Teledyne 2120XL - Trace Nitrogen Analyzer User Manual
Page 65
Trace Nitrogen in Argon Analyzer
Operation
Teledyne Analytical Instruments
53
by the analyzer’s display. In Auto mode, this is done automatically by
the software.
From the Linearizer (Lin) function screen, use the ◄►arrow keys
to position the blinking over the Setup function, and press ENTER. The
following screen appears:
Linearize
Manual Auto
To enter Manual or Auto Mode, use the ◄►arrow keys to position
the blinking over the Manual or Auto and press ENTER. The following
screen appears:
In 0.0
pp
b
1
Out 0.0
pp
b Accept
where the number (1) in the right corner of the screen indicates the
linearization sample number currently being entered. In this exampe, it
is the first sample to be entered.
In MANUAL mode, the number adjacent to “
In”
is editable. It
represents the unlinearized concentration of the sample gas as reported
by the analyzer. In AUTO mode, this value is not editable but is entered
automatically by the routine. The value for “
Out
” is editable in both Man
and Auto modes.
Out
is entered by the user and represents the desired
linearized value of the sample. For instance, feeding the analyzer a
prepared linearizer sample gas whose concentration is known to be 10.0
ppm and the analyzer reports an unlinearized value of
13.6pm
adjacent to
In
, the user would correct this by entering
10.0pm
as the
Out
value.
If not done already, hook up the first linearization sample to the
sample input of the analyzer and allow the gas to flow for a few minutes.
Watch the display and when the concentration value is stable, enter the
correct value for
Out
and then press ENTER to accept the value.
A confirmation screen will appear.
Pressing ENTER again will save the data into memory to be used
for calculating the coefficients used in the best fit linearization