Emerson Rosemount 2140, Справочное руководство, Страница: 27 / 144

17
Reference Manual
00809-0100-4140, Rev AA
Configuration
January 2017
Configuration
c. Scroll down (

) and then select OUTPUT DELAY (

).
d. Follow on-screen instructions and edit a new delay setting in the range 0 to 3600.
Entering a delay outside this range results in ERROR being displayed.
3. If viewing the mode setting:
a. Select VIEW CONFIG (

).
b. Scroll down (

) until O DELAY and the delay setting appears.
4. Exit the menu system by either waiting one minute for the EXIT MENU? prompt, or
scrolling down menus to find and select BACK TO MENU and EXIT MENU .
Note
When messages about the loop appear, take appropriate safe action and select “

”.
See “Configuration basics” on page 10 for further information.
2.8.3 Media density
The measured frequency of the fork, when immersed in process medium, can be affected
by liquid density variations. As a result, the dry-to-wet and wet-to-dry switching points are
different for all types and varieties of process medium (
Figure 2-3 on page 18 ).
To overcome this, accurate switching points can be calculated by the Rosemount 2140 and
Rosemount 2140:SIS after a suitable density band is selected for the process medium.
Media Density options the Rosemount 2140 and Rosemount 2140:SIS are:

0.4 – 0.6 SG (for a 400 to 600 kg/m
3
range – e.g. propane)

0.5 – 0.9 SG (for a 500 to 900 kg/m
3
range – e.g. alcohol)

0.8 – 1.3 SG (for a 800 to 1300 kg/m
3
range – e.g. water) (default selection)

1.2 – 3.0 SG (for a 1200 to 3000 kg/m
3
range – e.g. acid)
Extra options on the Rosemount 2140 are:

Low compacted sediment

Medium compacted sediment

High compacted sediment

Extreme compacted sediment
Note
Versions of the Rosemount 2140 and Rosemount 2140:SIS with the Extended Features
Package (EFP) can use
Media Learn ( page 19 ) to automatically select a density band.
For all other versions, keep the default setting for Media Density when the liquid specific
gravity is unknown.
Fast keys
2, 2, 1, 1, 3