UL859 Hair dryer temperature test system | UL859-figure 44.4 spacings on thermocouple grid

The thermocouple grid assembly is to consist of two pieces of 1/16-inch (1.6-mm) thick glass epoxy board of the configuration and dimensions shown in Figure 44.4. The two boards are to be separated 1/8-inch (3.2-mm) by one 5-1/4- by 1/4- by 1/8-inch (133- by 6.4- by 3.2-mm) wood spacer at the top and bottom edges. Each spacer is to be secured by four 4 -40 by 3/8-inch countersunk flat head machine screws. Each end screw is to be threaded from the face of the assembly into a nut against the rear epoxy board. Each of the middle screws is to be located approximately 1-1/2 inches (38.1 mm) from the nearest longer edge of the board and threaded from the face into a standoff leg of a sheet aluminum back plate. The 5-1/2 by 3-1/4 inch (140 by 83 mm) stand-off back plate is to consist of sheet aluminum hat is 0.05 inch (1.3 mm) thick, having a minimum 7/16-inch (11.1-mm) wide integral standoff leg formed at each corner by means of an extension of the metal being bent in two successive 90-degree angles to cause the back plate to stand away from the rear epoxy board a distance of 1/4 inch. The back plate is to be secured to the center 5-1/2 by 3-1/4 inch section of the board. The board assembly is to be provided with 53 thermocouples rated 30 AWG (0.05 mm2). The thermocouples are to be located on the grid spaced as shown in Figure 44.4. The thermocouples are to be passed through the two thicknesses of glass epoxy board, and the thermocouple junction is to be cemented to the face of the board using epoxy cement, as shown in Figure 44.5.

Kingpo Technology Development Limited is a pioneer and leader of global safety testing equipment manufacturer.We offer one-stop service for worldwide labs from R&D,testing,production to after-sales service.We dedicate ourselves in achieving optimal production quality for our customers,reduce cost and enhance enterprise’s international competitiveness.

Kingpo is accredited by International Electrotechnical Commission(IEC) and becomes a nominated supplier and is officially issued a CBTL certificate.We are now among the world’s leading laboratory testing equipment manufacturer to produce the highest level and more standard testing equipment for global Electrotechnics labs becoming nominated supplier of NEMKO,UL,PHILIPS,CTK,CVC(Vkan Certification & Testing Co.,Ltd),Dongguan Quality Testing,China Household Electric Appliance Research Institute,Russia National Standard Institute,Belarus National Standard Institute,Korea National Standard Institute,etc.Lamp cap gauges and testing equipments produced by Kingpo,which are calibrated by CNAS and ilac-MRA ,have a high international reputation.

Kingpo aims at manufacturing world class testing equipment for Chinese labs,establishing an independent R&D center and introducing foreign state-of-the-art technology and international high-tech talents.Adopting a creative design concept,taking sensor data acquisition as forerunner,computer control technology as lead,imported transmission device with high accuracy and low noises,we have developed more than one hundred and sixty products.

Lab software Lims system　

Material combustibility testing equipment　

ELectric tool testing equipment

Plug and socket testing equipment

Switch service life testing equipment　　　

Electrical accessories testing equipment

Luminaire testing equipment　　

Household appliances testing equipment　　　

Anti water spray testing equipment

Wire and cable testing equipment

IT product testing equipment　　　　

Battery testing equipment

Kingpo’s domestic customers include Entry-Exit Inspection and Quarantine Bureau, Bureau of Technical Supervision,Product Quality Supervision and Inspection Institute,UL Lab(Underwriter Laboratories),TUV Rheinland,SGS and other electronic manufacturer.Our products are exported to international market and have also established distributorships in HK,Vietnam,Singapore,Thailand,Iran,India,

Africa,New Zealand,Australia ,Germany and so on.

Service is an essential factor to improve enterprise’s competitiveness.Therefore,Kingpo has always made every effort in improve service level and service value.Before sale,we have professional engineering team to provide customers with comprehensive consultant and customized service.After sale,we have after-sale team to offer customer timely and satisfying technical support and product maintenance.

By means of excellent product competitiveness and complete service,our company has won numerous customers high praise and sincere trust.In complying with technical improvement and increased efficiency and quality assurance of these products ,we insist on providing high end products to market and dedicating to being a leader in testing equipment industry.