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Figure 4-24: Pump 1 and Pump 2 are On (Rising Level Above 8 m)
A
E
F
B
C
D
A. Level in m
B. 8.0 m (P421)
C. 5.0 m (P411)
D. 2.0 m (P412)
E. Pump 1
F. Pump 2
Pump 1 and Pump 2 continue to pump down until the level falls to below 2 m (Off Point,
P412 and P422), at which relays RL1 and RL2 de-energize to switch off both pumps (
Figure 4-25: Pump 1 and Pump 2 are Off (Falling Level Below 2 m)
A
E
F
B
C
D
A. Level in m
B. 8.0 m (P421)
C. 5.0 m (P411)
D. 2.0 m (P412)
E. Pump 1
F. Pump 2
In this emptying application, the common off point is P412 (Off point, relay RL1) and P422
(Off point, relay RL2), both of which are at the 2 m level.
Reference Manual
Getting started
00809-0100-4841
January 2021
Emerson.com/Rosemount
101
Содержание Rosemount 3490 Series
Страница 4: ...4 ...
Страница 8: ...Introduction Reference Manual January 2021 00809 0100 4841 8 Emerson com Rosemount ...
Страница 16: ...Control unit overview Reference Manual January 2021 00809 0100 4841 16 Emerson com Rosemount ...
Страница 36: ...Installation Reference Manual January 2021 00809 0100 4841 36 Emerson com Rosemount ...
Страница 134: ...Getting started Reference Manual January 2021 00809 0100 4841 134 Emerson com Rosemount ...
Страница 158: ...Specifications and reference data Reference Manual January 2021 00809 0100 4841 158 Emerson com Rosemount ...
Страница 184: ...Additional features Reference Manual January 2021 00809 0100 4841 184 Emerson com Rosemount ...
Страница 189: ...Reference Manual 00809 0100 4841 January 2021 Emerson com Rosemount 189 ...