “on” state. (See “Electrical Installation” on page 2-7)
• For high level the recommendation is Dry = on.
• For low level the recommendation is Wet = on.
• Always ensure the system is tested by using the local magnetic test point during
commissioning. (See “Magnetic Test Point” on page 3-1)
• Ensure sufficient room for mounting and electrical connection (See “Dimensional
Drawings” on page A-5 for switch dimensions.)
Figure 1-3. Ensure Adequate Space Outside Tank
• Ensure that the forks do not come into contact with the tank wall or any internal fittings
or obstructions.
• Avoid installing the 2120 where it will be exposed to liquid entering the tank at the fill
point.
• Avoid heavy splashing on the forks.
• Raising the time delay reduces accidental switching caused by splashing.
• Avoid product buildup.
• Ensure no risk of bridging the forks.
• Ensure there is sufficient distance between build-up on the tank wall and the fork.
• Ensure installation do not create tank crevices around the forks where liquid may
collect (important high viscosity and high density liquids).
2
1
2
0
/2
12
0_
28a
a.e
p
s