What are the performance requirements for thermocouple

1 heating time

finned thermocouple under the test voltage, the element temperature from ambient temperature to test time should be no greater than 15 minutes.

2 rated power deviation

under the condition of sufficient heat, power rating of the deviation of components shall not exceed the scope of the following provisions;

element to the rated power is less than or equal to 100 w as: plus or minus 10%.

element to the rated power is greater than 100 w + 5% ~ - Larger value of 10%, or 10 w, take both.

3 leak current & lt; /DIV>

cold leak current after test and water pressure and seal leakage current shall not exceed 0. 5 ma,

under the working temperature of thermal state in the leakage current shall not exceed formula calculated value, but not more than 5 ma * big.

i = 1/6 ( tT×0。 00001).

I— Hot leak current mA

t - Fever mm length

T - Working temperature ℃

multiple components in series to the power supply, it should be a set of components as a whole for leakage current test.

4 insulation resistance

factory inspection when cold insulation resistance shall be not less than 50 m Ω.

after sealing test, after long-term storage or use of insulation resistance should be needless and M Ω.

under the working temperature of hot insulation resistance shall be not less than calculated value in the formula, but small * should not be less than 1 m Ω.

R=「（ 10 - 0. 015吨) / t”×0。 001

R— Hot insulation resistance M Ω

t - Fever mm length

T - Working temperature ℃

5 insulating compression strength

element should be keep under specified test conditions and test voltage for 1 min, and no flashover and breakdown phenomenon.

6 on the ability of power through the

element should be able to experience under the test conditions prescribed by the power test for 2000 times, without damage.

7 overload capacity

element under the specified test conditions and input power should be 30 times cycle under overload test, without damage.

8 heat resistance

element under the specified test conditions and test voltage shall be under a 1000 - cycle heat resistance test, without damage.