Percent Oxygen Analyzer
Operation 4
4-11
Teledyne Analytical Instruments
Press
Enter
to move to the next screen.
Span Val: 20.90
<ENT>Span <UP>Mod #
Use the
∆∆∆∆∆∇
arrow keys to enter the oxygen-concentration mode. Use
the < > arrow keys to blink the digit you are going to modify. Use the
∆∆∆∆∆∇
arrow keys again to change the value of the selected digit. When you have
finished typing in the concentration of the span gas you are using (20.90 if
you are using air), press
Enter
to begin the Span calibration.
#### % Span
Slope=#### ppm/s
The beginning span value is shown in the upper left corner of the
display. As the span reading settles, the screen displays and updates informa-
tion on
Slope
. Spanning automatically ends when the slope is less than 1/50
of the displayed value of the oxygen concentration (in ppm) for three min-
utes. Then the instrument automatically returns to the analyze mode.
4.4.1.2
Manual Mode Spanning
Press
Span
to start the
Span
function. The screen that appears allows
you to select whether the span calibration is to be performed automatically or
manually.
Span: Settling:MAN
<ENT> For Next
Use the
∆∇
keys to toggle between
AUTO
and
MAN
span settling.
Stop when
MAN
appears, blinking, on the display. Press
Enter
to move to
the next screen.
Span Val: 20.90
<ENT>Span <UP>Mod #
Press
∆
(
<UP>
) to permit modification (
Mod #
) of span value.
Use the arrow keys to enter the oxygen concentration of the span gas
you are using (20.90 if you are using air). The < > arrows chose the digit,
and the
∆∇
arrows choose the value of the digit.
Press
Enter
to enter the span value into the system and begin the span
calibration.
Once the span has begun, the microprocessor samples the output at a
predetermined rate. It calculates the difference between successive samplings
and displays this difference as
Slope
on the screen. It takes several seconds
