What tests do ceramic heating elements have to do before they leave the factory?

What tests do ceramic heating elements have to do before they leave the factory?
1) Power-on test
2) Insulation resistance detection
3) Leakage Current Test
4) High-voltage insulation test
5) Peel force test
6) Temperature rise measurement
7) Life test
8) measurement
9) Appearance & Dimension test
10) Packing inspection
11) Other Special Requirements from customer

Here is some of our ceramic rod heater test video.
Video content:
1. Conventional power-on test
2. Power on test
3. Composite ceramics, lead does not fall off at 800℃ P1837
4. Life test
5. Temperature test (Temperature behavior at different voltages)
6. Real-time data measured by infrared thermometer
7. Infrared thermometer (range of 900 degrees), HHHH means out of range, over top 900℃
8. Power on the test, non-routine test
9. Power measurement, Innovacera hot surface igniter for Biomass Pellet Stove