User guide

Part 1 Control Unit Model 3010MA
52 Teledyne Analytical Instruments
The beginning span value is shown in the upper left corner of the
display. As the span reading settles, the screen displays and updates
information 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 minutes. 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:100.00
<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. 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 for the first Slope value to display. Slope indicates rate
of change of the Span reading. It is a sensitive indicator of stability.
####%Span
Slope=####ppm/s
When the Span value displayed on the screen is sufficiently stable,
press Enter. (Generally, when the Span reading changes by 1% or less of
the full scale of the range being calibrated for a period of five minutes it is
sufficiently stable.) Once Enter is pressed, the Spanreading changes to
the correct value. The instrument then automatically enters the Analyze
function.