The performance of the single head thermocouple conditions

1 heating time

single head thermocouple under the test voltage, the component temperature from ambient temperature to test time should be no greater than 15 min

2 rated power deviation

under the condition of fully fever, rated power of the extent of the deviation should be no more than 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 * no more than 5 ma

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 cold insulation resistance shall be not less than 50 M Ω

after sealing test, after long-term storage or use of the 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 to the

7 overload capacity

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

8 heat resistance

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

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