, . , , : , .
. T
RT = R 0(1 +AT+BT 2). (10.1)
: 1000 , 200 , (10.1) .
. , , ( , ),
RT = R 0 exp[α(T T 0)].
, α i. ( R 0 Rk ).
:
S = ∆ R / ∆ T (/ ),
∆ T ∆ R . ∆ T = 5 .
S , . S, .
, , .
, . .
: 1 (Rt 1) T2 (Rt 2), T3 (Rt 3) 5 (Rt 5).
1 (Rt 1) . , .
, . . 10.1:
:
PV 2 - 69000;
PV 1 - 265;
1 - , ;
|
|
PV 3 - 7-16;
SB 1 - .
:
T1 (Rt 1) - 293-01;
2 (Rt 2) - -1;
T3 (Rt 3) - 255;
5 (Rt 5) - 233;
233 (Rt 5):
○ α i:
t = 1020 α = 3,920 ×10-2 1/ ,
t = 2030 α = 3,824 ×10-2 1/ ,
t = 3040 α = 3,229 ×10-2 1/ ;
○ :
t , R ,
10,01 758,0,
20,11 510,0,
29,89 351,0,
40,03 253,0,
49,60 195,0.
255 (Rt 3):
α = 0,00148 1/ ;
0 R 0 = 614,47 .
-1 (Rt 2) .
293 (Rt 1):
= 0,004112 1/;
0 R 0 = 49,99 .
. 220 4 . , . t < 0 7-16 ( ), 2 (Rt2), 3 (Rt3) 5 (Rt5) 3- .
, , 7-16 : 0; +5; +10; +15; +20; +25; +30; +35; +40; +45; +50 º.
.
. , | 1(Rt 1) | 2(Rt 2) | 3(Rt 3) | 5(Rt 5) | ||||
t , | R , | R , | t , | ∆, | R , | t , | ∆, | |
. . |
.
3 5 , : t = t 0 + ln(R / R 0) / α, t 0 R 0 ( ). .
11