Teledyne 3010PA Operating Instructions Manual page 100

Oxygen Analyzers
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).
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.
Appendix
Appendix: A-11