Manual Mode Zeroing - Teledyne 6600 Operating Instructions Manual

3 Operation
software steps in the zeroing process that the system must complete, AFTER
settling, before it can go back to Analyze. Software zero is indicated by S–
Zero in the lower right corner.
NOTE: In a Oil/Water sampling system, when performing a sched-
uled zero, instrument will go to span mode automatically (when span flag
option has been purchased).
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.
3.4.1.2
Enter the Zero function. The screen that appears allows you to select
between automatic or manual zero calibration. Use the UP/DOWN switch
between AUTO and MAN zero settling. Stop when MANUAL appears, blinking,
on the display.
Enter to begin the zero calibration. After a few seconds the first of three
zeroing screens appears. The number in the upper left hand corner is the first-
stage zero offset. The microprocessor samples the output at a predetermined
rate.
The analyzer goes through C–Zero, F–Zero, and S–Zero. During C–Zero
and F–Zero, use the UP/DOWN
as close as possible to zero. Then,Enter.
S–Zero starts. During S–Zero, the Microcontroller takes control as in Auto
Mode Zeroing, above. It calculates the differences between successive sam-
plings and displays the rate of change as Slope= a value in parts per million per
second (ppm/s).
Once zero settling completes, the information is stored in the analyzer's
memory, and the instrument automatically returns to the Analyze mode.
3-18 Part I
####.## ppm
4 Left=#.### S—Zero

Manual Mode Zeroing

Select zero
mode: MANUAL
####.## ppm
Zero adj:2048 C—Zero
to adjust displayed Zero adj: value
SWITCH
####.## ppm
Slope=#.### S—Zero
Teledyne Analytical Instruments
OIL
OIL
OIL
Model 6600