1、Designation: D5337 11 (Reapproved 2016)Standard Practice forFlow Rate Adjustment of Personal Sampling Pumps1This standard is issued under the fixed designation D5337; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice describes the calibration of samplingpumps commonly used for monitoring personal airborne ex-posures in the
3、work-place.1.2 This practice includes procedures for describing primaryand secondary calibration techniques.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety conce
4、rns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1356 Terminology Relating to Sampling a
5、nd Analysis ofAtmospheres2.2 NIOSH and OSHA Documents:HSM-99-71-31 Personal Sampling Pump for CharcoalTubes; Final Report3NIOSH Manual of Analytical Methods, 4thed.4OSHA Analytical Methods Manual53. Terminology3.1 For definitions of terms used in this practice, refer toTerminology D1356.3.2 The term
6、 primary flow-rate calibration, as used in thispractice, does not imply the calibration is traceable to aprimary standard, unless the apparatus used in the calibration(burets, stop-watches, etc.) has been demonstrated to betraceable to national or international standards, and that thistraceability i
7、s established on a routine (generally annual) basis.Traceability of calibration is strongly recommended.4. Summary of Practice4.1 Abubble tube meter or electronic near-frictionless pumpis used for primary calibration of personal sampling pumps.The practice is applicable to systems using air sampling
8、devices. Provisions are made for both manual and automatedbubble meters.4.2 Secondary calibration procedures for field applicationsare also included in the practice (see 7.3).5. Significance and Use5.1 Most occupational exposure assessment methods re-quire the use of personal sampling pumps to colle
9、ct air samplesat typical workplace sampling rates, with sampling volumesspecified by (a) particular procedure(s). The precision and biasof these methods are directly affected by the precision and biasof the pumps used to measure the air volume(s) sampled.6. Apparatus6.1 Burets, 1-L (for high flow) a
10、nd 100-mL or 10 mL (forlow flow).6.2 Manometer.6.3 Rotameter.6.4 Stop Watch.6.5 Electronic Bubble Meter or Near-frictionless PistonFlowmeter (alternates), should have traceable calibration (see3.2).7. Procedure7.1 Calibrate the personal sampling pumps before andmeasure after each days sampling.7.2 P
11、rimary Flow-Rate Calibration Device(s) (as noted in3.2, these are not primary standards unless the apparatus usedin the calibration has been demonstrated to be traceable tonational and international standards):1This practice is under the jurisdiction of ASTM Committee D22 on Air Qualityand is the di
12、rect responsibility of Subcommittee D22.04 on Workplace Air Quality.Current edition approved Nov. 1, 2016. Published November 2016. Originallyapproved in 1992. Last previous edition approved in 2011 as D5337 11. DOI:10.1520/D5337-11R16.2For referenced ASTM standards, visit the ASTM website, www.astm
13、.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from the U.S. Department of Commerce, National Technical Infor-mation Service, Port Royal Road, Springfield, VA 22
14、161.4Centers for Disease Control and Prevention (CDC), National Institute forOccupational Safety and Health (NIOSH), Cincinnati, Ohio (1994); Available fromNIOSH Publications, 4676 Columbia Parkway, Cincinnati, Ohio 45226;www.cdc.gov/niosh/nmam.5Occupational Safety and Health Administration, Salt La
15、ke Technical Center,Salt Lake City, Utah (1985); Available from OSHA Analytical Laboratory, 8660 S.Sandy Parkway, Sandy, UT 84070; www.osha.gov/dts/sltc/methods.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17.2.1 Bubble Meter Method
16、:7.2.1.1 Allow the pump to run five minutes prior to calibra-tion to stabilize pump.7.2.1.2 Connect pump to an appropriate sampling train.Sampling trains identical to that used in sampling for sorbenttubes, filter cassettes, and cyclones are shown in Figs. 1-3.7.2.1.3 Check all connections to insure
17、 their integrity.7.2.1.4 Wet the inside surface of the 1-L buret with the soapsolution (use a 100-mL buret for low flow pumps).7.2.1.5 Turn on the pump and momentarily submerge theopening of the buret into the soap solution to form a bubble.7.2.1.6 With a stop watch, time the travel of a single film
18、from the zero mark to the calibrated volume mark. Note thetime and repeat this procedure at least three times.7.2.1.7 Calculate the flow rate using the formula:Flow Rate L/min! 5Volume L!Time min!(1)7.2.1.8 If using a pump equipped with a rotameter, recordthe position of center of the float that cor
19、responds with the flowrate. The rotameter can then be used as an approximateindicator of flow-rate during the sampling period.7.2.1.9 An automated electronicbubble flow meter may beused in place of manual types. The flow meter has an electronictimer that measures the time taken for the bubble to mov
20、ethrough a defined volume producing a direct read-out offlow-rate.7.2.2 Electronic Near-Frictionless Piston MethodAllowthe pump to stabilize and connect to an appropriate samplingtrain as in 7.3, Figs. 1-3 except that the soap bubble meter isreplaced by a near-frictionless piston flow-meter. The flo
21、wmeter has an electronic timer that measures the time taken forthe piston to move through a defined volume producing a directread-out of flow-rate.7.3 Secondary Flow-rate Calibration Devices:7.3.1 Set up a calibration apparatus appropriate for thesample collector to be used. See Figs. 1-3.7.3.2 Plac
22、e the secondary calibration device (for example,rotameter) in line, between the bubble meter and sampler,connecting the inlet of the secondary calibrator to the outlet ofthe bubble meter and the outlet of the sampler.7.3.3 Adjust the pump to the desired flow rate.7.3.4 Determine the exact flow rate
23、as described in 7.2.Record the calibration flow rate and the corresponding readingon the secondary calibration device.7.3.5 Calibration over the range of the sampling flow ratesis necessary if the secondary sampling pump calibration deviceis required. Calibrate the secondary calibrator at each flow
24、rateFIG. 1 Calibration Setup for Personal Sampling Pump with FilterCassetteFIG. 2 Calibration Setup for Personal Sampling Pump with Sam-pling TubeNOTE 1Other cyclones may require different setups.FIG. 3 Calibration Setup for Personal Sampling Pump with a10-mm Nylon Cyclone Respirable Dust Sampler Us
25、ing a BubbleMeterD5337 11 (2016)2with the bubble meter. Prepare a calibration graph across therange of flow rates of interest.7.3.6 Calibrate secondary devices subsequent to shippingfrom one location to another, or whenever the integrity of thedevice is questioned.7.3.7 Once calibrated, the secondar
26、y calibration device canbe used to replace the bubble meter for calibrating pumps; thisis accomplished by attaching the outlet of the calibrationdevice to the inlet of the sampling system.8. Keywords8.1 air monitoring; flow rate calibration; personal samplingpumps; sampling and analysis; workplace a
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31、veaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 11 (2016)3
