138
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.3.7
Upper blanking (P023)
This defines a zone close to the transmitter where echoes are to be ignored. Establishing this
zone eliminates echoes from false targets such as mounting fittings or the end of stub pipes.
Enter the vertical distance from the transmitter face to where a valid surface echo can be
detected. See
for this zone in a tank geometry illustration.
Note
To avoid a false high level alarm, the upper blanking distance should not be set to less than the
factory default setting.
Note
The pulse transmission stops if the sum of the Lower Blanking (
) and Upper Blanking
and is greater than the Transmitter Bottom Reference (
Field Communicator or AMS Device
Manager
To view or change the upper blanking
distance
1.
From the
Home
screen, select 2: Configure.
2.
Select 2: Manual Setup.
3.
Select 5: Engineering (
3105
) or
6: Engineering (
3102
).
4.
Select 5: Upper Blanking P023.
5.
If a change is required:
(a) Input the new blanking distance, and select “ENTER” to save it.
(b) Select “Send” or “Apply” to update the transmitter.
Note
When messages appear, take appropriate action if needed and select “OK”.
Fast Keys
2, 2, 5 [or 6], 5
Upper Blanking P023
1.000 ft
1.000 ft
ESC
DEL
ENTER
HELP
w
s
q
a
z
Lock
Shift
@ &
á ü
x
e
d
c
r
f
v
t
g
b
y
h
n
u
j
m
*
-
+
/
.
0
7
4
1
8
5
2
9
6
3
i
k
o
l
FN
(
Field Communicator Screen Shown
)
Summary of Contents for Rosemount 3101
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Page 4: ...ii Reference Manual 00809 0100 4840 Rev CB Title Page February 2015 ...
Page 12: ...x Reference Manual 00809 0100 4840 Rev CB Contents February 2015 Contents ...
Page 34: ...22 Reference Manual 00809 0100 4840 Rev CB Section 3 Installation February 2015 Installation ...
Page 68: ...56 Reference Manual 00809 0100 4840 Rev CB Section 4 Starting up February 2015 Starting up ...
Page 236: ...224 Reference Manual 00809 0100 4840 Rev CB Index February 2015 Index ...
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