Appendix: A-11
Oxygen Analyzers
Appendix
Zero: Settling: Man
<ENT> To Begin
Press
Enter
to begin the zero calibration. After a few seconds the first
of five zeroing screens appears. The number in the upper left hand corner is
the first-stage zero offset. The microprocessor samples the output at a prede-
termined rate. It calculates the differences between successive samplings and
displays the rate of change as
Slope=
a value in parts per million per second
(ppm/s).
#### % Zero
Slope=#### ppm/s
NOTE: It takes several seconds for the true Slope value to display. Wait about
10 seconds. Then, wait until Slope is sufficiently close to zero before
pressing
Enter to finish zeroing. Slope is given in ppm/s.
Generally, you have a good zero when
Slope
is less than 0.05 ppm/s
for about 30 seconds. When
Slope
is close enough to zero, press
Enter
. In a
few seconds, the screen will update.
Once span settling completes, the information is stored in the micropro-
cessor, and the instrument automatically returns to
Analyze
mode.
Содержание 3010PA
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