ASTM E1129 E1129M-2008e1 Standard Specification for Thermocouple Connectors《热电偶连接器的标准规程》.pdf

1、Designation: E 1129/E 1129M 081Standard Specification forThermocouple Connectors1This standard is issued under the fixed designation E 1129/E 1129M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of last revision. A numbe

2、r in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEThe year date was corrected editorially in July 2009.1. Scope1.1 This specification covers separable single-circuit ther-mocouple connectors with t

3、wo round pins. Connectors coveredby this specification must be rated for continuous use to at least300 F (150 C), but they may optionally be rated higher.1.2 This specification does not cover multiple-circuit con-nectors, multi-pin connectors, miniature connectors, or connec-tors intended primarily

4、for panel mounting. High temperatureconnectors (for example, those designed for continuous use attemperatures above approximately 500 F (260 C) are notintended to be covered by this specification.1.3 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.1.

5、4 The following precautionary statement pertains only tothe test method portion, Section 9, of this specification. Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety

6、 and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 The following documents of the latest issue form a partof this specification to the extent referenced herein. In case ofconflict between this specification and another referenceddo

7、cument, this specification shall take precedence.2.2 ASTM Standards:2E 230 Specification and Temperature-Electromotive Force(EMF) Tables for Standardized ThermocouplesE 344 Terminology Relating to Thermometry and Hydrom-etryE 608 Specification for Mineral-Insulated, Metal-SheathedBase Metal Thermoco

8、uples3. Terminology3.1 Definitions: The definitions given in Terminology E 344shall apply.3.2 Definitions of Terms Specific to This Standard:3.2.1 connector pair, nan assembly consisting of a plugand a jack, each having both positive and negative inserts, thatwill connect two parts of an electrical

9、circuit and provide ameans of physically disconnecting the two parts without theuse of tools.3.2.2 contact insert, nmetallic conductor assemblies that,when installed in connector bodies, provide connections be-tween two parts of an electrical circuit. Plug connectors willcontain projecting prong con

10、tacts, while jack connectors willcontain recessed socket or receptacle contacts.3.2.3 service life, ninterval of time that a connectorassembly will be put to use and retain all physical andthermoelectric properties.3.2.4 test difference, napparent thermoelectric differenceattributable to mated conne

11、ctors observed by the test procedureof this specification.4. Significance and Use4.1 The widespread use of thermocouple connectors re-quires standardization of mating dimensions and performancecharacteristics.4.2 This specification describes standardized thermocoupleconnector dimensions and capabili

12、ties and includes test proce-dures suitable for evaluating the performance of a particularspecimen or design. The tests described are not intended forroutine inspection or rapid testing of large groups of connectorsor for quality control purposes.5. Classification5.1 Plugs or Jacks:1This specificati

13、on is under the jurisdiction of ASTM Committee E20 onTemperature Measurement and is the direct responsibility of Subcommittee E20.04on Thermocouples.Current edition approved Nov. 15, 2008. Published January 2009. Originallyapproved in 1986. Last previous edition approved in 2002 as E 1129 98(2002).2

14、For referenced ASTM standards, visit the ASTM website, www.astm.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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C

15、700, West Conshohocken, PA 19428-2959, United States.5.1.1 Connectors shall be constructed as either plugs orjacks, and these two forms shall be designed to connect witheach other.5.1.2 Plug connectors shall have two external prong con-tacts of differing diameters to prevent improper mating. Thenega

16、tive prong shall be the larger, as shown in Table 1 and Fig.1.5.1.3 Jack connectors shall have two internal socket con-tacts sized and spaced to receive and accommodate the prongcontacts of the mating plug. Jack connectors shall also includea means of producing and maintaining sufficient contactpres

17、sure to meet all of the other requirements of this specifi-cation.5.2 ANSI/ASTM Type:5.2.1 Connectors shall be produced in versions to matcheach of the standardized ANSI/ASTM thermocouple types asgiven in Table 2.5.2.2 The insert materials of each plug and jack shall havethermoelectric properties co

18、nforming to the characteristics ofextension grade material of the corresponding thermocoupletype as given in Specification E 230 over the temperature rangespecified in Table 3.5.2.3 Calibration conformance and gradient testing is notapplicable to Type B thermoelectrically neutral (Cu/Cu) con-nectors

19、.6. Ordering Information6.1 Orders for connectors under this specification shallinclude the following:6.1.1 Quantity of plugs or jacks (specify which),6.1.2 ANSI/ASTM thermocouple type (see Table 2),6.1.3 Any optional accessories that may be required, such asthose listed in 7.4.3,6.1.4 Special testi

20、ng requirements, and6.1.5 Requirements for certificates of conformance to thespecifications or reports of the results of any required testing.7. Materials and Manufacture7.1 Body:7.1.1 The dimensions of the connector bodies shall fallwithin the limits given in Table 1.7.1.2 The connector body shall

21、be made of an electricallyinsulating material capable of continuous use at any tempera-ture between 0 F (-18 C) and 300 F (150 C) for the servicelife given in Table 2, without losing its ability to conform tothis specification.7.1.3 The connector bodies shall be color coded in accor-dance with Table

22、 2 to provide rapid and permanent identifica-tion of the thermocouple calibration with which it is designedto be used. Each plug and jack shall be permanently markedwith a symbol or symbols to identify positive and negativeconductor inserts.All connectors shall bear the suppliers nameor other means

23、of source identification, unless otherwisespecified in the purchasing documents.7.1.4 An insulating barrier shall be incorporated into eachconnector body to prevent inadvertent contact between ther-moelements or wires.7.2 Inserts:7.2.1 Contact inserts may be either solid or hollow as longas all of t

24、he requirements of this specification are met.TABLE 1 DimensionsDimension SymbolAMinimum,in. (mm)Maximum,in. (mm)Body length L . 1.505 (38.23)Body width W . 1.088 (27.64)Body thickness T . 0.515 (13.08)Length of prong P 0.535(13.59)0.650 (16.51)Depth of socket J 0.650(16.51).Prong spacing X 0.432(10

25、.97)0.442 (11.23)Positive pin D1 0.152 (3.86) 0.158 (4.02)diameterNegative pin D2 0.182 (4.62) 0.190 (4.83)diameterLocation of detent E 0.180 (4.57) 0.200 (5.08)Width of detent G 0.040 (1.02) .Depth of detent F 0.010 (0.25) 0.025 (0.64)ASymbols are according to Fig. 3.NOTEA solid prong is shown for

26、clarity of design.FIG. 1 Thermocouple Connector Dimensions, (see Table 1)TABLE 2 IdentificationANSI/ASTMTypeBody ColorCodingT BlueJ BlackE PurpleK YellowN OrangeR or S GreenB (Cu/Cu)AWhiteAUncompensated (Cu/CU) connectors are customarily used with Type Bthermocouples.E 1129/E 1129M 08127.2.2 Contact

27、 inserts shall be fabricated of materials thatmeet the requirements of Section 5.7.2.3 The inside diameter and depth of the jack connectorshall be such as to receive the corresponding plug prongsmoothly and easily when inserted. A spring loaded detentdevice shall be incorporated in the negative side

28、 of the jackconnector to engage the detent in the negative plug prong. Thefunction of the detent system shall be to cause positive lockingtogether of a plug and jack when fully mated. The detentsystem shall not permit the two connectors to be separated bymore than 0.03 in. (0.8 mm) when subjected to

29、 a withdrawalforce less than the minimum given in Table 3.7.2.4 The forces required for complete engagement ordisengagement shall be within the limits listed in Table 3.7.2.5 The connector pair shall be capable of repeatedinsertion and withdrawal cycles as given in Table 3 withoutlosing the ability

30、to conform to the requirements of thisspecification.7.2.6 The dimensions and locations of the inserts in theconnector bodies shall fall within the limits given in Table 1.7.2.7 The contact resistance between the assembled plugand jack shall conform to the requirements of Table 3.7.2.8 The connector

31、pair shall be capable of passing thethermal gradient test specified in Table 3.7.3 Construction and Assembly:7.3.1 Wire attachment shall be by means of a screw orclamp suitable for use with wire diameters from 30AWG (0.01in. or 0.25 mm in diameter) to 18 AWG (0.04 in. or 1.0 mm indiameter).7.3.2 Con

32、tact inserts and wire attaching parts shall be heldcaptive to one of the body parts.7.3.3 Connections and final closures of the connector shallbe accomplished with simple hand tools such as screwdrivers,wrenches, or pliers.7.3.4 The assembled connector shall be capable of passingthe insulation resis

33、tance requirements listed in Table 3 at thetemperatures listed.7.3.5 The materials and construction used in the connectorshall be such that the connector will meet all of the specifiedrequirements for the service life interval listed in Table 33.7.4 Optional Accessories:7.4.1 Connector accessories a

34、re not covered by this speci-fication and may be unique to a manufacturers specific design.7.4.2 All required optional accessories are to be specifiedseparately from the connectors.7.4.3 The following is a partial list of useful accessoryitems:7.4.3.1 Cable clamping devices, for attaching flexibleca

35、bles;7.4.3.2 Clamps for rigid tubing and sheaths in a range ofdiameters as listed in Specification E 608;7.4.3.3 Elastomeric boots to seal connector assembliesagainst moisture in service;7.4.3.4 Safety clamps or other devices to prevent inadvert-ent separation of connectors under conditions of sever

36、e vibra-tion; and7.4.3.5 Flat washers for use under wire attachment screwheads as an aid in the retention of the wires and preventdamage to the wires.7.4.4 Some suppliers may not offer all of the above itemswhile others may offer additional items. Supplier catalogs andliterature should be consulted

37、for details.8. Physical Properties8.1 The physical size of connectors conforming to thisspecification shall fall within the limits given in Table 1 for alldimensions indicated in that table. All other dimensions and alldetails of construction shall be determined by a manufacturersspecific design.9.

38、Test Methods9.1 Test Frequency:The following tests shall be conducted as either Qualificationor Production tests as follows:Paragraph Number Test Description Type9.2 Contact Resistance Qualification9.3 Thermal Gradient Qualification9.4 Insulation Resistance Qualification9.5 Engagement/Disengagement

39、Force Qualification9.6 Repeated Cycle Test Qualification9.7 Service Life Test QualificationTests listed as “Qualification” tests shall be initially performed by the manufac-turer to demonstrate conformance to this specification, and then periodically, asdetermined by the manufacturer, to verify that

40、 the connectors continue to meetthe requirements of this specification. Tests listed as “Production” tests shall beperformed on all connectors produced and sold to this specification.9.2 Contact Resistance Test:TABLE 3 SpecificationsCharacteristic Min Max Requirement Test ProcedureOperating Temperat

41、ure 0 F(18 C)300 F(150 C)7.1.2 9.6Engagement Force 6 lb(27 N)18 lb 7.2.4 9.5(80 N)Disengagement Force 6 lb(27 N)18 lb 7.2.4 9.5(80 N)Contact resistance (each leg) . 0.04 ohms 7.2.7 9.2Insulation resistance at RoomTemperature107ohms . 7.3.4 9.4Insulation Resistance at300 F (150 C)7.3.4 9.4Thermal Gra

42、dient . 62F 7.2.8 9.3(61.1 C)Repeated cycles (Engagement) 25 . 7.2.5 9.6E 1129/E 1129M 08139.2.1 With the contacts at ambient temperature, a directcurrent of 1.0 A from a constant current source shall be passedthrough one half (for example, the positive leg) of a matedconnector pair (See Fig. 2). Th

43、e voltage drop across that leg ofthe mated pair shall be measured and recorded. The procedureshall be repeated on the same leg of the mated connector pairbut with reversed polarity. The average of the two measuredvoltage drops shall be calculated to eliminate thermoelectricaleffects. The contact res

44、istance in ohms is then computed bydividing the average drop in volts by the current in amperes.9.2.2 The entire procedure of 9.2.1 is then repeated for theother half (negative leg) of the mated connector pair.9.2.3 The contact resistance value for each leg must bewithin the limit given in Table 3.9

45、.2.4 Alternate test methods may be used if agreeable toboth the supplier and the purchaser. In such event, the testmethod to be used shall be identified.9.3 Thermal Gradient Test:9.3.1 Apparatus:9.3.1.1 Heated Chamber, obtain or construct a chambermade of suitable heat resisting materials. Use Fig.

46、3 as ageneral guide for construction. A controlled heat source otherthan light bulbs may be used.9.3.1.2 Test Panel, fabricated and fitted similar to thatshown in Fig. 3. The small, removable, central panel throughwhich the plug and jack are mated should be made ofelectrically insulating, heat-resis

47、tant material not more thanabout 0.032 in. (0.8 mm) thick. This central panel should besomewhat larger than the outside dimensions of the connectorsto be tested. The panel is pierced with two clearance holesthrough which the connector prongs pass during the test. Athird hole is provided alongside th

48、e connector location throughwhich a single length of duplex thermocouple wire can pass.9.3.1.3 Measuring Instrument, a temperature indicating in-strument with capability of resolving thermocouple measure-ments to 0.1 C or better. A millivolt measuring instrumentwith the capability of resolving 1 mic

49、rovolt can also be used,but the results will need to be correlated to temperature9.3.2 Test Specimen Preparation:9.3.2.1 For uniformity of test results, use 24AWG (0.020 in.or 0.5 mm diameter) thermocouple wire or extension wire ofthe type corresponding to the connector to be tested. Largerdiameter wire will produce higher values of measured testdifference, while smaller diameter wire will produce lowervalues.9.3.2.2 Cut (in half) a continuous length of appropriateduplex thermocouple wire. Strip all cut ends. Form a singlejunction by welding four c