Teledyne 200AU instruction manual Calibration Quality Check, Step Number Action Comment

Teledyne API Model 200AU NOX Analyzer Instruction Manual, 02293, Rev. F

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 9.1.6. Also, after calibration check the PREREACT – TEST function reading and compare it against the factory checkout value. Increasing readings are a predictor of problems.

Table 7-18: Calibration Quality Check

Step Number	Action	Comment
1.	Scroll the TEST	The SLOPE value for NOx should be 1.0 ± 0.3. If the value is
	function menu until	not in this range, check Section 9.1.6. If the SLOPE value is in
	the NOx SLOPE is	the acceptable range the instrument will perform optimally.
	displayed.
2.	Scroll the TEST	The SLOPE value for NO should be 1.0 ± 0.3. If the SLOPE is
	function menu until	in the acceptable range the instrument will perform optimally. If
	the NO SLOPE is	the value is not in this range, check Section 9.1.6.
	displayed.	NOTE:
		The NO and NOx slopes should be equal within ± 0.1.
3.	Scroll the TEST	This number should be near zero. Values between –10 to 150
	function menu until	mV are acceptable. This number already has the PREREACT
	the NOx OFFSET is	value subtracted out and is mainly the background signal due to
	displayed.	the molybdenum converter. If the OFFSET value is outside this
		range, check Section 9.1.6.
4.	Scroll the TEST	The instrument will now display the NO OFFSET value. Values
	function menu until	between –10 to 150 mV are acceptable. This number already
	the NO OFFSET is	has the PREREACT reading subtracted out and should be near
	displayed.	zero. If the OFFSET value is outside this range, check
		Section 9.1.6.

After the above procedure is complete, the M200AU is ready to measure sample gas.

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