Appendix I to Part 204

Appendix I to Part 204

Table I - Sample Size Code Letters

Batch size	Code letter
4 to 8	A.
9 to 15	B.
16 to 25	C.
26 and larger	D.

Table II - Sampling Plans for Inspecting Batches

Sample size code letter	Test sample	Test sample size	Cumulative test sample size	Batch inspection criteria
				Acceptance number	Rejection number
A	1st	4	4	0	1
B	1st	3	3	0	1
C	1st	3	3	0	2
	2d	3	6	1	2
D	1st	2	2	(1)	2
	2d	2	4	(1)	2
	3d	2	6	0	2
	4th	2	8	0	3
	5th	2	10	1	3
	6th	2	12	1	3
	7th	2	14	2	3

¹ Batch acceptance not permitted at this sample size.

Table III - Batch Sequence Plans

Sample size code letter	Number batches	Cumulative number batches	Sequence inspection criteria
			Acceptance number	Rejection number
A	2	2	1	(1)
	2	4	2	4
	2	6	3	5
	2	8	4	5
B	2	2	0	(1)
	2	4	1	4
	2	6	2	5
	2	8	3	5
	2	10	4	6
	2	12	5	6
C	2	2	(2)	2
	2	4	0	2
	2	6	0	3
	2	8	1	3
	2	10	2	4
	2	12	3	4
D	2	2	0	2
	2	4	1	3
	2	6	2	4
	2	8	3	4

¹ Batch sequence rejection not permitted for this number of batches.

² Batch sequence acceptance not permitted for this number of batches.

Table IV - Recommended Format for Portable Air Compressor Noise Data Sheet

Test report number:
Subject:
Manufacturer:		Model:	Serial No.:
Rated speed:	Rpm:	Rated capacity:		cfm (m3/in).
Configuration identification:		Category identification:
Portable air compressor identification No.:		Build date:
Test conditions:
Manufacturer's test site identification and location:
Reflecting plane composition:
Operating speed as tested:
Beginning of test	rpm
End of test	rpm
Air pressure supplied:	psi (kg/cm2)	Ambient wind speed______mph (km/hr)
Actual flow rate:	cfm (m3/min.)	Atmospheric pressure______psi (kg/cm2)
Temperature:	°F (°C)
Instrumentation:
Microphone Manufacturer:		Model No.:	Serial No.:
Sound Level Meter Manufacturer:		Model No.:	Serial No.:
Calibrator Manufacturer:		Model No.:	Serial No.:
Other and Manufacturer:		Model No.:	Serial No.:
Data:

Sound levels (decibels)	Background sound level at location 1 (decibels)	Location
		1	2	3	4	5	Average sound level (decibels)
A-Weighted
Tested by:						Date:
Reported by:						Date:
Supervisory personnel:					Title:
					Title: