Teledyne 9110T instruction manual Short Calibration Checks, ZERO/SPAN Check Procedures

Model 9110T NOx Analyzer						EPA Protocol Calibration
		Table 10-3: Activity Matrix for Data Quality
	Characteristic	Acceptance Limits			Frequency and Method		Action if Requirements
					of Measurement		are not Met
	Shelter	Mean temperature between 22°C			Check thermograph chart		Mark strip chart for the
	temperature	and 28°C (72° and 82° F), daily			weekly for variations greater		affected time period.
		fluctuations not greater than	±	°	than ± 2°C (4°F)		Repair or adjust
				2 C
							temperature control.
	Sample	No moisture, foreign material,			Weekly visual inspection		Clean, repair, or replace as
	introduction	leaks, obstructions; sample line					needed.
	system	connected to manifold
	Recorder	Adequate ink & paper			Weekly visual inspection		Replenish ink and paper
		Legible ink traces					supply.
		Correct chart speed and range					Adjust time to agree with
		Correct time					clock; note on chart.
	Analyzer	TEST measurements at nominal			Weekly visual inspection		Adjust or repair as needed.
	operational	values
	settings	9110T in SAMPLE mode
	Analyzer	Zero and span within tolerance			Level 1 zero/span every		Find source of error and
	operational	limits as described in Section 12 of			2 weeks; Level 2 between		repair.
	check	the Q.A. Handbook6			Level 1 checks at frequency		After corrective action, re-
					desired by user		calibrate analyzer.
	Precision check	Assess precision as described in			Every 2 weeks, Subsection		Calc, report precision,
		Sections 15&18 of the Q.A.			3.4.3 (Ibid.)		Section 12 of the Q.A.
		Handbook6					Handbook6.

10.8.2. SHORT CALIBRATION CHECKS

A system of Level 1 and Level 2 zero/span checks (Table 10-2) is recommended. These checks must be conducted in accordance with the specific guidance given in Section 12 of the Q.A. Handbook6. Level 1 zero and span checks must be conducted every two weeks. Level 2 checks should be conducted in between the Level 1 checks at a frequency desired by the user. Span concentrations for both levels should be between 70 and 90% of the measurement range.

Zero and span data are to be used to:

∙Provide data to allow analyzer adjustment for zero and span drift;

∙Provide a decision point on when to calibrate the analyzer;

∙Provide a decision point on invalidation of monitoring data.

These items are described in detail in Sections 15 & 18 of the Q.A. Handbook6. Refer to Section 11 of this manual if the instrument is not within the allowed margins. We recommend using APICOM and the DAS for analysis and documentation of zero/span check data.

10.8.3. ZERO/SPAN CHECK PROCEDURES

The Zero and span calibration can be checked in a variety of different ways. They include:

∙Manual zero/span checks can be done from the front panel touchscreen. The procedure is in Section 9.2.2 of this manual.

∙Automatic zero/span checks can be performed every night. See Section 9.5 of this manual for setup and operation procedures.

Teledyne Analytical Instruments 233