Analytical-industries GPR-3500 MO Portable Oxygen Analyzer Manuel d'utilisateur télécharger pdf (Page 18)

Advanced Instruments Inc.

Output Zero

Accuracy due to manufacturer tolerances may result in a slight difference between the LCD display and the 0-1V analog output.

However, the difference is less than 0.25% of range and falls well below the specified accuracy of the analyzer. In rare instances the 0-

1V analog signal output may not agree to the reading displayed by the LCD. This feature enables the user to adjust the 0V analog

signal output when the LCD displays 00.00. Note: Adjust the 1V analog signal output with the OUTPUT SPAN option described below.

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.

3. Press the ENTER key to select the highlighted menu option and the following displays appear:

MAIN MENU

AUTO SAMPLE

MANUAL SAMPLE

CALIBRATION

>>>

CALIBRATION

SPAN CALIBRATE

ZERO CALIBRATE

DEFAULT SPAN

DEFAULT ZERO

OUTPUT SPAN

OUTPUT ZERO

4. Advance the reverse shade cursor using the ARROW keys to highlight DEFAULT ZERO.

5. Press the ENTER key to select the highlighted menu option.

6. The following display appears:

100.0

OUTPUT ZERO OFFSET

PRESS UP OR DOWN

TO CHANGE VALUE

ENTER TO SAVE

MENU TO RETURN

7. Compute the adjustment value as described in Appendix B or consult the factory. The true adjustment value must be determined

empirically by trial and error. Adjust the initial adjustment value for additional percent errors.

090.0

OUTPUT ZERO OFFSET

PRESS UP OR DOWN

TO CHANGE VALUE

ENTER TO SAVE

MENU TO RETURN

8. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline cursor left to reach to

the desired digit of the OUTPUT ZERO OFFSET value.

9. Press the ARROW keys to enter the OUTPUT ZERO OFFSET value.

10. Repeat until the complete OUTPUT ZERO OFFSET value has been entered.

11. Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key.

12. The system returns to the SAMPLING mode.

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Analytical-industries GPR-3500 MO Portable Oxygen Analyzer Manuel d'utilisateur Page 18

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