IEC 63203-201-3 pdf – Wearable electronic devices and technologies – Part 201-3: Electronic textile – Determination of electrical resistance of conductive textiles under simulated microclimate
This part of lEC 63203-201 specifies a test method for determination of the electrical resistance
of conductive fabrics under simulated microclimate within clothing. The microclimate is theclimate of the small air layer between the skin and clothing having a specific temperature and
humidity.This test method can be applied to conductive fabrics including multilayer assembliesfor use in clothing.
Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.
For undated’ references,the latestedition of the referenced document(including anyamendments) applies.
ISO 139,Textiles – Standard atmospheres for conditioning and testing
ISO 11092:2014,Textiles – Physiological effects – Measurement of thermal and water-vapourresistance under steady-state conditions (sweating guarded-hotplate test)
ISO 21232:2018,—Textiles – Determinationof moisturizingeffect of textile materials bymeasurement of microclimate between textiles and simulated human skin using sweatingguarded hotplate
EN 16812:2016,Textiles and textile products – Electrically conductive textiles – Determinationof the linear electrical resistance of conductive tracks
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.
IS0 and lEC maintain terminological databases for use in standardization at the followingaddresses:
·IEC Electropedia: available at http://www.electropedia.orgl
-ISo Online browsing platform: available at http://www.iso.orglobp3.1
textile-based electrically conductive track
electrically conductive part of the textile having a length (L) to width (W) ratio of minimum 10 to1
[SOURCE:EN 16812:2016,3.1, modified – Note 1 to entry has been deleted.]
3.2
linear electrical resistanceRL
electricall resistance per unit length of a track
Note 1 to entry: Linear eloctricaresistance is axpressed in ohm par metre.
[SOURCE: EN 16812:2016,3.3, modified – Note 1 to entry has been added.]
3.3
microclimate
climate of the small air layer (between the skin and the clothing or between textiles and sweatingguarded-hotplate)
Nate 1 to entry. This mieroclimate has specific temperature and humidity characteristics. Simulated microclimate isthe climate of the air layer between fabric and sweating guarded-hatplate.
[SOURCE: ISO 21232;2018,3.2,modified -A hyphen has been added to the term “sweatingguarded hotplate” and the second sentence in the note has been added.]
3.4
water-vapour resistance including air layerRet_al
water-vapour pressure difference between the two faces of a material(separated from eachother by 5 mm) divided by the resultantevaporative heat flux per unit area in the direction ofthe gradient
Note 1 to entry:Water-vapour resistance is measured under the simulated state in which the air layer existsbetween the skin and clothing.
Note 2 to entry:. Water-vapour resistance including air layer is expressed in square metres pascal per watt.[SOURCE: ISO 21232:2018,3.3]
4Principle of test
Clothing comfort depends on the environmental conditions (humidity，temperature) of themicroclimate between the skin and the fabrics when clothing is womn.The e-textle system made
of conductive fabrics is in direct contact with human skin so that the electrical resistance ofconductive fabrics is affected by the microclimate between human skin and fabric. Therefore,this test method can perform the combined measurement of electrical resistance using themeasurement principle of the four-wire Kelvin method and a DC current source,under asimulated microclimate.
5Test equipment
5.1 Sweating guarded-hotplate
For the test device, the sweating guarded-hotplate (see Figure 1), specified in lSO 11092:2014,is used.The upper part is a measuring unit with temperature and water supply control and thelower part is a thermal guard with temperature control.
5.2Device including temperature and humidity sensor with set-up of the fourelectrode – four wire method
5.2.1 The device shall be made of electrically non-conductive material. The device is usedto create space for the air layer between hotplate and specimen.The sensor inside the devicemeasures the microclimate between hotplate and specimen, specified in ISO 21232:2018 (seeFigure 2).