Instruction manual

Instruction Manual
760006-A
September 2001
3-6 Operation Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 Platform
3-3 USING THE HELP SCREENS
There is an extensive set of help menus that
can be accessed from many of the functional
menus. The context sensitive help menus can
be accessed whenever the INFO tag is shown
above the F5 softkey.
Figure 3-8. Help Displays
Press the INFO (F5) softkey from any menu
that display it.
Pressing INFO (F5) again will display addi-
tional help screens.
Some help screens may have sub menus
selectable by moving the cursor to the line
and press the ENTER (↵) softkey.
The MORE (F3) and INFO (F5) keys may
also display additional help screens.
CLD 7.50 ppm
HOME
ESCAPE MORE INFO
Analyzer Module Help
CLD Module
This module detects NO by reacting it with ozone and
measuring the light produced. It can reduce NO2 to NO and
tthen measure the total amount of NO, this measurement is
called NOx. It uses a converter to do this, and it makes its
own ozone with an ozonator. It is vital that the temperatures
of these are correct. It is necessary to replace the converter
periodically.
CLD 7.50 ppm
HOME
ESCAPE INFO
Controls Hel
p
This screen selects immediately available functions.
Lines that are not editable refer to variables set up elsewhere.
To zero or span the analyzer, flow appropriate gas, select the
correct range and press the zero or span button; Do a zero
before span!
Measurement mode enables the NOx converter, and therefore
whether the analyzer measures NOx (if it is) or NO.
Ozonator status shows whether the ozonator is powered or
not.
CLD 7.50 ppm
HOME
ESCAPE CAL NO/NOx INFO
-- Ex
p
ert Controls --
Measurement ran
g
e number: 1
Range upper limit: 10.0 ppm
Range settings…
Range and functional control: Local
Measurement mode: NO
Ozonator status: OFF – PRES. SW.
Ozonator power: Enabled
Zero/Span calibration…
Ranges with valid calibration: None
Ph
y
sical measurements…
Findin
g
y
our wa
y
in the CLD menus…
Calibration info…