1. Zimapangidwa ndi pepala la aluminiyamu lapamwamba kwambiri losindikizidwa, lomwe ndi lamphamvu komanso lolimba;
2. The pepala zitsulo anamaliza ndi electrostatic ufa kupopera njira, amene ndi wokongola ndi yosavuta kuyeretsa;
3. Mapangidwe olemetsa amawongolera kukhazikika;
4. Kuwongolera kwa PLC, ntchito yodalirika komanso yokhazikika;