40CFR 1065 Compliance

Parameters	Current 40CFR 1065 Permissible Limit	MODEL BG-3
Accuracy of Dilution Air Flow	+/- 2% of reading	+/- 1.5% of reading
Accuracy of Diluted Exhaust Gas Flow	+/- 2% of reading	+/- 1.5% of reading
System Response time	=< 0.5 second	0.3 second
Input method of Exhaust gas 1.Direct method Any of the 4 mass flow	1.Direct method 2.Air & fuel measurement methods@(Gexhw = Gairw + Gfuel) 3.Tracer measurement method 4.Air flow and air to fuel ratio measurement method	Any of the 4
Proportionality	Correlation coefficient R2 of the linear regression between Gp,i and GEXH,i shall not less than 0.9. The standard error of estimate of Gp,i on GEXH,i shall not exceed 5% of Gp maximum. Gp intercept of the regression line shall not exceed +/- 2% of Gp maximum.	>0.98
Filter size	Particulate filters must have a minimum diameter of 47mm. Larger diameter filters are acceptable.	1-2% Meets requirement
Primary and back-up filters	The diluted exhaust shall be sampled by a pair of filters placed in series (one primary and one secondary) during the test sequence.	47mm, 70mm
Filter face velocity	A gas face velocity through the filter of 35 to 100 cm/s The pressure drop increase between the beginning and the end of the test shall be no more than 25kPa.	Meets requirement
Filter loading	Minimum filter loading shall be 0.25 mg for filter size of 70mm and below.	Meets requirement
Accuracy of Gtotw	+/- 2%	Meets requirement
Accuracy of Gdilw	+/- 2%	+/- 2% or less
Additional specifications	All parts of the dilution system in contact with raw and diluted exhaust gas must be designed to minimize deposition or alteration of the particulates.	+/- 2% or less
SP Sampling probe	The minimum I.D. shall be 4mm. The minimum diameter ratio between exhaust pipe and probe shall be 4.	Meets requirement True down to 1.0" exhaust pipe
Type of probe	Open tube facing to upstream or downstream, or multiple hole or hatted probe facing to upstream	All

ISO 16183 Compliance

Parameters	Current ISO DIS 16183 Permissible Limit	MODEL BG-3
Accuracy of Dilution Air Flow	+/- 2% of reading	+/- 1.5% of reading
Accuracy of Diluted Exhaust Gas Flow	+/- 2% of reading	+/- 1.5% of reading
System Response time	=< 0.5 second	0.3 second
Input method of Exhaust gas 1.Direct method Any of the 4 mass flow	1.Direct method 2.Air & fuel measurement methods@(Gexhw = Gairw + Gfuel) 3.Tracer measurement method 4.Air flow and air to fuel ratio measurement method	Any of the 4
Proportionality	Correlation coefficient R2 of the linear regression between Gp,i and GEXH,i shall not less than 0.9. The standard error of estimate of Gp,i on GEXH,i shall not exceed 5% of Gp maximum. Gp intercept of the regression line shall not exceed +/- 2% of Gp maximum.	>0.98
Filter size	Particulate filters must have a minimum diameter of 47mm. Larger diameter filters are acceptable.	1-2% Meets requirement
Primary and back-up filters	The diluted exhaust shall be sampled by a pair of filters placed in series (one primary and one secondary) during the test sequence.	47mm, 70mm
Filter face velocity	A gas face velocity through the filter of 35 to 100 cm/s The pressure drop increase between the beginning and the end of the test shall be no more than 25kPa.	Meets requirement
Filter loading	Minimum filter loading shall be 0.25 mg for filter size of 70mm and below.	Meets requirement
Accuracy of Gtotw	+/- 2%	Meets requirement
Accuracy of Gdilw	+/- 2%	+/- 2% or less
Additional specifications	All parts of the dilution system in contact with raw and diluted exhaust gas must be designed to minimize deposition or alteration of the particulates.	+/- 2% or less
SP Sampling probe	The minimum I.D. shall be 4mm. The minimum diameter ratio between exhaust pipe and probe shall be 4.	Meets requirement True down to 1.0" exhaust pipe
Type of probe	Open tube facing to upstream or downstream, or multiple hole or hatted probe facing to upstream	All