177
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
Rosemount 3490 Series Control Unit
To view or change the temperature
setting:
1.
From the
Main Menu
screen, select SETUP.
2.
Select the transmitter (e.g. “Tx1: 3102”).
3.
Select ENGINEERING., and then select Temperature.
4.
Follow the on-screen instructions to edit and save the new setting.
(Use the Enter (
) key if prompted to change mode to “off-line”).
5.
Select “Quit” to exit to the previous menu.
F.3.31
Set threshold (P026)
This sets the sensitivity of the echo detection circuits in the transmitter. The threshold is a
percentage defining the minimum signal level, above which an echo is detected and treated as a
potentially valid surface or target.
When the threshold is set to “Auto”, the sensitivity is automatically adjusted over a range of
values, depending on the echo strengths being received. The threshold is adjusted to one
quarter of the peak value of the largest signal detected to give best overall performance. The
live value is indicated in the read-only Threshold In Use parameter (
).
The threshold can be a constant value, which may be needed to overcome on-site difficulties or
special conditions.
Note
The threshold value can be adjusted in conjunction with the Upper Blanking (
), Lower
Blanking (
), and Threshold 1 Size (
Field Communicator or AMS Device
Manager
To view or change the threshold setting
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 2: Set Threshold.
5.
Select 1: Set to Automatic (NaN) for automatic (dynamic) adjustments.
6.
Alternatively, select 2: Edit to fix threshold, input a threshold percentage, and then save
it by selecting “ENTER”.
Fast Keys
2, 2, 7 [or 8], 2, 2
Temperature P025
Auto
F
Esc=Quit =Edit
(
Rosemount 3491 Screen Shown
)
Set Threshold (NaN %)
NaN
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 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 ...
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