Teledyne 3000ZA operating instructions Zero Settling Man ENT To Begin

Trace Oxygen Analyzer Operation

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.

4.4.1.2MANUAL 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 __ keys 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 predetermined 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).

####ppm 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 zero settling is completed, the information is stored in the microprocessor, and the instrument automatically returns to the Analyze mode.

4.4.1.3CELL FAILURE

Cell failure in the 3000ZA is usually associated with inability to zero the instrument down to a satisfactorily low ppm reading. When this occurs, the instrument will still Zero, but the 3000ZA system alarm trips, and the LCD displays a failure message.

#.#ppm Anlz

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