Analytical-industries GPR-2900 Series Oxygen Analyzer Manuel d'utilisateur télécharger pdf (Page 16)

Advanced Instruments Inc.

Note: For calibration purposes, use of the AUTO SAMPLE mode is recommended. However, the user can select the full scale

MANUAL SAMPLE RANGE for calibration as dictated by the accuracy of the analysis required – for example, a span gas with an

8.0% oxygen concentration with the balance nitrogen would dictate the use of the 0-10% full scale range for calibration and a

0-5% or 0-1% measuring ranges.

Auto Sampling:

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

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

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

4. The display returns to the sampling mode:

MAIN MENU

AUTO SAMPLE

MANUAL SAMPLE

CALIBRATION

CONFIG ALARMS

BYPASS ALARMS

3.3 %

AUTO SAMPLING

5 % RANGE

24.5 C

LO1 1% 10% HI2

The display will shift to the next higher range when the oxygen reading (actually the sensor’s signal output) exceeds 99.9% of

the upper limit of the current range. The display will shift to the next lower range when the oxygen reading drops to 85% of the

upper limit of the next lower range.

For example, if the analyzer is reading 1% on the 0-10% range and an upset occurs, the display will shift to the 0-25% range

when the oxygen reading exceeds 9.9%. Conversely, once the upset condition is corrected, the display will shift back to the 0-

10% range when the oxygen reading drops to 8.5%.

Manual Sampling:

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

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

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

4. The following display appears:

MAIN MENU

AUTO SAMPLE

MANUAL SAMPLE

CALIBRATION

CONFIG ALARMS

BYPASS ALARMS

>>>

MANUAL RANGE

25%

10%

5. Advance the reverse shade cursor using the ARROW keys to highlight the desired MANUAL RANGE.

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

7. The following displays appears with the range selected and oxygen concentration of the sample gas:

MANUAL RANGE

25%

10%

>>>

3.3%

MANUAL SAMPLING

5 % RANGE

24.5 C

LO1 1% 10% HI2

8. The display will not shift automatically. Instead, when the oxygen reading (actually the sensor’s signal output) exceeds

110% of the upper limit of the current range an OVER RANGE warning will be displayed.

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Analytical-industries GPR-2900 Series Oxygen Analyzer Manuel d'utilisateur Page 16

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