Emerson Rosemount 2130 Reference Manual page 13

Reference Manual
00809-0100-4130
2.5.1 Short fork technology
Using short-fork technology, the device can be used in almost all liquid applications.
Extensive research has maximized the operational effectiveness of the fork design, making
it suitable for most liquid mediums including coating liquids, aerated liquids, and slurries.
2.5.2 Fork design
The "fast drip" design allows the liquid to be quickly drawn away from the fork tip, making
the Rosemount 2130 quicker and more responsive in high density or viscous liquid
applications.
Figure 2-2: "Fast drip" forks
2.5.3 Instrument health monitor and continuous self-check
The Rosemount 2130 continuously performs instrument health diagnostics to self-check
the condition of the fork and sensor. These diagnostics can detect damage to the forks
including corrosion, internal or external damage to the forks, and breakages to the
internal wiring.
Detected damage will trigger the 'heartbeat' LED to pulse intermittently, followed by safe
handling of the electrical load.
2.5.4 Heartbeat LED
Each electronics cassette of the level switch has a 'heartbeat' LED indicating its operation
status. The LED flashes when the level switch output is 'off' and is constantly lit when 'on'.
The LED gives a constant indication that the level switch is functioning correctly (different
flash rates are used to indicate a product malfunction) and gives a local indication of the
process state.
2.5.5 Mode switch and adjustable output delay
A mode switch on the electronics cassette allows the level switch output to be 'on' or 'off'
when the forks are wet or dry. Typically is set to 'dry on' (for a low-level point alarm) or 'wet
on' (for a high-level point alarm). There is also a user-selectable time delay (0.3, 1, 3, 10, or
30 seconds) on the electronics cassette to virtually eliminate the risk of false switching in
turbulent or splashing applications.
Rosemount 2130 Level Switch
Level switch overview
May 2022
13