Analytical Industries GPR-1600 Series Trace PPB Oxygen Analyzer - Manual (Page 37)

Advanced Instruments Inc.
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Auto Span: Applicable only to analyzers equipped with an optional automated sample system. The
system automatically closes the sample inlet valve and opens the span inlet valve at a
predetermined interval in time, see System Menu section above. It also trends the
downward slope of the oxygen reading vs. time curve. When the slope of the oxygen
reading reaches “0”, the system initiates a SPAN CALIBRATION adjustment and
displays an oxygen reading corresponding to the span gas value entered.
Manual Span: The user must ascertain that the oxygen reading has reached a stable value, see Span
Calibration Adjustment above, before the system will accept and make a SPAN
CALIBRATION adjustment.
Timed Span Cal: Subtitle only, this function represented by the following menu options are applicable
only to analyzers equipped with an optional automated sample system.
Timed Span Cal in ___ days: Requires the user to enter a “number” representing the interval in days before the next
SPAN CALIBRATION.
Calibration will occur at ____: Requires the user to enter a “military time in hours and minutes” representing the time
of day at which the next SPAN CALIBRATION will be initiated.
Timed Span Gas Value:
Displays the numerical span gas value and units entered when the Auto Span option
was initiated.
Procedure – Zero Calibration
The analyzer is online in the Auto Range mode as described above.
Review the Analysis Level Required, Online Recovery Time, Zero Calibration Offset Adjustment and Menu Functions – Zero
Calibration above before proceeding.
Assure there are no restrictions in vent line.
Regulate the pressure between 5-30 psig and set the flow rate to 2 SCFH for Fuel Cell sensors.
Allow the analyzer reading to stabilize below 50% of the most sensitive or lowest range available on the analyzer.
Advance the cursor (*) to the “Zero” option as illustrated and press the green ENTER key to accept the selection.
The following menu appears:
MAIN MENU
Sample
Span
* Zero
Alarm
System
Standby
Sample
5.00 PPM
Auto Range
85⁰F 100Kpa 0 to 10 PPM
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