The resistance of a RTD, RT, at a given temperature T is given by the following equation
(a) The resistance of a RTD, RT, at a given temperature T is given by the following equation:
RT = R0 (1 + αT)
where R0 is the resistance of the RTD at the reference temperature 0°C, α is the temperature coefficient at 0 °C.
It is found that the resistance of the RTD are 130 Ω and 150 Ω at 10°C and at 50°C respectively. Calculate:
(i) the temperature coefficient a, and
(ii) the resistance of the RTD at 0°C, R0.
(b) The RTD in part (a) is used in the bridge circuit as shown in Fig. 210. Determine:
(i) at which temperature the bridge will balance,
(ii) the output voltage V0. at 100°C, and
(iii) the type of instrument most suitable for the measurement of V0.
Homework Answers
Add Answer to:
The resistance of a RTD, RT, at a given temperature T is given by the following equation
An RTD forms one arm of a Wheatstone bridge, as shown in Figure below.
An RTD forms one arm of a Wheatstone bridge, as shown in Figure below. The RTD in a balanced is used to measure a constant temperature, with the bridge operated mode. The RTD has a resistance of 25 V at a temperature of 0°C, and a thermal coefficient of resistance, α= 0.003925°C, The value of the variable resistance R1 must be set to 37 V to balance the bridge circuit. (1) Determine the temperature of the RTD. (2) Compare this circuit to the...
Problem 3 For the given measurement system, which measures temperature using an RTD, of type PT100,...
Problem 3 For the given measurement system, which measures temperature using an RTD, of type PT100, that is 100 Ohms at 0 C. If R2-R3 1000 Ohms, R1 110, At what temperature the bridge will be balanced, knowing that RTD is approximated with the given 1. equation Rold(1+0.004(change in temperature)) Rew= 2. If the amplifier has a gain of 10; determine accepted RA values of Rf and Rin RS N If the output of the amplifire is limited from -2.5...
Temperature Measurement Chapter 4 IT02 Curriculum Manual Enter the total change in the resistance of the...
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...
The temperature coefficient of resistance α in equation R(T)=R0[1+α(T−T0)] equals the temperature coefficient of resistivity α...
The temperature coefficient of resistance α in equation R(T)=R0[1+α(T−T0)] equals the temperature coefficient of resistivity α in equation ρ(T)=ρ0[1+α(T−T0)] only if the coefficient of thermal expansion is small. A cylindrical column of mercury is in a vertical glass tube. At 20 ∘C, the length of the mercury column is 12.0 cm. The diameter of the mercury column is 1.6 mm and doesn't change with temperature because glass has a small coefficient of thermal expansion. The coefficient of volume expansion of...
Resistance in metals increases with increasing temperature according to the equation, ρ(T) = ρo(1 + α(T - To)) where α is the temperature coefficient of resistivity and ρo is the resistivity at temperature To. For a particular wire α = 1.5 × 10-3 1/°C and
Resistance in metals increases with increasing temperature according to the equation, ρ(T) = ρo(1 + α(T - To)) where α is the temperature coefficient of resistivity and ρo is the resistivity at temperature To. For a particular wire α = 1.5 × 10-3 1/°C and the resistivity is ρo = 8.5 × 10-7 Ω⋅m at To = 125 °C.
The material constant B is to be determined for a particular thermistor using the circuit below. The thermistor has a resistance of 60 k at 25C. The reference resistor in the circuit, R1, has a resi...
The material constant B is to be determined for a particular
thermistor using the circuit below. The thermistor has a resistance
of 60 k at 25C. The reference resistor in the circuit, R1, has a
resistance of 130.5 k 2. The dissipation constant is 0.09mW/C. The
voltage source used for the measurement is constant at 1.564 V. The
thermistor is to be used at emperatures ranging from 100 to 150C.
Determine the value of B
Thermistors mple2 :The material constant...
Electrical Instrumentation and Measurements
1. (a) i. Briefly explain the three (3) main functions of instruments and give examples each. ii. Explain loading effects in a measurement system.(b) A Maxwell bridge in Fig 1 below is used to measure an inductive impedance. The bridge constants at balance are:R1 = 235 kΩ, C1 = 0.012 µF, R2 = 2.5 kΩ, R3 = 50 kΩFind the series equivalent of the unknown impedance. 2. (a) The power input to a 3-phase induction...
Classify following transducers (self-generator, modulator or modifier): i. a rotary potentiometer (resistance change) for angle measurement...
Classify following transducers (self-generator, modulator or modifier): i. a rotary potentiometer (resistance change) for angle measurement ii. a diode for temperature (voltage drop upon temperature) iii. a florescence-based sensor for radiation (emitting visible light upon incident radiation ray) iv. a mercury-in-glass (expansion in glass) thermometer v. a Bourdon tube (shape change) for pressure
Mini-Prj 2. Extraction of Thevenin and Norton Equivalent Circuits by LTspice Part A. Wheatstone B...
Mini-Prj 2. Extraction of Thevenin and Norton Equivalent Circuits by LTspice Part A. Wheatstone Bridge Circuit with a Voltage Source Vs R5 R1 R2 Vs RL R3 R4 For the circuit as shown below, given that R1= 9 Ω, R2= 17 Ω, R3= 9 Ω' R,-18 Ω, R5= 19 Ω , RL= 2 Ω ,V,-74 V I. Wheatstone Bridge Circuit Analysis (a) Determining the load voltage Vi-Vab for the Wheatstone bridge circuit with LTspice Submit Answer Tries 0/3 (b) Determining...
Mini-Prj 2. Extraction of Thevenin and Norton Equivalent Circuits by LTspice Part B. Wheatstone B...
Mini-Prj 2. Extraction of Thevenin and Norton Equivalent Circuits by LTspice Part B. Wheatstone Bridge Circuit with a Current Source Is R5 R1 R2 Is RL R3 R4 For the circuit as shown below, given that R1-22 Ω, R2-15 Ω, R3-28 Ω, R4-9 Ω, R5-29 Ω , R.-16 Ω, 1,-6 A. I. Wheatstone Bridge Circuit Analysis (a) Determining the load voltage VL-Vab for the Wheatstone bridge circuit with LTspice. Submit Answer Tries 0/4 (b) Determining the load current IL following...
Problem 3 For the given measurement system, which measures temperature using an RTD, of type PT100, that is 100 Ohms at 0 C. If R2-R3 1000 Ohms, R1 110, At what temperature the bridge will be balanced, knowing that RTD is approximated with the given 1. equation Rold(1+0.004(change in temperature)) Rew= 2. If the amplifier has a gain of 10; determine accepted RA values of Rf and Rin RS N If the output of the amplifire is limited from -2.5...
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...
The material constant B is to be determined for a particular
thermistor using the circuit below. The thermistor has a resistance
of 60 k at 25C. The reference resistor in the circuit, R1, has a
resistance of 130.5 k 2. The dissipation constant is 0.09mW/C. The
voltage source used for the measurement is constant at 1.564 V. The
thermistor is to be used at emperatures ranging from 100 to 150C.
Determine the value of B
Thermistors mple2 :The material constant...
Mini-Prj 2. Extraction of Thevenin and Norton Equivalent Circuits by LTspice Part A. Wheatstone Bridge Circuit with a Voltage Source Vs R5 R1 R2 Vs RL R3 R4 For the circuit as shown below, given that R1= 9 Ω, R2= 17 Ω, R3= 9 Ω' R,-18 Ω, R5= 19 Ω , RL= 2 Ω ,V,-74 V I. Wheatstone Bridge Circuit Analysis (a) Determining the load voltage Vi-Vab for the Wheatstone bridge circuit with LTspice Submit Answer Tries 0/3 (b) Determining...
Mini-Prj 2. Extraction of Thevenin and Norton Equivalent Circuits by LTspice Part B. Wheatstone Bridge Circuit with a Current Source Is R5 R1 R2 Is RL R3 R4 For the circuit as shown below, given that R1-22 Ω, R2-15 Ω, R3-28 Ω, R4-9 Ω, R5-29 Ω , R.-16 Ω, 1,-6 A. I. Wheatstone Bridge Circuit Analysis (a) Determining the load voltage VL-Vab for the Wheatstone bridge circuit with LTspice. Submit Answer Tries 0/4 (b) Determining the load current IL following...
Most questions answered within 3 hours.
-
Calculate the equillibrium constent K for a redox reaction that
has E°cell = -.98 V at...
asked 10 minutes ago -
A concave spherical mirror has a radius of curvature of
magnitude 19.6 cm.
(a) Find the...
asked 12 minutes ago -
3. draw a diagram of the magnetic field:
a. around a long straight wire with a...
asked 11 minutes ago -
If you titrated 30.0 mL of 0.1 M HCl with 0.1 M NaOH, indicate
the approximate...
asked 19 minutes ago -
NADH passes electrons into the electron transport chain. List
the carriers that would receive the electrons,...
asked 27 minutes ago -
A cylindrical cable with a resistivity of 1.6x10-8 Ω·m and cross
sectional area of 3x10-5 m^2...
asked 27 minutes ago -
True or False.
A consumer with convex preferences who is indifferent between
the bundles (5,2) and...
asked 31 minutes ago -
A diamond's index of refraction for red light, 656 nm, is 2.410,
while that for blue...
asked 44 minutes ago -
Compare HPLC, SPE, and GC. Identify the differences, the
advantages, and the weaknesses of each method.
asked 45 minutes ago -
Characteristic x-rays emitted by potassium have a wavelength of
0.374 nm. What is the energy of...
asked 47 minutes ago -
there is a function to create two random numbers between 1 and
25 and a function...
asked 1 hour ago -
At a certain temperature, the ?pKp for the decomposition of
H2SH2S is 0.832.0.832.
H2S(g)↽−−⇀H2(g)+S(g)H2S(g)↽−−⇀H2(g)+S(g)
Initially, only...
asked 59 minutes ago