Teledyne 3010MB - Split architecture paramagnetic oxygen analyzer - Manual (Page 70)

A-6
Appendix Model 3010M
Teledyne Analytical Instruments
Manual Mode Zeroing
ENTER the ZERO function. The screen that appears allows you to
select between automatic or manual zero calibration. Use DOWN/UP to
toggle between
AUTO and MAN zero settling. Stop when MAN appears on
the display.
Zero: Settling: Man
To Begin
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 predeter-
mined 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 using
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, ENTER it. In a
few seconds, the screen will update.
Once zero settling completes, the information is stored in the
microprocessor, and the instrument automatically returns to the ANALYZE
screen.