Specifications

Trace Oxygen Analyzer Module
Rosemount Analytical NGA 2000
748420-A
August 1999
17
S
TARTUP AND
O
PERATION
3
5. Press the
←
key to return to the previous menu.
6. Introduce a suitable span gas into the SAMPLE INLET and allow reading to stabilize.
Move the cursor to the
User span calibration...
line and press the
↵
key.
7. Move the cursor to the
Span gas concentration:
line and press the
↵
key. Enter the
correct span gas value by using the
↑↓
keys to change value and the
←→
keys to
select position. Press the
↵
key to enter the new span gas value.
8. Move the cursor to the
Press the select key for user span calibration now!
and press
the
↵
key. The new span calibration will now be entered.
9. Press the
←
arrow key to return to the previous menu.
10. You can view the new calibration data in the
Calibration data display
screen. To access
this screen go to the
Expert controls and set up
sub-menu and select
Analyzer module
set up...
From the
Analyzer module set up
sub-menu select
Calibration...
and from the
Advanced/Expert calibration
sub-menu select
Calibration data display...
This screen is
a view only display and data cannot be edited from this screen.
11. If for any reason you want to restore the original factory calibration data, you can do so
from the
Advanced/Expert calibration
sub-menu (see #9 above for directions to this sub-
menu). Select
Restore factory calibration!
and the original values will be restored.
Note:
Do not alter data in the
Load factory calibration data...
sub-menu except when
replacing sensors
.
Any changes made to this sub-menu will become the new default
restore factory calibration!
values.
12. Press the HOME softkey to re-enter the Main Menu.
13. Press DISPLAY softkey for the Run Mode display.
If you are unable to calibrate the module for some reason, see the NGA Reference manual
for a list of possible causes and solutions. The most likely cause is the use of incorrect
span gases.