Emerson Rosemount 3101, Reference Manual

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181
Reference Manual
00809-0100-4840, Rev CB
Appendix F: Programming the 3102 and 3105 using HART
February 2015
Programming the 3102 and 3105 using HART
F.3.35 Threshold 1 time (P043)
False echoes may occur close to the transmitter face. If they occur outside the Upper Blanking
distance (
page 174 ), the false echo can be ignored by entering the echo size as a percentage and
a time (representing distance).
Enter the time (representing distance) into Threshold 1 Time (P043) e.g. 6 ms represents an
approximate distance of 1 m, and 2 ms represents a distance of approximately 1 ft.
See "Threshold 1 size (P048)" on page 182 for entering the echo size .
Note
See also "False echoes under certain ambient operating conditions (on the 3102/3105)" on page
75 for additional information about adjusting the settings of parameters P043 and P048.
Field Communicator or AMS Device
Manager
To view or change the threshold time
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 7: Advanced Processing ( 3105 ) or
Select 8: Advanced Processing ( 3102 )
4. Select 2: Threshold, and then select 6: Threshold 1 Time P043.
5. If a change is required:
(a) Input a new value, and then select “ENTER” to save it.
(b) Select “Send” or “Apply” to update the transmitter.
Rosemount 3490 Series Control Unit
To view or change the threshold time
1. From the Main Menu screen, select SETUP.
2. Select the transmitter (e.g. “
Tx1: 3102
”).
3. Select ENGINEERING, and then select ADVANCED.
4. Select Thresh 1 Time.
5. Follow the on-screen instructions to edit and save a new setting.
6. Select “
Quit
” to exit to the previous menu.
Fast Keys
2, 2, 7 [or 8], 2, 6
Threshold 1 Time P043
2.9 ms
2.9
ESC DEL ENTER HELP
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( Field Communicator Screen Shown )
Thresh 1 Time P043
2.9ms
Esc=Quit =Edit
( Rosemount 3491 Screen Shown )