Teledyne Analytical Instruments 3020 M, Operating Instructions Manual

Page: 75 / 107

Operation Model 3020M-ATEX
Teledyne Analytical Instruments 52
Use DOWN/UP to start changing the oxygen-concentration. Use
ESCAPE/ENTER to blink the digit you are going to modify. Use
DOWN/UP again to change the value of the selected digit. When you
have finished typing in the concentration of the span gas you are using,
repeatedly select ENTER until the rightmost digit is reached, then, the
next ENTER will exit the
Span Val
screen. One more ENTER will enter
the new span value, bring up the next screen, and start 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
information on
Slope
. Spanning automatically ends when the span output
corresponds, within tolerance, to the value of the span gas concentration.
Then the instrument automatically returns to the ANALYZE mode.
4.8.2.2 M
ANUAL
M
ODE
S
PANNING
ENTER SPAN from the MAIN MENU 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 DOWN/UP to toggle between
AUTO
and
MAN
span settling.
Stop when
MAN
appears on the display. Use ENTER to move to the next
screen.
Span Val: 20.90
<ENT>Span <UP>Mod #
Use UP to permit modification (
Mod #
) of span value.
Use ESCAPE/ENTER to choose the digit, and use DOWN/UP to
choose the value of the digit.
When you have finished typing in the concentration of the span gas
you are using, repeatedly select ENTER until the rightmost digit is
reached, then, the next ENTER will exit the Span Val field. One more
ENTER will enter the new span value, bring up the next screen, and start
the span calibration.
Once the span has begun, the microprocessor samples the output at
a predetermined rate. It calculates the difference between successive