tory burch outlet Microammeter resistance measurem
 

Microammeter resistance measurement error analysis


Change. So every time the need to redefine the current microammeter f, so △ fl and △ f2 are not zero. By ( 8 ), we have : r, R! barrier ! ± 2. f ( base ± all ! V1) --- V-2A-V1_V-1 / ',ghd planchas, V2 a V --- z --- V - l -'------ V ---- 1 - V --- 2-/Production (V2 a V1) as △ fl,tory burch outlet, △ f2 and △, A is an independent measurement of f1, f2,abercrombie ireland, I, the absolute error , so the other side microammeter resistance determined as a maximum error of = l · {+ · l △, which △ V, △ r , respectively,tory burch outlet, the results for each measurement, the absolute error . When taking V1 = 2v2 , the wait partial method error formula △ + △ R = number of students △ f (10) 3 Conclusion of existing instruments in this laboratory conditions [ DC voltmeter C31V ( Multi-range 0.5 ) , DC ammeter ( range 1 groan A1.5 level) , knife- Q1 -type resistance box (99999.9n0.1 level) ] , deduced from the above ( 9) ( 10) relationship analysis, experimental measurement of the relative error caused by not less than 9% , indeed should not be ignored. In addition, to reduce measurement error , and experimental results to improve the experimental accuracy , the meter accuracy under certain conditions , should try to work the circuit current, and voltage is small, that circuit (I) , should make the RA and R Day try to dig create low-voltage, high current experimental conditions . This is the guiding experimental operation on R and R values ​​of selected size and microammeter deflection value basis. If you ignore these factors, measurement error will exceed the allowed range. Further analysis , because the current value of the table olive Ann f = nh, ( the number of cells is a pointer deflection is ammeter sensitivity ), so from the perspective of reducing the measurement error should select the high sensitivity of the header .
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