Question

Temperature Measurement Chapter 4 IT02 Curriculum Manual Enter the total change in the resistance of the RTD Transducer over the 4.5a temperature range 20-50°C in 4.5b Is the resistance/temperature characteristic lincar? Yes or No 4.5e Enter your estimated (extrapolated) resistance of the RTD Transducer from the graph at 0°C. During the exercise, the current flowing was of the order of ImA. Since the applied voltage was +5V, the total circuit resistance was therefore of the order of Skn (which you can see from the setting of the 10kn slider resistor). The variation of resistance of the RTD Transducer therefore had little effect on the circuit current and hence the voltage drop across it represented the resistance value reasonably accurately. The current of ImA in the RTD represents a very low power dissipation in the RTD. The self-heating effect would produce a temperature rise of 0.02°C Calculate the power dissipation in the RTD Transducer at a temperature of 50°C when the standard circuit current of ImA flows in it. uw Power dissipation in the RTD Transducer- 4.5d Enter your calculated value of the power dissipated in the RTD Transducer in μW. 4.5e A platinum RTD Transducer has resistance of 1000 at 0°C and 1380 at 100°C. Its resistance at 50°C will be: D138 C 19'C d188°C 150°C 4.5f A platinum RTD Transducer has resistance of 100 2 at 0°C and 138 2 at 100°C. The temperature when its resistance is 115.2 2 will be: 5.78 C I5.2c 30.4°C 40°C 58 IJ Technical Systems

Answer 1

4.5.E.) Platinum RTD relation,

☆ Platinum RTD transducer shows linear relationship,

☆ For the linear relation, any intermediate value can be calculated by INTERPOLATION method.

Formula,

R-R1 T-T1 T2- Ti R2 Ri

GIVEN,

R1 1002, R2= 1382, T1 0'C, T2 100 C

T 50°C, R?

50 0 R-100 100-0 138 100

50 x 38 = R- 100 100

BR=11992

4.5.f.) Same Platinum RTD,

☆ It shows linear relationship,

Formula,

R-R1 T-T1 T2- Ti R2 Ri

Given,

R1 1002, R2= 1382, T1 0'C, T2 100 C

T =?, R= 115.2

T-0 115.2 100 100-0 138 100

15.2 x 100 T = 38

T = 40°C

☆☆ Please comment below if you have any doubt regarding this question before rating this answer.

In above first two question it is not mention what type of RTD it is,

☆ Mainly their are two type of RTD,

I.) LINEAR RTD,

II.) QUADRATIC RTD.

In question 4.5b.) If it is Platinum RTD then it shows linear Characteristics.