万用表的使用(Use of a multimeter) The foot will test the transistor transistor test are respectively inserted into the seat Ence of R * 1, R * 10. R * 100, R * IK, R * 10K R * 1 center scale is 16. 5 Omega 2. 5 as a percentage scale arc length calculation 10 to indicate the percentage of the -10d B~+22 D B to calculate the level of audio 0dB=lmw 600 ohm hFE 0~300hFE transistor DC inductance capacitance 20~1000H amplification 0. 001~0. 3uf five, note 10 thousand tables are double protection device, but still should abide by the following rules, to avoid accidental damage. (1) the measurement of high voltage or high current To avoid damage, should cut off the power switch in the case, transfer amount limit. (2) the unknown amount of voltage or current, should first choose the most high, for the first time to read the value, can be gradually transferred to the appropriate location in order to obtain more accurate readings and avoid burning the circuit. (3) accident due to overload and burn out the fuse, the fuse box can open the table in the same model (). 2. measuring pressure, to stand in the drying of the insulating board, and one hand operation, prevent accidents. 3. resistance stall battery replacement should be checked regularly to ensure the accuracy of measurement usually. No multimeter should gear disk to exchange 250V files: for long time should remove the batteries
