Sprawozdanie 1
Miernictwo elektryczne i elektroniczne
Szafranek Karol
ETI 6.5/9

Nastawa	ΔR[Ω]	δ R[%]	Omomierz r [Ω]	ΔR[Ω]	δR[%]	Umax [V]	U[V]	I[A]	R[Ω]	ΔR[Ω]	δR[%]
88	0,056	0,064	88	0,71±0,3	0,8	21,6	6	0,065	92,31	2,6	3%
297	0,063	0,021	297	2,376±0,3	0,8	36,9	6	0,02	300	16,35	5%
1175	0,373	0,031	1173	9.384±0,3	0,8	47,5	6	0,005	1200	38,4	3.2%

Wzory
ΔR= Klasa₁ * nastawa₁/100% + …+Klasa_n*nastawa_n/100%
δ R= ΔR/Nastawa
δ R%= ρ R * 100%
R=U/I
U_max = I_max * R
δR=ΔU/U + ΔI/I
ΔR= δR*R

ΔR₁=0.04%*80/100% + 0.3%*8/100%= 0,032+0,024 = 0,056
ΔR₂=0.03%*200/100% + 0.04%*90/100% + 0.3%*7/100% = 0.06 + 0.036 + 0.021 = 0.063
ΔR₃= 0.03%*1000/100% + 0.03% * 100/100% + 0.04%*70/100% + 0.3%*5/100% = 0.3 +0,03 + 0,028 +0,015 =0,373

δ R₁=0.056/88 = 0.00064 ρ R₁%=0.00064*100%=0.064%
δ R₂=0.063/297=0.00021 ρ R₂%= 0.00021*100% = 0.021%
δR₃=0,373/1175=0,00031 ρR₃%=0.00031*100%=0.031%

ΔR₁=0.8%*80/100% + 0.8%*8/100% = 0,704+0.064 = 0.710
ΔR₂=0.8%*200/100% + 0.8%*90/100% + 0.8%*7/100%=1,6 + 0,72 + 0,056 = 2,376
ΔR₃= 0,8%*1000/100% + 0.8%*100/100% + 0.8%*70/100% + 0.8%*3/100% = 8 + 0,8 + 0,56 + 0,024 = 9.384

δ R_śr1= 0,710/88 *100%=0,8%
δ R_śr2= 2,376/297 * 100% =0,8%
δ R_śr3 =9.384/1173 * 100% =0,8%

U_max1=0.2*80 + 0,7*8 =16 + 5.6 =21,6
Um_ax2=0.07*200 + 0,2*90 + 0,7*7= 14 +18 + 4.9=36.9
U_max3=0,02*100 + 0,07*100 + 0,2*70 + 0,7*5 = 20+ 7 +14 + 3.5 =47.5

R₁= 6/0,065=92,31
R₂=6/0,02 = 300
R₃=6/0,005=1200

ΔU=0.5*7.5/100 + 0.5*7.5/75=0,0375+0,05=0.0875

δU =0,0875/6 * 100% = 1,46 %

ΔI= 0.5%*0.075A/100% + 0,5%*0,075/75%= 0,000875A

δI1=0,000875A * 100%/0,065 = 1.35%
δI2=0,000875A * 100%/0.02 = 4.38%
δI3= 0,000875A*100%/0.005 = 17.5%

δR=ΔU/U + ΔI/I

δR1=0,0875V/6V + 0,000875A/0.065A = 0,0145 + 0,0137 =0,0282
δR2=0.0875V/6V + 0,000875A/0.02A =0,0145 + 0,04 = 0,0545
δR3=0.0875V/6V+ 0,000875A/0.05A = 0,0145 + 0,175 = 0,032

ΔR= δR*R
ΔR1=0,0282*92,31=2.6
ΔR2=0,0545*300 = 16.35
ΔR3=0,032*1200= 38.4

δR1=(2.6/92.31)*100% = 3%
δR2=(16.35/300)*100%=5%
δR3=(38.4/1200)*100%=3.2%