Emerson Rosemount 2120, Справочное руководство

Страница: 10 / 82

2.4 Application examples
Overfill prevention
Spillage caused by overfilling can be hazardous to people and the environment, resulting
in lost product and potentially high clean-up costs. The Rosemount 2120 is an overfill
prevention product from Emerson that can be used as one of multiple layers of protection.
It has been third party assessed and certified to IEC 61508.
High and low level point alarm
Maximum and minimum level detection in tanks containing different types of liquids are
ideal applications. It is common practice to have an independent high level alarm switch as
a backup to an installed level device in case of primary failure.
Pump control or limit detection
Batch processing tanks often contain stirrers and agitators to ensure mixing and product
‘fluidity’. The Rosemount 2120 has a user-selectable time delay, from 0.3 to 30 seconds,
that virtually eliminates the risk of false switching from splashing.
Level switch overview Reference Manual
March 2022 00809-0100-4030
10 Reference Manual