万用表实验报告

mf500-47211 220v250v228v220v2 c3 15ubcucduabubduad20k/v 14 i50ar22e5500,abcddcfdfhfccdhfffdd31.5v11ucd?i/i?ra/r 3?i?3.1/121?40?a1 231 2 1/33 1 2 r/55r3 1_ 1. 2. 1. 2 1. 1 2 1 3 1 4 1 5 4700pfin40079018 11. 2 3 4 ut39e1 ut39e2819999012 a200mv2v20v200v1000v200mv0.0532v20v200v0.13, 1000v0.15510m b2v20v200v750v 2v20v200v0.510, 750v0.8152m 40hz400hz c 2ma200ma20a2ma0.55200ma0.85, 20a210d 2ma200ma20a2ma0.810200ma1.210, 20a2.51040hz400hz e 2002k20k20m200m2000.5102k20k20m0.31200m-100510f 2nf20nf200nf20f410400hz 40mvrmsg 2khz20khz2khz2520khz1.55hhfevce2.8vibo10a01000 i70 31 2 holdlcd3 hfe4 power 5 6 7 a20a 200ma20a20a8 ma 200ma 9 v11 hfe cbenpnpnp4 hz 1 2 a b vhz40400hzc vhz220v147f20k4.7f2md mv500mv800mv200mv300mv00011000npnpnppnbebce hfenpnpnphfehfe000f 70111 121r51r7w11-113 1-114 1d11d21-1 15 bg2bg31-1 2 21 vcc1-2 22 i1-2 23 1-3300mvp_pvinvin1-3 24 1-3300mvp_pviniin1-3 3 1-41vp_p1-44 1. 1ac,2u=ir3 2. dvmdvm(a) , .(b) , 78dvm0.0001%. (c) . (d) (e) (f) , 10m?, 104 m?. (g) . 1 dvm: (a) ?u= ? ?% ux ? (b) ?u= ? ?% ux ?% um2? io =3 dvm hzghziru1. 2. 3. 1. ut39a 2. af500-b3. 4. j2361-15. 6.7. 1. :0 123456789 1101001k10k100k1m10m100m1000m0.10.015%10%2. (1)(2) 3. 4. irri=e/(r+re=ir+irer riir)r1r2i1,i2 u1 ,u2u1=e-i1r u2=e-i2rr=u2-u1/i1-i2 e=u1+(u2-u1)/(i1-i2)i11. 13305%75(5%30.324k,3244, +-0(,)5x10782. 116v3. 4. 1x500ma2,3,510,15,202x2.5v2,3,510,15,2032,35,1015,20r=u2-u1/i1-i2 e=u1+(u2-u1)/(i1-i2)i1r=3.67e=1.44v5. .doc 1006 201004134192 16. 2.1.1ls?al6.1. 22.1.3 10 220101=2.2k 5% 5%10% 2222122x1=22 0.10.01 3939k39m 69.869869.8k 0 1 2 3 4 5 6 7 8 9 10-2