How to check the water cooling system of induction melting furnace?

After the water circuit of the induction melting furnace is connected, use a 0.4Mpa water pressure test for 10 minutes to check for water leakage. After qualified, adjust the electric contact pressure gauge to the range of 0.15～0.25Mpa. Adjust the signal thermometer to 55°C. Check whether the current branch is normal.