Teledyne 3000PB - Bulkhead mount percent oxygen analyzer - Manual (Page 77)

A-9
Percent Oxygen Analyzer Appendix
Teledyne Analytical Instruments
to toggle between AUTO and MAN zero settling. Stop when MAN appears,
blinking, on the display.
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 .
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
microprocessor, and the instrument automatically returns to the Analyze
mode.