The hair dryer's temperature test device is designed as per UL859 Clause 37.5, it consists of 53 thermocouple grids and test frames.
Test point:53 point
Thermocouple length: about 1.5m, T type or K type T;
Test frame position adjustable
Temperature meter not included
The thermocouple grid assembly is to consist of two pieces of 1/16-inch (1.6-mm) thick glassepoxy board of the configuration and dimensions shown in Figure 37.4. The two boards are to beseparated 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 atthe top and bottom edges. Each spacer is to be secured by four 4 – 40 by 3/8-inch countersunk at headmachine screws. Each end screw is to be threaded from the face of the assembly into a nut against therear epoxy board. Each of the middle screws is to be located approximately 1-1/2 inches (38.1 mm) fromthe nearest longer edge of the board and threaded from the face into a standoff leg of a sheet aluminumback plate. The 5-1/2 by 3-1/4 inch (140 by 83 mm) stand-off back plate is to consist of sheet aluminumthat is 0.05 inch (1.3 mm) thick, having a minimum 7/16-inch (11.1-mm) wide integral standoff leg formedat each corner by means of an extension of the metal being bent in two successive 90-degree angles tocause the back plate to stand away from the rear epoxy board a distance of 1/4 inch. The back plate isto be secured to the center 5-1/2 by 3-1/4 inch section of the board. The board assembly is to be providedwith 53 thermocouples rated 30 AWG (0.05 mm 2 ). The thermocouples are to be located on the gridspaced as shown in Figure 37.4. The thermocouples are to be passed through the two thicknesses ofglass epoxy board, and the thermocouple junction is to be cemented to the face of the board using epoxycement, as shown in Figure 37.5.
