1、 Printed Copies are Uncontrolled Page 1 of 7 Standard Number w-SX1Issue Date: 20010219Global Manufacturing Standards Rev: SOUND LEVEL STANDARD FOR MACHINERY AND EQUIPMENT 1.0 SCOPE w-SX1 Sound Level Standard for Machinery and Equipment is a manufacturing standard aimed at protecting the hearing heal
2、th of Ford employees by ensuring that when machinery and equipment is purchased and installed it is designed and constructed so as to achieve sound levels as low as reasonably practicable. The standard defines maximum acceptable sound level limits for all machinery and equipment purchased by Ford or
3、 fabricated for installation or use (both production and non-production). Procedures for sound level measurements and reporting of data, supplier and purchaser responsibilities, and deviations from the requirements are established in the standard. w-SX1 applies to all Company facilities unless local
4、ly applicable requirements are more restrictive. 2.0 REFERENCES ANSI S1.43-1997, Specification for Integrating-Averaging Sound Level Meters ANSI S1.40-1984 (R1997), Specifications for Acoustical Calibrators IEC 60804, Integrating-Averaging Sound Level Meters IEC 60942, Electroacoustics Sound Calibra
5、tors BS EN 60804, Specification for Integrating- Averaging Sound Level Meters BS7189 1989 Acoustic Calibrators 3.0 REQUIREMENTS 3.1 Sound levels produced by all equipment, systems, and tools under full rated load or under production conditions at the operators position and all points 1 meter from th
6、e equipment and beyond, shall not exceed 80 decibels (dBA) time-weighted average. 3.2 Impulse sound levels, as measured at the same locations selected in 3.1, shall not exceed 140 dB unweighted peak response. 3.3 Sound measurements, instrumentation, and reporting of test data shall be in accordance
7、with the Test Procedure (Section 6). 3.4 Sound level measurements shall be the responsibility of the supplier. Supplier responsibility extends to all components of the complete system, such as motors and hydraulic units which may have been provided by others. Sound level measurement data shall be su
8、bmitted to the requisitioning activity prior to shipment. See Section 7 for documentation. Printed Copies are Uncontrolled Page 2 of 7 Standard Number w-SX1Issue Date: 20010219Global Manufacturing Standards Rev: 3.4.1 For standard machine components not built to Ford specifications, generic sound le
9、vel data from the original equipment manufacturer (OEM) will be accepted. The OEM data will not relieve the supplier of responsibility for conformance to the sound level specification. 3.5 Design changes that reduce sound levels are preferred over enclosures and curtains, which are considered soluti
10、ons of last resort. 4.0 DEVIATION FROM REQUIREMENTS 4.1 If equipment exceeds or is expected to exceed the applicable sound level limit required by this standard, the supplier must complete a Request for Deviation Form (Attachment C), which includes the following: 4.1.1 A report of the measured sound
11、 levels for the equipment as required in Section 6 Test Procedures, 4.1.2 Details of the feasible engineering controls currently designed into and/or installed on the equipment. 4.1.3 Justification of the technological or economic unfeasibility of complying with Manufacturing Standard w-SX1. 4.2 The
12、 Request for Deviation Form must be submitted to the Plant/Facility Manager or designee and the assigned staff engineering function (if applicable) for acceptance. 5.0 INSTRUMENTATION 5.1 A calibrated integrating sound level meter (certified by the manufacturer or a qualified laboratory within the l
13、ast twelve months) shall be used to make all measurements. The calibration will be verified in accordance with 6.5. The instrument shall be set to: 5.1.1 Integrate all continuous, intermittent and impulsive sound levels, using a 3 dB exchange rate, A-weighted network and slow averaging response for
14、the average sound level (Lave) readings, 5.1.2 Use the linear (flat) scale and peak response settings for impulse sound level readings, 5.1.3 Integrate sound level measurements with no lower limit threshold sound level restriction. Printed Copies are Uncontrolled Page 3 of 7 Standard Number w-SX1Iss
15、ue Date: 20010219Global Manufacturing Standards Rev: 6.0 TEST PROCEDURE 6.1 Locations for the sound level measurements shall be taken at representative points on the measurement envelope. The measurement envelope shall be located 1 meter from the periphery of the equipment at a height of 1.5 meters
16、above floor, sub floor, or platform level. 6.1.1 Test sites shall be located at the operators position and at sufficient locations around the measurement envelope to permit determination of the directional characteristics of the sound emissions. The measurement locations shall not be more that 3 met
17、ers from adjacent measurement location(s) and shall consist of at least four (4) measurements around the machine/equipment, plus the operator location(s) and the location with the highest sound level. 6.1.2 Locations beyond the measurement envelope shall be included where suspected reflected sound l
18、evels contribute adversely to the overall level (e.g. enclosed machines with open tops that may have noise reflected from the ceiling). 6.2 Background Sound Levels When background sound levels are less than10 dBA below levels measured with the equipment operating, correction factors shall be used in
19、 accordance with the following table: Correcting for Ambient DIFFERENCE BETWEEN MEASURED LEVEL AND AMBIENT LEVEL (dBA) TO BE SUBTRACTED FROM MEASURED LEVEL (dBA) 3 or Less Test conditions unacceptable 4 2.0 5 1.5 6 1.0 7 1.0 8 1.0 9 0.5 10 or Greater 0.0 6.3 Equipment Operating Conditions 6.3.1 Soun
20、d levels shall be measured during the simultaneous operation of all components and applicable accessories when running under all anticipated operating conditions. Printed Copies are Uncontrolled Page 4 of 7 Standard Number w-SX1Issue Date: 20010219Global Manufacturing Standards Rev: 6.3.2 Production
21、 equipment shall be sampled as follows: Unloaded (Cycling with No Parts): Measurements shall be made at all probable unloaded modes such as idle or maximum traverse. Loaded (Cycling with Parts): Measurements shall also be made at the various rated load modes, unless otherwise specified. 6.3.3 If ins
22、ufficient parts are available, the tooling or equipment supplier is required to defer monitoring to the plant floor. 6.4 Measurements 6.4.1 Each measurement shall be at least 2-minutes in duration or longer where necessary to allow the time-weighted-average (TWA) sound level meter reading to stabili
23、ze. In general, this means that at least 3 complete equipment cycles are included in the sample. 6.4.2 All measurements shall be conducted by a competent individual, who by virtue of training or experience, is familiar with the use of sound level meters. 6.5 Instrument Calibration Verification The c
24、alibration of the sound level meter shall be verified with an acoustic calibrator at the beginning of each measurement session. This shall be done in accordance with the sound level meters operation manual. 7.0 DOCUMENTATION A plot plan showing the equipment, its auxiliary/satellite components, the
25、measurement envelope, and all test points (see example in Attachment B) shall accompany the Equipment Sound Level Data Form (Attachment A). The Request for Deviation Form (Attachment C) shall be completed and signed when requirements of w-SX1 cannot be met. Refer to those attachments for details. Al
26、l attachments shall be included in the equipment acceptance (buy-off) documentation. 8.0 INDUSTRY STANDARD ORDERING INFORMATION: All applicable standards can be found at the Ford Motor Company Reference Library via the following website. http:/ Select RLIS Global Standards Service, then Industry Sta
27、ndards. Attachment A - Equipment Sound Level Data Form Supplier must provide all information requested in accordance with the w-SX1 Test Procedure. A plot plan showing equipment and all auxiliary/satellite components, the measurement envelope, and locations where noise readings were taken must be in
28、cluded with this Equipment Sound Level Data Form. Customer (Plant/Operation): _ Purchase Order Number: _ Supplier: _ EQUIPMENT BEING MEASURED Manufacturer: _ Model Number_ Name/Description: _ Other (including list of auxiliary equipment): _ Description of test space (including equipment location): _
29、 _ Description of operating conditions: _ TEST DATA Test Point Background Level (dBA) Level w/Machine Operating (dBA) Loaded/Unloaded Sample Duration min/sec Correction Factor (dBA) Corrected Sound Level (dBA) Peak Level (dB) Sound Level Measurement Instrumentation Manufacturer Model Serial Number C
30、alibration Date Calibration Due Date ALL DATA CERTIFIED TRUE AND ACCURATE BY: Name_ Position_ Company_ Date _ Printed Copies are Uncontrolled Page 6 of 7 Standard Number w-SX1Issue Date: 20010219Global Manufacturing Standards Rev: Attachment B Sample Equipment Plot Plan (To accompany Equipment Sound
31、 Level Data Form) 8 * 3 * 4 * 5 * 6 * 7 * 9 2 * 10 * 1 * 11 * 12# 21 * 13 * 19 * 20# 14 * 18 * 16 * 15 * 17# * Test points, along measurement envelope, at which noise measurements were taken. * Operator position * Test point with highest sound level. # Beyond 1 meter from the equipment (to measure r
32、eflected sound if applicable) Printed Copies are Uncontrolled Page 7 of 7 Standard Number w-SX1Issue Date: 20010219Global Manufacturing Standards Rev: Attachment C Request for Deviation Form If equipment exceeds or is expected to exceed the applicable sound level limit required by w-SX1 Sound Level
33、Standard for Machinery and Equipment, the supplier must provide the following information: 1. All information requested in accordance with the w-SX1 Test Procedure: A completed Equipment Sound Level Data Form; and A plot plan showing equipment and all auxiliary/satellite components, “Measurement Env
34、elope,“ and locations where noise readings were taken. 2. A description of the feasible engineering controls currently designed into and/or installed on the equipment. _ 3. Justification for the technological or economic unfeasibility of complying with w-SX1. _ ACCEPTANCE OF REQUEST FOR DEVIATION This information has been reviewed and accepted as a deviation from w-SX1 Sound Level Standard for Machinery and Equipment. _ _ Plant/Facility Manager or Designee Staff Engineering Function (if applicable) Date _ Date _
