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Emerson Rosemount 2555 Quick Start Manual page 23

Solids level switches capacitance probe

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October 2020
Table 4-3: Quick-start Menus (continued)
Display
D.
0.5
1
(2)
2
4
10
15
25
35
(1)
Factory default setting.
(2)
Standard factory setting is 2 pF. Optional standard settings if ordered.
4.4.1
FSH and FSL settings
FSH:
Use the FSH setting for full-silo detection applications.
Power failure or line break is considered by the electronics to be as
full signal (as protection against overfilling).
FSL:
Use the FSL setting for empty-silo detection applications.
Power failure or line break is considered by the electronics to be as
empty signal (as protection against running dry).
Figure 4-2: FSH and FSL settings
FSL
3 4 5
Yellow LED
Quick Start Guide
Description
pF
FSH
6 7 8
3 4 5
6 7 8
Green LED
Menu item
Sensitivity
Required capacitance increase
between uncovered probe (after
calibration) and switch to output
covered probe
Change the preset value only if
required by the application. See
Guide to push-button
The D menu item is not valid, and is
not shown if Manual calibration
(menu item G) is set to ON.
FSL
FSH
3 4 5
6 7 8
3 4 5
Green LED
Yellow LED
Quick Start Guide
.
calibration.
6 7 8
3 4 5
6 7 8
Power failure
23

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