Analytical Industries GPR-3500 MO Portable Oxygen Analyzer - Manual (Page 17)

Advanced Instruments Inc.
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MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATE
24.5 C 100 KPA
>>>
CALIBRATION
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
OUTPUT SPAN
OUTPUT ZERO
8. Press the ENTER key to calibrate or MENU key to abort and return to SAMPLING mode.
0.000 PPM
ZERO
CALIBRTION
ENTER TO CALIBRATE
MENU TO ABORT
9. Allow approximately 60 seconds for the calibration process while the processor determines whether the signal output or reading
has stabilized within 60% of the full scale low range.
10. Both the Zero Calibrate and Span Calibrate functions result in the following displays:
PASSED
CALIBRATION
OR
FAILED
CALIBRATION
For non-medical grade oxygen analysis, satisfying users that the zero offset is reasonably acceptable for their application can be
accomplished much quicker. Unless the zero gas is contaminated or there is a significant leak in the sample connections, the portable
oxygen purity analyzer should read less than 100 ppm oxygen within 10 minutes after being placed on zero gas.
The maximum zero calibration adjustment permitted is 60% of the lowest full scale range available, which normally is 1%. Thus the
maximum zero calibration adjustment or zero offset is 0.6% oxygen. Accordingly, the portable oxygen purity analyzers’ ZERO has not
been adjusted prior to shipment because the factory conditions are different from the application condition at the user’s installation.
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATE
24.5 C 100 KPA
>>>
CALIBRATION
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
OUTPUT SPAN
OUTPUT ZERO