Analytical Industries GPR-1000 ATEX Portable Trace PPM Oxygen Analyzer - Manual (Page 15)

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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%.
Procedure - Manual Sampling:
1. Access the MAIN MENU by pressing the MENU key.
2. Advance the reverse shade cursor to highlight MANUAL SAMPLE.
3. Press the ENTER key to select the highlighted menu option.
4. The following displays appears:
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
>>> MANUAL RANGE
25%
1%
1000 PPM
100 PPM
10 PPM
5. Advance the reverse shade cursor to highlight the desired RANGE.
6. Press the ENTER key to select the highlighted menu option.
7. The following display(s) appear depending on the range selected and oxygen concentration of the sample gas:
00.00 PPM
MANUAL SAMPLING
10 PPM RANGE
24.5 C
OR 00.00 PPM
OVERRANGE
AUTO SAMPLING
10 PPM RANGE
24.5 C
000.0 PPM
MANUAL SAMPLING
100 PPM RANGE
24.5 C
OR 000.0 PPM
OVERRANGE
AUTO SAMPLING
100 PPM RANGE
24.5 C