Turn on and cut function details: The table shows the turn on and cut situations as pointer moves deasil, and the function is opposite while the pointer moves widdershins.

表中开关功能是表示：仪表压位于小刻度值时所具有开关功能，即压从小刻度值开始顺时动时开关状态，当压逆时转动时，实现开关功能相反。