Rosemount 3107, Справочное руководство

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39
Reference Manual
00809-0200-4840, Rev BA
Section 4: Configuration
December 2014
Section 4: Configuration
4. Select Upper Blanking .
5. Follow the on-screen instructions to edit and save the new setting.
(Press the
Enter ( ) key if prompted to change the mode to “off-line”).
6. Select “ Quit ” to exit to the previous menu.
4.3.8 Lower blanking (P063)
This defines the zone above the Bottom Reference ( page 35 ) where echoes are ignored. The
zone eliminates echoes from false targets at the bottom of the tank e.g. pumps uncovered as
the liquid level decreases.
Note

See Figure 4-1 on page 37 for this zone in a tank geometry illustration.

The pulses transmission stops if the sum of the Upper Blanking ( page 62 ) and
Lower Blanking is greater than the Bottom Reference ( page 35 ).
Field Communicator or AMS
To view or change the lower blanking distance:
1. From the Home screen, select 2: Configure .
2. Select 2: Manual Setup .
3. Select 5: Engineering .
4. Select 6: Lower Blanking .
5. Input the new lower blanking distance, and press “ ENTER ” to save it.
6. Press “ SEND ” to update the transmitter.
Note

When messages appear, take appropriate action if needed and press “ OK ”.
Rosemount 3490 Series Control Unit
To view or change the lower blanking distance:
1. From the Main Menu screen, select SETUP .
2. Select the transmitter (e.g. “ Tx1: 3107 ”).
3. Select ENGINEERING .
4. Select Lower Blanking .
Fast Keys
2, 2, 5, 6
Lower Blanking P063
0.000 ft
0.000 ft
ESC DEL ENTER HELP
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q
a
z
Lock
Shift
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e
d
c
r
f
v
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g
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0
7
4
1
8
5
2
9
6
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FN
(Field Communicator Screen)
Lower Blanking P063
0.000ft
Esc=Quit =Edit
(Rosemount 3491 Screen)