4. On completion of the melting phase the indicator light 2–“current protection” – lights up.
Start turning potentiometer P” anti-cloclwise by 0.5 to 1 grade of the scale per second,
decreasing the power.
5. Open the lid of the casting unit; the heating stops, the device goes into stand-by mode
and is ready for casting.
6. When the melting phase starts and the current protection (2) switches on again, repeat
the procedure explained under 4 above.
7. The procedure for setting the melting can be used for preheating the crucible.
5.2.6 Melting
Close the upper lid. The device goes into “melting” mode. The red indicator light “HF” on the
front panel is on, indicating that the high-frequency generator has switched on. The green
indicator light “1” is on, too, indicating that the required pressure in the cooling system has been
achieved. When the red indicator light “4” is on, it indicates that the “timer” is switched on.
If you lift the upper lid during the melting phase, the high-frequency generator immediately
switches off and the device goes into stand-by mode. In case you leave the upper lid closed, the
device remains in the “melting” mode for 150 s. After that indicator light “4” goes out and the
device is guided to the starting position, which is also indicated by an acoustic signal. This
protects the device from excessive operation in the “melting” mode. When the upper lid is lifted
again, the device goes into stand-by mode again.
If during the melting of the metal the “current protection” (“2” in Fig. 2) indicator light lights up,
the high-frequency generator switches off automatically and the melting is interrupted. To
resume the melting process you have to decrease the melting power by turning the P2
potentiometer by one grade, open the lid and close it back again (“2” in Fig. 3).
In the event that the “current protection” (“2”) indicator light lights up again, repeat the
mentioned procedure.
