设置模拟量一些参数的：
DIP开关设置
EM235
单极性 满量程输入 分辨率
SW1
SW2
SW3
SW4
SW5
SW6

ON OFF OFF ON OFF ON 0 - 50 mV 12.5μV
OFF ON OFF ON OFF ON 0 - 100 mV 25μV
ON OFF OFF OFF ON ON 0 - 500 mV 125μV
OFF ON OFF OFF ON ON 0 - 1 V 250μV
ON OFF OFF OFF OFF ON 0 - 5 V 1.25mV
0 - 20 mA 5μA
OFF ON OFF OFF OFF ON 0 - 10 V 2.5mV
双极性 满量程输入 分辨率
SW1 SW2 SW3 SW4 SW5 SW6
ON OFF OFF ON OFF OFF ±25 mV 12.5μV
OFF ON OFF ON OFF OFF ±50 mV 25μV
OFF OFF ON ON OFF OFF ±100 mV 50μV
ON OFF OFF OFF ON OFF ±250 mV 125μV
OFF ON OFF OFF ON OFF ±500 mV 250μV
OFF OFF ON OFF ON OFF ±1 V 500μV
ON OFF OFF OFF OFF OFF ±2.5 V 1.25mV
OFF ON OFF OFF OFF OFF ±5 V 2.5 mV
OFF OFF ON OFF OFF OFF ±10 V 5 mV