1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. SABS1650*ICS 75.180.30ISBN 0-626-13217-7*This standard references other standardsEdition 1.11996SOUTH AFRICAN STANDARDSpecificationLiquid fuel dispensers
4、SABS 1650Consolidated edition incorporating technical corrigendum No. 1 : 7 March 1996Published byTHE SOUTH AFRICAN BUREAU OF STANDARDSGr 12SABS 1650Ed. 1.1Amendments incorporated since the publication of SABS 1650:1995Amdt No. Date ScopeTech. corr.11996-03-07 Has been amended to correct subclause 4
5、.5.2.3 and to change the lastsentence of subclause B.2.2.6.2.ICS 75.180.30 SABS 1650Ed. 1.1SOUTH AFRICAN BUREAU OF STANDARDSSPECIFICATIONLIQUID FUEL DISPENSERSObtainable from theSouth African Bureau of StandardsPrivate Bag X191PretoriaRepublic of South Africa0001Telephone : (012) 428-7911Fax : (012)
6、 344-1568E-mail : salessabs.co.zaWebsite : http:/www.sabs.co.zaCOPYRIGHT RESERVEDPrinted in the Republic of South Africa by theSouth African Bureau of StandardsSABS 1650Ed. 1.1iiNoticeThis standard was approved in accordance with SABS procedures on 9 October 1995.NOTE 1 In terms of the Standards Act
7、, 1993 (Act 29 of 1993), no person shall claim or declare that he or any otherperson complied with an SABS standard unlessa) such claim or declaration is true and accurate in all material respects, andb) the identity of the person on whose authority such claim or declaration is made, is clear.NOTE 2
8、 It is recommended that authorities who wish to incorporate any part of this standard into any legislation in themanner intended by section 31 of the Act consult the SABS regarding the implications.This standard will be revised when necessary in order to keep abreast of progress. Comment will bewelc
9、ome and will be considered when the standard is revised.ForewordA vertical line in the margin shows where the text has been modified by technical corrigendum No. 1.Annexes A, B and C form an integral part of this standard.IntroductionThe attention of both users and manufacturers of liquid fuel dispe
10、nsers covered by this standard isdrawn to the requirements of the Trade Metrology Act, 1973 (Act 77 of 1973), and the fact that it isincumbent upon them to comply with this Act when liquid fuel dispensers are sold or used for tradepurposes. Any SA approval number issued in terms of the Act shall not
11、 be considered as approval toapply the SABS mark nor shall it be construed to imply that the SABS mark is applicable. Theadministration of the Act is the responsibility of the Division of Trade Metrology of the South AfricanBureau of Standards.Attention is drawn to the normative reference givenin cl
12、ause 2 of this standard. This reference isindispensable for the application of this standard.ISBN 0-626-13217-7SABS 1650Ed. 1.1iiiContentsPageNotice iiForeword . iiIntroduction . iiCommittee vi1 Scope . 12 Normative reference . 13 Definitions 14 Requirements . 34.1 Principles. 34.2 Units of measurem
13、ent. 34.3 Permissible tolerance on indication 44.4 Tolerances for tests that are supplementary to theefficiency tests. 44.5 Technical requirements for design and construction . 54.6 Installation 135 Inspection and methods of test . 135.1 Sequence of testing 135.2 Verification standards . 135.3 Gener
14、al test conditions 135.4 Inspection 145.5 Initial efficiency tests 145.6 Final efficiency test . 165.7 Tests for variations due to influence factors anddisturbances 166 Marking 176.1 Descriptive marking. 176.2 Minimum delivery 186.3 Verification marks 187 Metrological controls . 19AnnexesA Type appr
15、oval of liquid fuel dispensers . 20B Verification of liquid fuel dispensers . 24C Responsibilities of users of dispensers that fall within thescope of this standard 28SABS 1650Ed. 1.1*) This committee was responsible for the 1995 edition of the standard.ivCommittee*)SABS . BE Beard(Chairman)SFC Lash
16、mar(Standards writer)HJ Patrick(Committee clerk)AG Walker (Pty) Ltd AT CalitzBP Southern Africa (Pty) Ltd . A PawleySA StevenCaltex Oil (SA) (Pty) Ltd. NE CharmanCSIR AH van TonderDresser Limited, Wayne Division . DN HillebrandSABS . J van den HeeverSasol Oil. J FriedmanShell South Africa (Pty) Ltd
17、H KrugerJW van der WesthuizenTokheim SA (Pty) Ltd. A AhlersCP VenterUniversal Fueling Systems BJG Kirstein1SPECIFICATION SABS 1650Edition 1.1Liquid fuel dispensers1 Scope1.1 This standard specifies the metrological and technical requirements for liquid fuel dispensers thatare subject to official met
18、rological control.1.2 It gives requirements for metrological controls, including type approval of liquid fuel dispensersfor trade purposes.NOTE - The Trade Metrology Act, 1973 (Act 77 of 1973), regulates the use of liquid fuel dispensers for trade purposes.2 Normative referenceThe following standard
19、 contains provisions which, through reference in this text, constitute provisionsof this standard. All standards are subject to revision and, since any reference to a standard is deemedto be a reference to the latest edition of that standard, parties to agreements based on this standardare encourage
20、d to take steps to ensure the use of the most recent edition of the standard indicatedbelow. Information on currently valid national and international standards can be obtained from theSouth African Bureau of Standards.SABS 1020, The electrical components of free-standing power-operated dispensing d
21、evices forflammable liquids.3 DefinitionsFor the purposes of this standard, the following definitions apply:3.1 disturbance: An influence quantity that has a value within the limits specified in this standard,but outside the rated operating conditions of the dispenser.3.2 electronic device: A device
22、 that has electronic subassemblies and that performs a specificfunction.NOTE - An electronic device is usually manufactured as a separate unit and is capable of being independently tested.3.3 electronic dispenser: A dispenser that is equipped with electronic devices.SABS 1650Ed. 1.123.4 gas separato
23、r: Apparatus that is used for continuously separating, and for removing bymeans of an appropriate device, any air or gases contained in the liquid.3.5 indications and errors3.5.1 analogue indication: An indication in which the scale marks are a sequence of alignedfigures that permit interpolation to
24、 a fraction of a scale interval.3.5.2 digital indication: An indication in which the scale marks appear in a discontinuousmanner and are composed of a set of aligned numbers that indicate the numerical value of thequantity measured.3.5.3 error (of indication): The difference between the result of me
25、asurement (the indicationof the instrument) and the calculated value (for example, the indicated volume of the standard).NOTE - An over-registration of the dispenser being tested will result in an under-delivery of the product being measured.3.5.4 maximum permissible tolerance: The maximum differenc
26、e, positive or negative,permitted between the indication of a dispenser and the corresponding true value, as determined byverification standard measures.3.6 indicator: The analogue or digital part of a measuring assembly that displays a volumemeasurement and that can also display the monetary value
27、per unit of volume and the resultantmonetary value of the transaction in units of currency.3.7 influence factor: An influence quantity that has a value within the specified rated operatingconditions of the dispenser.3.8 influence quantity: A quantity that is not the subject of the measurement but th
28、at influencesthe value of the measurand or the indicating of the dispenser.3.9 liquid fuel dispensers (dispensers)3.9.1 dispenser: A measuring assembly that comprises a pump, a meter and ancillary equipmentfor the measurement and delivery of liquids as approved during the type approval into the tank
29、s ofvehicles, boats or small aircraft or into other receptacles.3.9.2 high flow rate dispenser: A dispenser type approved to operate at flow rates exceeding100 L/min.3.9.3 standard flow rate dispenser: A dispenser type approved to operate at flow rates upto and including 100 L/min.NOTE - If several
30、meters intended for separate measuring operations operate in conjunction with common components,each meter is considered as forming, with the common components, a liquid fuel dispenser. If several meters are intendedfor a single measuring operation, the meters are considered as forming a single disp
31、enser.3.10 liquid meter (meter): A device that is designed and constructed to measure the volumeof liquid passed through it in a continuous stream.3.11 maximum flow rate: The maximum rate of flow at which the liquid fuel dispenser candeliver under normal conditions of use.SABS 1650Ed. 1.133.12 scale
32、 interval: A value that is the difference between:a) the values corresponding to two consecutive scale marks on an analogue indication; orb) two consecutive indicated values on a digital indication.3.13 totalizer: A non-resettable indication of the total volume of liquid passed through thedispenser,
33、 or the monetary value of such liquid.3.14 warm-up time: The time between the moment that power is applied to a dispenser and themoment at which the dispenser is not adversely affected by the warming-up of the electroniccomponents.3.15 zero-setting: The means used to set the indicator to zero.4 Requ
34、irements4.1 Principles4.1.1 Principles of the metrological requirementsThe metrological requirements of this standard shall apply to all dispensers, regardless of theirprinciples of measurement.4.1.2 Principles of the technical requirementsThe general technical requirements of this standard shall ap
35、ply to all types of dispensers, whethermechanical or electronic, and may be modified with additional requirements for dispensers that areused for specific applications or designed for a special technology. The requirements are intended tospecify the performance, not the design of a dispenser, so tha
36、t technical progress is not impeded.In particular, functions of electronic dispensers that are not covered by this standard should beconsidered to be allowed if they do not interfere with the metrological requirements.4.1.3 Application of requirementsThe requirements of this standard shall apply to
37、all devices that perform the relevant functions,whether the devices are incorporated in a dispenser or manufactured as separate units and combinedto form a dispenser.Examples are: pump;meter; andindicating device.However, peripheral devices, such as printers, that are not incorporated as an integral
38、 part of thedispenser will not form part of the type approval. In such cases, the data interface or communicationsport incorporated in the dispenser shall comply with the requirements of 4.5.3.4.2 Units of measurementThe only unit of volume in which the dispenser can measure shall be the litre (L).S
39、ABS 1650Ed. 1.144.3 Permissible tolerance on indication4.3.1 Basic rules concerning the application of tolerances4.3.1.1 Influence factorsErrors shall be determined under normal test conditions. When the effect of one factor is beingevaluated, all other factors shall be kept relatively constant, at
40、a value close to normal. 4.3.1.2 Permissible differences between resultsRegardless of whether or not the delivery is started from zero, the error of any single measurementresult shall in itself not exceed the maximum permissible tolerance for the given volume.4.3.1.3 Dispensers with more than one in
41、dicating deviceFor any given indication, the difference between the indications of multiple-indicating devices shall notexceed one-quarter of the smallest scale interval of the first indicating element, but shall be zerobetween digital indicating or printing devices.4.3.2 Tolerance on indication dur
42、ing initial efficiency testWhen a dispenser is tested in accordance with 5.5, the error shall not exceed 0,25 %, irrespective ofthe volume delivered or the flow rate prescribed for the test.4.3.3 Tolerance on indication during final efficiency testWhen a dispenser is tested in accordance with 5.6, a
43、ny increase or decrease in the error of indicationfrom that recorded during the tests in 5.5 shall not exceed 0,25 %.4.4 Tolerances for tests that are supplementary to the efficiency tests4.4.1 Efficiency tolerance of gas separatorWhen the efficiency of the gas separator is determined by the introdu
44、ction of air or gas to the pumpinlet, the effect on the accuracy of the dispenser shall not exceed 100 mL, irrespective of the volumeof liquid delivered.NOTE - For technical requirements, see 4.5.4.3.4.4.2 Back drainage toleranceThere shall be no advancement in excess of 9 mL on the indicator when t
45、he dispenser is switched onafter having been switched off for at least 5 min and without any liquid having been drained from thenozzle.NOTE - For technical requirements, see 4.5.5.4.4.3 Nozzle burst toleranceWhen the nozzle is opened immediately after the dispenser has been switched off, the nozzle
46、burst(liquid discharged) shall not exceed:a) 30 mL in the case of dispensers fitted with nozzles of nominal bore not exceeding 25 mm; andSABS 1650Ed. 1.15b) 50 mL in the case of high flow rate dispensers fitted with nozzles of nominal bore exceeding 25 mm.NOTE - For technical requirements, see 4.5.8
47、.4.4.4 Pre-setting device toleranceWhen a pre-setting device used with a dispenser is tested for efficiency, there shall, in the case ofdigital indication, be no difference between the indicated quantity delivered and the pre-set values.In the case of analogue indication, any difference shall not ex
48、ceed one-quarter of the smallest scaleinterval of the first element of the quantity or price-to-pay indicator, whichever is applicable. NOTES1 For technical requirements, see 4.5.11.2 Only pre-setting devices that form an integral part of the dispenser will be evaluated during type approval.4.4.5 To
49、talizing counter toleranceTotalizing counters shall correspond with the sum of all volumes or price-to-pay values indicatedsuccessively by the indicator of the dispenser.NOTE - For technical requirements, see 4.5.2.4.4.4.6 Electromagnetic susceptibility tolerancesWhen an electronic dispenser is subjected to electromagnetic disturbances in accordance with 5.7.2,any difference between the volume (and, where fitted, monetary value) indications with and withoutthe disturbances shall not exceed the smallest scale intervals of the indicator. No other operationalfunction of the dispenser shall be a
