Before the electric heater equipment starts to be shipped, it is necessary to check whether the product has air leakage, and whether the grounding line device is safe and reliable. Make sure that the work is done without errors before you can turn on the device to work.
The electric heating tube of the electric heater should be inspected for insulation. Its insulation resistance to ground should be less than 1 ohm. If it is greater than 1 ohm, it can not be used. It must be ensured that it meets the standard requirements before it can continue to work.