1、Designation: E1684 10Standard Specification forMiniature Thermocouple Connectors1This standard is issued under the fixed designation E1684; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in pare
2、ntheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers separable single-circuit minia-ture thermocouple connectors with two flat pins. Connectorscovered by this specification mus
3、t be rated for continuous useto at least 300F (150C), but they may optionally be ratedhigher.1.2 This specification does not cover multiple-circuit con-nectors, multi-pin connectors, standard size connectors, orconnectors intended primarily for panel mounting. High-temperature connectors (for exampl
4、e, those designed for con-tinuous use at temperatures significantly above approximately500F (260C) are not intended to be covered by thisspecification.1.3 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.4 The plug and
5、 jack may be ordered separately but manyof the connector characteristics (see Table 1) are qualified as amated pair. The requirements in this standard are applicable forthe connector pair supplied by the same manufacturer.1.5 The following precautionary statement pertains only tothe test methods por
6、tion, 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 and healthpractices and determine the applicability of regulatory limita-t
7、ions 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 referenceddocument, this specification shall take precedence.2.2 ASTM Standards:2E230 S
8、pecification and Temperature-Electromotive Force(EMF) Tables for Standardized ThermocouplesE344 Terminology Relating to Thermometry and Hydrom-etry3. Terminology3.1 DefinitionsThe definitions given in TerminologyE344 shall apply.3.2 Definitions of Terms Specific to This Standard:3.2.1 connector pair
9、, nassembly consisting of a plug anda jack, each having both positive and negative inserts, that willconnect two parts of an electrical circuit and provide a meansof physically disconnecting the two parts without the use oftools.3.2.2 contact insert, nmetallic conductor assemblies that,when installe
10、d in connector bodies, provide connections be-tween two parts of an electrical circuit. Plug connectors willcontain projecting prong contacts, 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 an
11、d retain all physical andthermoelectric properties.3.2.4 test difference, napparent thermoelectric differenceattributable to mated connectors observed by the test procedureof this specification.4. Significance and Use4.1 The widespread use of thermocouple connectors re-quires standardization of mati
12、ng dimensions and performancecharacteristics.4.2 This specification describes miniaturized thermocoupleconnector dimensions and capabilities and includes test proce-dures suitable for evaluating the performance of a particularspecimen or design. The tests described are not intended for1This specific
13、ation is under the jurisdiction of ASTM Committee E20 onTemperature Measurement and is the direct responsibility of Subcommittee E20.04on Thermocouples.Current edition approved Nov. 1, 2010. Published December 2010. Originallyapproved in 1995. Last previous edition approved in 2005 as E1684 05. DOI:
14、10.1520/E1684-10.2For 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.TABLE 1 RatingsCharacteristic min maxOperati
15、ng temperature 0F (-18C) 300F (150C)Contact resistance (each leg) . 0.04 VInsulation resistance at room temperature 107V .Insulation resistance at 300 F (150 C) 106V .Test difference . 62F (61.1C)Repeated coupling cycles (coupled oruncoupled)25 .Service life 5000 h .Withdraw force 8 oz .1Copyright A
16、STM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.routine inspection or rapid testing of large groups of connectorsor for quality control purposes.5. Classification5.1 Plugs or Jacks:5.1.1 Connectors shall be constructed as either plugs orjacks, a
17、nd these two forms shall be designed to connect witheach other.5.1.2 Plug connectors shall have two external prong con-tacts of differing sizes to prevent improper mating. Thenegative prong shall be the wider, as indicated in Table 2 andFig. 1.5.1.3 Jack connector shall have two internal socket cont
18、actssized and spaced to receive and accommodate the prongcontacts of the mating plug. Jack connectors shall also includea means of producing and maintaining sufficient contactpressure to meet all the other requirements of this specification.5.2 ANSI/ASTM Type:5.2.1 Connectors shall be produced in ve
19、rsions to matcheach of the standardized ANSI/ASTM thermocouple types asgiven in Table 3.5.2.2 The insert materials of each plug and jack shall havethermoelectric properties conforming to the characteristics ofthe corresponding thermocouple type as given in SpecificationE230 over the temperature rang
20、e specified in Table 1.5.2.3 Calibration conformance and gradient testing is notapplicable to Type B thermoelectrically neutral (Cu/Cu) con-nectors.6. Ordering Information6.1 Orders for connectors under this specification shallinclude the following:6.1.1 Quantity of plugs or jacks (specify which);6.
21、1.2 ANSI/ASTM calibration thermocouple type and colorcode per Table 3. Connectors shall be supplied to the ASTMcolor code unless otherwise specified;6.1.3 Any optional accessories that may be required, such asthose listed in 7.4.3;6.1.4 Special testing requirements; and6.1.5 Requirements for certifi
22、cates 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 2.7.1.2 The connector body shall be made of an insulatingmaterial capable of contin
23、uous use at any temperature between0F (-18C) and 300F (150C) for the service life given inTable 1, without losing its ability to conform to this specifica-tion.7.1.3 The connector bodies shall be colored in accordancewith the color code given in Table 3 to provide rapid andpermanent identification o
24、f the thermocouple calibration withwhich it is designed to be used. Each plug and jack shall bepermanently marked with a symbol or symbols to identifypositive and negative conductor inserts. All connectors shallbear the suppliers name or other means of source identifica-tion, unless otherwise specif
25、ied 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 shall be fabricated of paired materialsof the same thermocouple type as the thermocouple with wh
26、ichthey are to be used.7.2.2 The inside width and depth of the jack connector shallbe such as to receive the corresponding plug prong smoothlyand easily when inserted.TABLE 2 DimensionsDimension SymbolAMinimum Size,in. (mm)Maximum Size,in. (mm)Plug body length PL . 0.788 (20.00)Jack body length JL .
27、 1.069 (27.13)Body width W . 0.635 (16.10)Body thickness T . 0.385 (9.78)Length of prong P 0.406 (10.31) 0.515 (13.10)Depth of socket J 0.515 (13.10) .Prong spacing X 0.307 (7.80) 0.317 (8.05)Positive pin width W1 0.090 (2.28) 0.098 (2.49)Negative pin width W2 0.121 (3.07) 0.129 (3.27)Pin thickness
28、T1 0.030 (0.73) 0.034 (0.86)ASymbol reference corresponds to Fig. 1.FIG. 1 Miniature Thermocouple Connector Dimensions(see Table 2)TABLE 3 IdentificationANSI/ASTMTypeABody Color CodingT blueJ blackE purpleK yellowN orangeR or S greenB (Cu/Cu)AwhiteCredAThermoelectrically neutral (Cu/Cu) connectors a
29、re customarily used with TypeB thermocouples.E1684 1027.2.3 The force required for complete disengagement shallconform to the requirements of Table 1.7.3 Construction and Assembly:7.3.1 Wire attachment shall be by means of a screw orclamp suitable for use with wire diameters from 30 AWG (0.01in. or
30、0.25 mm in diameter) to 20 AWG (0.032 in. or 0.8 mmin diameter).7.3.2 Contact 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.7.4
31、Optional Accessories:7.4.1 Connector accessories are 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.
32、1 Cable clamping devices for attaching flexible cables;7.4.3.2 Clamps for rigid tubing and sheaths in a range ofdiameters whose conductor sizes are within the range specifiedin 7.3.1;7.4.3.3 Elastomeric boots to seal connector assembliesagainst moisture in service;7.4.3.4 Safety clamps or other devi
33、ces to prevent inadvert-ent separation of connectors under conditions of severe vibra-tion; and7.4.3.5 Flat washers for use under wire attachment screwheads as an aid in the retention of the wires.7.4.4 Some suppliers may not offer all the above items,while others may offer additional items. Supplie
34、r catalogs andliterature should be consulted for details.8. Physical Properties8.1 The physical size of connectors conforming to thisspecification shall fall within the limits given in Table 2 for alldimensions indicated in that table. All other dimensions and alldetails of construction shall be det
35、ermined by a manufacturersspecific design.9. Test Methods9.1 Test Frequency:9.1.1 The following tests shall be conducted as eitherQualification or Production tests in Table 4.9.1.2 Tests listed as “Qualification” tests shall be initiallyperformed by the manufacturer to demonstrate conformance tothis
36、 specification, and then periodically, as determined by themanufacturer, to verify that the connectors continue to meet therequirements of this specification.9.2 Contact Resistance Test:9.2.1 A direct current of 1.0 A from a constant currentsource shall be passed through one half (for example, thepo
37、sitive leg) of a mated connector pair (see Fig. 2). The voltagedrop across that leg of the mated pair shall be measured andrecorded. The procedure shall be repeated on the same leg ofthe mated connector pair but with reversed polarity. Theaverage of the two measured voltage drops shall be calculated
38、to eliminate thermoelectrical effects. The contact resistance inohms is then computed by dividing the average drop in volts bythe 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 fo
39、r each leg must bewithin the limit given in Table 1.9.2.4 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 ChamberObtain or construct a chamberm
40、ade of suitable heat-resisting materials. Use Fig. 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 sh
41、ould be made ofelectrically insulating, heat-resistant material not more than132-in. (0.8-mm) thick. This central panel should be somewhatlarger than the outside dimensions of the connectors to betested. The panel is pierced with two clearance holes throughwhich the connector prongs pass during the
42、test. A third hole isprovided alongside the connector location through which asingle length of duplex thermocouple wire can pass.9.3.2 Test Specimen Preparation:9.3.2.1 For uniformity of test results, use 24 AWG (0.020-in. or 0.5-mm diameter) thermocouple wire or extension wireof the type correspond
43、ing 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 fo
44、ur conductors at one end into a commonbead. Cut one of the two wire lengths at a distance of 4 to 6 in.(10 to 15 cm) from the junction bead. Strip these newly cutends, and connect the jack connector being tested to the shortwire length extending from the weld bead. Then connect theseparate segment o
45、f wire to the plug connector being tested, asshown in Fig. 4.9.3.2.3 Assemble the connectors in the removable test panelby pushing the plug prongs through two holes in the test paneland mating the jack to it as shown in Fig. 3. Pass the uncutlength of wire from the junction bead through the third ho
46、le inthe test panel.9.3.3 Test Procedure:TABLE 4 Qualification TestsParagraph Number Test Description Type9.2 Contact Resistance Qualification9.3 Thermal Gradient Qualification9.4 Insulation Resistance Qualification9.5 Disengagement Force Qualification9.6 Repeated Cycle Test Qualification9.7 Service
47、 Life Test QualificationE1684 1039.3.3.1 Install the test panel containing the previously wiredconnectors in an opening in the test chamber so that thejunction bead and jack connector are inside the heated chamberas shown in Fig. 3. Stabilize the test chamber at 150 6 10F(65 6 5C) and allow the syst
48、em to come to thermal equilib-rium.9.3.3.2 Connect an instrument, capable of resolving 0.2F(0.1C) or less, to the wire pair passing through the hole in thetest panel, and measure and record the chamber temperature.Reconnect the instrument to the wire pair extending from theconnector plug under test.
49、 Measure and record the new reading.The difference between the first reading, taken directly, and thesecond, taken through the connector pair under test, is the testdifference.9.3.3.3 The test difference expresses quantitatively the ef-fect of the connector pairs presence in the circuit under the testconditions. The test difference shall not be greater than thevalue given in Table 1 for qualification under this specification.9.4 Insulation Resistance Test:9.4.1 Insulation resistance between legs shall be measuredwith a megohm meter using a voltage b
