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Calibration Setup
Figure 3-1 shows the location of the inlet port on the CG1000. When cali-
brating your system, connect your calibration gases upstream of this inlet
port as shown in Figure 3-4.
NOTE
Sample
Figure 3-4. Calibration / Process gas setup example.
Required Calibration Gases and Tubing
Us the same flow rate for calibration gases as you do for daily use of the
CG1000 analyzer. See the "Mechanical Installation" section for acceptable
pressure and flow ranges for inlet gas (calibration gases follow the same
rules). Use stainless steel tubing that is free of oil and dirt to deliver your
calibration gases. This prevents contamination and promotes proper cali-
bration.
The span gas must be a higher oxygen content than the zero gas by a fac-
tor of 10 (for example, if the zero gas is 1.0%, the span gas must be 10% or
higher).
You might find it easier to insert a switching valve before the inlet
port of the CG1000 sensor to switch more easily between introduc-
ing the sample and calibration gases as shown in the example on
Figure 3-4.
High
(Span)
Cal Gas
Gas
Low
(Zero)
Cal Gas
CG1000
Process / Cal
Control Valve
Installation
|
3-5
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