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3-4 | Dycor CG1000-RTP Oxygen Analyzer
Calibration Set-up
To ensure an accurate calibration, the flow rates for both the zero and span
calibration gases must equal the flow rate used for daily operations.
Keep the cell pressure the same for calibrations and operations. For
example, if your sample is delivered to the analyzer at atmospheric
pressure, calibration gases must be delivered at atmospheric pres-
sure. Figure 3-3 and Figure 3-4 show how to use a gas bypass
technique for the calibration gases to keep the cell pressure at atmo-
spheric pressure during calibration.
use stainless steel tubing that is free of oil and dirt to deliver your
calibration gases; this prevents contamination that could affect proper
calibration.
% O
Range Calibration Gases
2
Span Gas
From 1.0% to 100% o
(instrument air - 20.9% - recommended)
Zero Gas
From 0.1% to 10% o
PPM O
Range Calibration Gases
2
The span gas must be at least a factor of 10 higher in oxygen content than the
zero gas (for example, if zero gas is 10 PPM, the span gas must be 100 PPM
or higher).
Span Gas From 10 PPM to 1000 PPM.
Zero Gas
From 1 PPM to 100 PPM.
We recommend that the span gas be of a higher oxygen content
than the zero gas by a factor of 10 (for example, if zero gas is
1.0%, span gas must be 10% or higher. If zero gas is .1%, span
NOTE
gas should be 1% or higher).
, balance n
2
2
, balance n
(2% recommended)
2
2
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