Teledyne 9110T instruction manual ≤ 2min

Model 9110T NOx Analyzer EPA Protocol Calibration

2.Determine the volume (cm3) of the calibrator reaction cell (VRC). If the actual volume is not known, estimate the volume by measuring the approximate dimensions of the chamber and using an appropriate formula.

3.Determine the required minimum total flow output (FT) :

Equation 10-2

FT = analyzer flow demand (cm3/min) x 110/100

∙If more than one analyzer is to be calibrated at the same time, multiply FT by the number of analyzers.

4.Calculate the NO concentration [NO]OUT needed to approximate 90% of the URL of the NO2 analyzer to be calibrated:

Equation 10-3

[NO]OUT = URL of analyzer (ppm) x 90/100

5.Calculate the NO flow (FNO) required to generate the NO concentration [NO]OUT:

Equation 10-4

FNO=	[NO]OUT x FT
	[NO]STD

6.Calculate the required flow through the ozone generator (FO):

Equation 10-5

Fo =	[NO ]STD X FNO X V RC	- FNO
	2.75 ppm - min

7.Verify that the residence time (tR) in the reaction cell is <2 min:

Equation 10-6

tR =	VRC	≤ 2min
	FO + FNO

8.Verify that the dynamic parameter specification (PR) of the calibrator's reaction cell is >2.75 ppm-min:

Teledyne Analytical Instruments 226