电阻柜在使用前要进行检查,检查其性能好坏就是测量实际阻值与标称值是否相符,误差是否在允许范围之内.方法就是用万用表的电阻档进行测量.
Before use, the resistance cabinet should be inspected to check its performance, which involves measuring whether the actual resistance value matches the nominal value and whether the error is within the allowable range The method is to use the resistance range of a multimeter for measurement
电阻柜测量时要注意两点
When measuring a resistance cabinet, two points should be noted
1、要根据被测电阻值确定量程,使指针指示在刻度线的中间一段,这样便于观察.
1. The range should be determined based on the measured resistance value, so that the pointer indicates the middle section of the scale line for easy observation
2、确定电阻柜量程后,要进行调零,方法是两表笔短路（直接相碰）,调节“调零”电器使指针准确的指在Ω刻度线的“0”上,然后再测电阻的阻值.
2. After determining the range of the resistor cabinet, it is necessary to perform zero adjustment by short circuiting the two probes (directly touching each other), adjusting the "zero adjustment" device so that the pointer accurately points to the "0" on the Ω scale line, and then measuring the resistance value of the resistor
另外,还要注意人手不要碰电阻两端或接触表笔的金属部分.否则会引起测试误差.
Also, be careful not to touch the two ends of the resistor or the metal part of the probe with your hands Otherwise, it may cause testing errors
用万用表测出的电阻值接近标称值.就可以认为基本上质量是好的,如果相差太多或根本不通,就是坏的.
The resistance value measured with a multimeter is close to the nominal value It can be considered that the quality is basically good, but if there is too much difference or no connection at all, it is bad