Filter time -8, Figure 3-14. trim 4 ma? -8, Model 3081fg – Emerson 3081FG User Manual
Page 38: Instruction manual
Instruction Manual
IB-106-3081 Rev. 1.5
September 2002
3-8 Startup and Operation
Rosemount Analytical Inc. A Division of Emerson Process Management
Model 3081FG
f. RESET MAX CELL T
Refer to Figure 3-12. The transmitter tracks
the maximum cell temperature obtained.
Use this screen to reset the maximum cell
temperature attained value to the current
cell temperature. Press ENTER to begin
editing. Use the arrow keys to select and
change the value (Y/N). Then, press EN-
TER to accept the value. Pressing NEXT
displays the SET O
2
FILTER TIME screen.
%
O CONCENTRATION
2
Y/N (TO RESET
MAXIMUM CELL
TEMPERATURE)
26020013
Figure 3-12. RESET MAX CELL T
%
O CONCENTRATION
2
ANALYZER
ACCESS CODE
26020047
Figure 3-13. SET O
2
FILTER TIME
g. SET
O
2
FILTER TIME
Refer to Figure 3-13. In some applications,
it is beneficial to dampen the raw O
2
signal
coming from the cell. Use this screen to
enter the amount of time it will take the O
2
to
reach 90% of the new reading. Press EN-
TER to begin editing. Use the arrow keys to
select and change the screen value to the
O
2
filter value (in seconds). Enter a value
between 0 and 300 seconds and press EN-
TER to accept the value. Press NEXT to
access the TRIM 4 mA? screen.
h. TRIM 4 mA?
Refer to Figure 3-14. Use this screen to trim
the 4 mA value of the 4-20 mA output.
NOTE
Before trimming the 4 mA value, you
must break the loop to add the amme-
ter. Power down the unit, connect the
ammeter in series with Model 3081
Transmitter terminals 15(-) and 16(+),
power up the unit, and return to the
TRIM 4 mA? screen.
Press ENTER to begin editing. Use the ar-
row keys to select and change the screen
value to the value displayed on the installed
ammeter. Press ENTER to accept the
value. After the value is entered, the unit
calibrates itself to ensure it outputs 4 mA.
Both the display and the ammeter will dis-
play 4 mA. Pressing EXIT returns to the ini-
tial TRIM 4 mA? screen, and pressing
NEXT displays the TRIM 20 mA? screen.
%
O CONCENTRATION
2
26020014
Figure 3-14. TRIM 4 mA?