Teledyne 6600 manual 3-18Part, Operation, Model, 3.4.1.2Manual Mode Zeroing

3 Operation Model 6600

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).

####.## ppm	OIL
4 Left=#.###	S—Zero

Thezeroingprocesswillautomaticallyconcludewhentheoutputiswithin the acceptable range for a good zero. Then the analyzer automatically returns to the Analyze mode.

3.4.1.2Manual Mode Zeroing

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, onthedisplay.

Select zero mode: MANUAL

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.

####.## ppm OIL Zero adj:2048 C—Zero

The analyzer goes through C–Zero, F–Zero, and S–Zero. During C–Zero and F–Zero, use the UP/DOWN SWITCH to adjust displayed Zero adj: value 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).

####.## ppm OIL Slope=#.### S—Zero

Oncezerosettlingcompletes,theinformationisstoredintheanalyzer’s memory, and the instrument automatically returns to theAnalyzemode.

3-18 Part I

Teledyne Analytical Instruments