Teledyne 3000PB - Bulkhead mount percent oxygen analyzer User Manual
Page 76
A-8
Appendix
Model 3000PB
Teledyne Analytical Instruments
A-6
Zero Cal
The
Zero
button on the control panel is used to enter the zero calibra-
tion function. Zero calibration can be performed in either the automatic or
manual mode. In the automatic mode, an internal algorithm compares
consecutive readings from the sensor to determine when the output is within
the acceptable range for zero. In the manual mode, the operator determines
when the reading is within the acceptable range for zero. Make sure the zero
gas is connected to the instrument.
Auto Mode Zeroing
Press
Zero
to enter the zero function mode. The screen allows you to
select whether the zero calibration is to be performed automatically or manu-
ally. Use the
Δ∇ arrow keys to toggle between AUTO and MAN zero
settling. Stop when AUTO appears, blinking, on the display.
Zero: Settling: AUTO
Press
Enter
to begin zeroing.
#### % Zero
Slope=#### ppm/s
The beginning zero level is shown in the upper left corner of the dis-
play. As the zero reading settles, the screen displays and updates information
on Slope (unless the Slope starts within the acceptable zero range and does
not need to settle further).
Then, and whenever Slope is less than 0.08 for at least 3 minutes,
instead of Slope you will see a countdown: 1 Left, 0 Left, and so forth.
These are five steps in the zeroing process that the system must complete,
AFTER settling, before it can go back to
Analyze
.
#### % Zero
1 Left=### ppm/s
The zeroing process will automatically conclude when the output is
within the acceptable range for a good zero. Then the analyzer automatically
returns to the
Analyze
mode.
Manual Mode Zeroing
Press
Zero
to enter the
Zero
function. The screen that appears allows
you to select between automatic or manual zero calibration. Use the
Δ∇ keys