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TQ2SA-4.5V
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TQ2SA-9V
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TQ2SA-L-1.5V
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TQ2SA-L-12V
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TQ2SA-L2-1.5V
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TQ2SL-L2-4.5V
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TQ2SS-L-1.5V
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TQ2SS-L-12V
TQ2SS-L-12V-X
TQ2SS-L-12V-Z
TQ2SS-L2-1.5V
TQ2SS-L2-1.5V-X
TQ2SS-L2-1.5V-Z
TQ2SS-L2-12V
TQ2SS-L2-12V-X
TQ2SS-L2-12V-Z
TQ2SS-L2-24V
TQ2SS-L2-24V-X
TQ2SS-L2-24V-Z
TQ2SS-L2-3V
TQ2SS-L2-3V-X
TQ2SS-L2-3V-Z
TQ2SS-L2-4.5V
TQ2SS-L2-4.5V-X
TQ2SS-L2-4.5V-Z
TQ2SS-L-24V
TQ2SS-L-24V-X
TQ2SS-L-24V-Z
TQ2SS-L2-5V
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TQ2SS-L2-5V-Z
TQ2SS-L2-6V
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TQ2SS-L2-6V-Z
TQ2SS-L2-9V
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TQ2SS-L2-9V-Z
TQ2SS-L-3V
TQ2SS-L-3V-X
TQ2SS-L-3V-Z
TQ2SS-L-4.5V
TQ2SS-L-4.5V-X
TQ2SS-L-4.5V-Z
TQ2SS-L-5V
TQ2SS-L-5V-X
TQ2SS-L-5V-Z
在并联电路中，支路电流的大小与支路电阻的大小成反比。改变Ip和IR两支路阻值的大小，即可改变电流分配比例，实现量程的转换。如下图所示。当被测电流I1从A端输入时，IP支路电阻为R0，IR支路电阻为R1＋R2＋R3。而当被测电流I3从A的3端输入时，Ip支路的电阻为R2＋R1＋R0，IR之路的电阻为R3。可见，当表头指示相同（IP相同）时，I3I1，扩大了量程。读数方法电流表指示的读书方法是：满刻度值（刻度线右边）等于所选量程档位数，根据表针指示位置折算出测量结果。