1,  Product Instruction 
    
The test chain is designed according to the standard requirements of IEC 60598 and GB 7000.1standard 4.26 item. It is mainly used for testing the accidental short-circuit protection of uninsulated lights, accessible and opposite SELV parts.

The test chain is made of pinchbeck alloy(Cu63Zn37), plating surface treatment and coating ,200g/m ,the range of resistance value is between 2.5±20%Ωwhen loading stretch.


2,  Method of Application
●When measuring the test chain resistance value, please ensure the range is between 2.5±20%Ω
●The space distance between the two poles of the SELV tester ,should be remarked as X, unit is (centimeter/cm)
●The hanging standard balance weight at two sides of test chain =15*X*g or the Max.250 balance weight.
●To set the thermocouple on the suitable position of tested sample, switch on temperature inspection instrument
●Accessing the sample 0.9-1.1times rated voltage power supply
●Place the test chain ,to test short-circle

Note : Melted test chain may scald yourself.

3, Note:
■The test chain is made of pinchbeck alloy, and the surface without coating which is easy to be oxidized, pay attention to maintenance.
■When the resistance value occurs fluctuation, it can be cleaned by ultrasonic or soaked by 0.5% weak acid.
■The overweight of balance weight will cause the wire diameter become smaller.

SHENZHEN BONAD INSTRUMENT CO.,LTD, is a high-tech company in China, BONAD quality system has been strictly certified by ISO9001:2015. As a CIE Membership.

Our main products are Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, accessibility test probe and test finger, Glow Wire Test and Needle Flame Test,freezing load test package, soil moisture sensor, all kinds of gauges and so on.
BONAD have gathered lots of experienced researchers and administrators on this field. BONAD products are manufactured strictly in accordance with various EN, IEC, CE, UL, VDE, VS, JIS, ISO, CEE, BS, FMV, GB and other similar international standards. All products can pass CE certificate and authenticated by the third party lab.

Please feel free to contact us if you need any support.
sales Dep:Alice@szbonad.com,
Cell/WhatsApp:+8613380391156