Teledyne 100AH instruction manual Calibration Quality Check, Step Action Comment

Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D

8.7 Calibration Quality

After Zero/Span is complete, it is very important to check the QUALITY of the calibration. The calibration of the M100AH involves balancing several sections of electronics and software to achieve an optimum balance of accuracy, noise, linearity and dynamic range.

The following procedure compares the Slope and Offset parameters in the equation used to compute the SO2 concentration.

The slope and offset parameters are similar to the span and zero pots on an analog instrument. Just as in the analog instrument, if the slope or offset gets outside of a certain range, the instrument will not perform as well.

The offset value gives information about the background signal level. Check the observed offset value against the factory value in Table 2-1.If significantly higher check Section 10.1.6. Increasing readings are a predictor of problems.

Table 8-8: Calibration Quality Check

Step	Action	Comment
Number
1.	Scroll the TEST	Typical SLOPE value for SO2 is 1.0 ± 0.3. If the value is
	function menu until the	not in this range, check Section 10.1.6. If the SLOPE value
	SLOPE is displayed.	is in the acceptable range the instrument will perform
		optimally.
2.	Scroll the TEST	Typical number is less than 200mV which is mainly the
	function menu until the	optical system background. If the OFFSET value is outside
	OFFSET is displayed.	this range, check Section 10.1.6.

After the above procedure is complete, the M100AH is ready to measure sample gas.

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