电热油汀取暖器加热管有正负极吗? 电热油汀不加热，是什么原因
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测量油汀的好坏，用万用表测量阻值就可以了，如果测量工作电流，用钳型表即可。
电热油汀取暖器加热管没有正负极，用的交流电，分火线与零线。
使用交流电源的家用电器，没有正负极之分
你在哪个位置检测的？怎么检测的？
要测量电流，需要把电源线中的零线、火线分开，只检测一根。（钳形表测试电流也是这样）
一般交流电供电的设备，特别是电阻丝、加热灯管等都没有极性。在电源插头附近找一条线测量试试。 电流测量电路连接有问题。
加热管是交流的没有正负极，电流指示为0可能是加热管坏了
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绛旓細浜屻鐢电儹娌规眬璐鐢靛悧 鍙互鏄庣‘鍛婅瘔澶у鐢电儹娌规眬鈥滅湅璧锋潵鈥濇槸寰堣垂鐢点傜數鐑补姹鏄埄鐢ㄧ數鍔犵儹绠灏嗗叾鍐呴儴鐨勬补鍔犵儹鍚庣敱鍏舵暎鐑櫒娌归氳矾瀵规祦鑰屽悜澶栫晫鏁ｇ儹锛屽畠鏄睘浜庡ぇ闈㈢Н鍔犳俯绫诲瀷鐨鍙栨殩鍣锛岀壒鐐规槸鑳藉ぇ闈㈢Н鍔犵儹绌洪棿娓╁害锛岃屼笖鍙互鑷姩琛℃俯锛屾棤浠讳綍鍙鍏;缂虹偣鏄姞鐑殑閫熷害鎱紝鑰楃數閲忓ぇ锛岄渶瑕佸彇鏆栨椂瑕侀鍏堝紑鏈恒傚畠...
