ADV169-P00 Yokogawa 离散量输入模块 

ADV169-P00 Yokogawa 离散量输入模块 

数字万用表的欧姆档的主要用途是：测电机绕组电阻、测导线是否断线、测插头通断等等。数字1表示：测量的阻值大于万用表表盘设置的阻值（比如测一个1K的电阻，而你将表盘拨到200Ω一档，读数就会显示1）无穷大（横8字）就是绝缘体的阻值。

    如果用电阻测插头通断，那显示什么呢。还有：我有一三厢电机。看他们多是用电阻测二根导线。然后再测二根。那显示值怎么看？

    那要看你插头是起什么作用的，如果是拖线板，那就测量插孔与对应插片的通断，正常显示0-1Ω左右，不通显示1。如果是风扇之类的电器插头，那也只能测量插头与电器内的接线头通断，显示同上。三相电机用电阻测二根导线，那是其实是测量电机绕组的阻值，判断电机绕组是否短路或断路及确认三相绕组阻值是否平衡，短路分匝间短路和导线短路，前者显示阻值但与其它两相阻值不等，后者0-1Ω左右。绕组断路测量显示为1。三相绕组不平衡就是测量的三相绕组阻值不相等（正常情况误差很小）。电机绕组阻值与电机的功率大小有关，功率越大阻值越小，功率越小阻值越大。

ADV169-P00 Yokogawa 离散量输入模块 

The main uses of the ohm file of the digital multimeter are: to measure the resistance of the motor winding, to measure whether the wire is broken, to measure the plug is broken, and so on. The number 1 means that the resistance value measured is greater than the resistance value set by the multimeter dial (for example, to measure a 1K resistance, and you move the dial to 200Ω, the reading will show 1) infinity (horizontal 8) is the resistance value of the insulator.

What does it say if you test the plug with a resistor. Also: I have a three-box motor. Look, they're mostly using resistance to measure two wires. And then test two more. What about the display value?

It depends on what role your plug plays, if it is a drag wire board, then measure the jack and the corresponding plug, the normal display is about 0-1Ω, the blocked display is 1. If it is an electrical plug such as a fan, it can only measure the plug and the connector in the electrical device, and the display is the same as above. The three-phase motor uses resistance to measure two wires, which is actually to measure the resistance value of the motor winding, determine whether the motor winding is short circuit or open circuit and confirm whether the three-phase winding resistance value is balanced, short circuit between turns short circuit and wire short circuit, the former shows the resistance value but the resistance value is different from the other two phases, the latter is about 0-1Ω. The winding break measurement is shown as 1. Three-phase winding unbalance is the measurement of three-phase winding resistance values are not equal (normal error is very small). The resistance value of the motor winding is related to the power of the motor, the larger the power, the smaller the resistance value, and the smaller the power, the larger the resistance value.