Tester pen multimeter for measuring circuit faults
Lighting circuit faults in the reality of work from time to time, and hidden faults are invisible to the eye, the following to introduce you to the power test pen, multimeter to measure circuit faults.
1, with a power test pen to measure the circuit in the phase line, zero line voltage is normal, phase line neon tube is bright, zero line is not bright is normal. Description of the fault in the indoor circuit and part of the electrical equipment. Should be carried out separately one by one, check whether the socket, bulb, refrigerator, air conditioning, water heater, etc. is normal.
2, phase line, zero line measured with a tester are bright. This means that the fault appears in the circuit of the zero line. Should find the zero line break point, zero line connector is poor contact and the exact location of the break point.
3, the phase line, the zero line with a tester pen measurements are not bright. It means that the fault occurs in the circuit of the phase line. Should look for phase line breaks and poor contact joints.
4, the knife gate in the closed position, the fuse blown. It means that the phase line is short-circuited with the zero line, and the short-circuit point and the burnt part of the appliance should be found.
5, the phase line with a detector pen to measure the brightness of the neon tube darker than normal, the zero line is normal. Description of the fault appears in the phase line, caused by causes such as wire insulation is reduced, wire skin broken ocarina leakage, resulting in voltage drop, household appliances can not run normally.
6, with a power test pen to measure the phase line, zero line are not bright, first view the circuit of the switch, knife gate, fuse is normal, see whether the input position.
7, if the indoor dark line, dark line broken, can not be replaced, and can not break the wall to check the line, should be in the indoor nearest power point, with open wire connection, so that the power supply from the socket back to the circuit, to find out the fault situation, to narrow the scope of the fault.
8, copper and aluminium wire mixing is strictly prohibited, long time contact oxidation, wire breakage, endangering the personal safety of pedestrians.
9, lighting switch or leakage protector can not close the gate, first of all, the load line will be removed, empty test switch or leakage protector, if normal, check the load carried, using a multimeter to measure the resistance (when normal) should not be to zero, the measured voltage should be 220v, or vice versa, the load carried with a short-circuit phenomenon, should be replaced in a timely manner or overhaul, inspection of electrical wiring or light fixtures.
