Bimetallic thermometer national standard requirements

Thermometer, many different kinds of technical requirements are also a lot of attention to, because a thermometer should meet the national standards of production technology standard, the following said the country and the industry of bimetallic thermometer on the production of technical requirements: 1. Should be marked on the thermometer dial factory name ( Or factory standard) , model, factory number, international temperature scale c symbol & other; ℃” , accuracy grades, make the symbol and serial number and calendar year, as well as measuring instruments manufacturing license. Electric contact thermometer should also be designated on the shell on the dial or contact rated power, contact the highest operating voltage ( Ac or dc) , the largest engineering current, a sign of earthing terminal. 2. Bimetallic thermometer pointer should cover ( Into) A quarter - the shortest dividing line 3/4, pointer indicating the width should not be more than the shortest dividing line width. 3. In the environmental temperature for 15 35 ' C, town under the condition of 85% relative humidity, the output terminal of electric contact thermometer and earthing terminal ( Or shell) And between the output terminals of the insulation resistance between should not less than the specified value of countries. 4. 。 Bimetallic thermometer components assembly wants firm, shall not be loose, can not have corrosion, cases should be strong, uniform and smooth. 5. Bimetallic thermometer used in the header should be transparent glass or other transparent material, shall not interfere with the correct reading defect or damage. 6. Bimetallic thermometer scribed line on the dial, Numbers, and other marks shall be complete, clear and correct. 7. Bimetallic thermometer pointer and dial the distance between the plane should be not more than 5 mm, but should not touch the dial for adjustable Angle of bimetallic thermometer should be in the inspection from the axial ( Or radial) Position to the radial ( Or axial) The whole process of the position. The above is the production process requirement of the bimetallic thermometer, if want to production, need to pay attention to these problems.