1, element allowed under the following conditions:
A. air relative humidity of not more than 95%, non explosive and corrosive gases. (explosion-proof heater except)
B. working voltage should be not greater than 1.1 times the rated value, the shell should be effectively grounded.
C. insulation resistance than 1M Ω dielectric strength: 2KV/1min
2, the electrothermal pipe should be fixed, effective heating zone must be fully immersed in a liquid or solid metal, no air burning. Found the body surface scaling or carbon, should be cleaned and then, to avoid affecting heat and shorten the service life.
3, heating the fusible metal or solid salt, alkali, asphalt, paraffin, should reduce the use of voltage for medium, after melting, can rise to the rated voltage.
4, heating the air element shall be uniformly arranged so that the element cross, has good heat dissipation conditions, so that the air can be fully heated.
5, heating nitrate should consider security measures, prevention of explosion accident.
6, part of the wiring should be placed on the outside of the insulation layer, avoid contact with corrosive, explosive medium, moisture; wiring should be able to bear long-term connection portion of the temperature and heating load, a wiring screw fastening should avoid excessive force.
7, components should be stored in a dry place, if the long-term placement of insulation resistance of less than 1M ohm, can be in the oven at 200 ℃ drying, or lower voltage electric heating, until the return of insulation resistance.
8, electric heating pipe outlet of magnesium oxide powder, used in place to avoid contamination and the ingress of moisture, prevent the occurrence of leakage accident.
9, non staff please hasty operation.