Theory and Design for Mechanical Measurements
6th Edition
ISBN: 9781118881279
Author: Richard S. Figliola, Donald E. Beasley
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 8, Problem 8.14P
The thermocouple circuit in Figure 8.45 represents a J-type thermocouple with the reference junction having 72=0 °C. The output voltage is 13.777 mV. What is the temperature of the measuring junction, T\1
Figure 8.45 Thermocouple circuit for Problems 8.14 through 8.16; (1) measuring junction; (2) reference junction.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The objective of this question is to give the missing
information about the reading of thermocouple type J.
The temperatures are in degrees Celsius.
The temperature is 100 degrees and the
reference is 50. The reading voltage is (mV)
Choose...
The temperature is 95 and the reference is
zero, so the voltage is (mV)
Choose...
The reference is 30 and the reading voltage
is 8.687 mV, The temperature is
Choose... +
The temperature is 256 degrees and the
reference is 75 degrees. The reading
voltage is (mV)
Choose... +
A thermocouple is used to
measure the temperature T1. The
thermocouple reference junction
labeled 2 is at a temperature of
20°C. The voltage output is
measured using a potentiometer
and found to be 4.686 mV. What
is T1 in degrees
RK: if the temperature values are
not in the table, you have to use
interpolation.
Select one:
O a. 98
O b. 118
O c. 105
O d. 108
Previous page
Next page
1- A J-Type thermocouple
referenced to 80°F has a
measured output emf of 2.878
mV. What is the temperature of
the measuring junction?
Chapter 8 Solutions
Theory and Design for Mechanical Measurements
Ch. 8 - Prob. 8.1PCh. 8 - Fixed temperature points in the International...Ch. 8 - Answers to the following questions may be found in...Ch. 8 - Calculate the resistance of a platinum wire that...Ch. 8 - Plot the resistance of a platinum wire that is 5 m...Ch. 8 - An RTD forms one arm of a Wheatstone bridge, as...Ch. 8 - An RTD forms one arm (/?4) of a Wheatstone bridge,...Ch. 8 - Research and describe current state-of-the-art...Ch. 8 - Prob. 8.9PCh. 8 - 8.10 Estimate the required level of uncertainty in...
Ch. 8 - 8.11 A thermistor is placed in a 100 °C...Ch. 8 - Prob. 8.12PCh. 8 - Prob. 8.13PCh. 8 - The thermocouple circuit in Figure 8.45 represents...Ch. 8 - The thermocouple circuit in Figure 8.45 represents...Ch. 8 - The thermocouple circuit in Figure 8.45 is...Ch. 8 - 8.17 a. The thermocouple shown in Figure 8.46a...Ch. 8 - Prob. 8.18PCh. 8 - Prob. 8.19PCh. 8 - A temperature measurement requires an uncertainty...Ch. 8 - A temperature difference of 3.0 °C is measured...Ch. 8 - Complete the following table for a J-type...Ch. 8 - Complete the following table for a T-type...Ch. 8 - Prob. 8.24PCh. 8 - 8.25 You are employed as a heating, ventilating,...Ch. 8 - A J-type thermocouple for use at temperatures...Ch. 8 - A J-type thermocouple is calibrated against an RTD...Ch. 8 - A beaded thermocouple is placed in a duct in a...Ch. 8 - Consider a welded thermocouple bead that...Ch. 8 - Prob. 8.30PCh. 8 - Prob. 8.31PCh. 8 - Consider the typical construction of a sheathed...Ch. 8 - An iron-constantan thermocouple is placed in a...Ch. 8 - Figure 8.48 Schematic diagram for Problems 8.33,...Ch. 8 - Figure 8.48 Schematic diagram for Problems 8.33,...Ch. 8 - 8.36 In Example 8.5, an uncertainty value for Rf...Ch. 8 - The thermocouple circuit shown in Figure 8.49...Ch. 8 - Prob. 8.38PCh. 8 - 8.39 A thin-film heat flux sensor employs a K-type...Ch. 8 - A thin-film heat flux sensor has a sensitivity uV...Ch. 8 - 8.41 A T-type thermopile is used to measure...Ch. 8 - 8.42 A T-type thermocouple referenced to 0 °C is...Ch. 8 - A T-type thermocouple referenced to 0 °C develops...Ch. 8 - 8.44 A temperature measurement system consists of...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 4. Figure 2 shows a thermocouple circuit J-type used in one temperature measurement system. a) If the reference junction having T2 = 0°C and the output emf is 13.777 mV, what is the temperature of the measuring junction, T1? b) If the circuit produces an emf of 15 mV for T) = 750°C, what is T2? A T В A Measuring environment Potentiometer T2 Figure 2arrow_forwardIf the observed voltage given by a thermocouple of type K equals to 72.5 mV then for an amplification factor of 40 the actual voltage is: Select one: a. 0.0018125 mV. b. 0.0018125 V. c. 2.9 mV. d. 0.029 V.arrow_forward2:45 ull 4G A moodle1.du.edu.om 1- A J-Type thermocouple referenced to 80°F has a measured output emf of 2.878 mV. What is the temperature of the measuring junction? 2- Assume that the measured temperature is 250° F, what should be the output voltage if the reference temperature is 90 °F. RK: if the temperature values are not in the table, you have to use interpolation. Response to question 2: The measured output voltage (mV) Select one: O a. 2.764 b. 4.769 c. 5.762 O d. 3.768arrow_forward
- 3. A RTD forms one arm of a Wheatsone bridge, as shwon in Figure 1. The RTD is used to measure a constant temperature, with the bridge operated in a balanced mode. The RTD has a resistance of 252 at a temperature of 0°C, and a thermal coefficient of resistance, a = 0.003925°C''. The value of the variable resistance R, must be set to 41.4852 to balance the bridge circuit, with the RTD in thermal equilibrium with the measuring environment. Determine the temperature of the RTD. R;= Ry= 100 0 R- 25 a at oc and balanced bridge conditions RTD Figure 1: Wheatstone bridge circuitarrow_forwardA thermocouple produces an e.m.f. in mV according to the temperature difference between the sensor tip 0, and the reference junction 02 (also called gauge head where the reference junction is embedded inside the display unit for the thermocouple) such that e = a(0, – 0,) + B(e; – e; ) a = 3.5x10? mv/deg and B = 8.2x106 mV/deg. The gauge head is at 20°C. The output is 10 mV. Calculate the temperature of the sensor.arrow_forward. thermodynamics- A platinum resistance thermometer has a resistance of 5 ohm at 0°C and 2.5 ohm at 100°C Calculate the temperature when the resistance indicated is 10 ohm.arrow_forward
- Question 5.1: A thermopile is constructed with chromel-alumel materials. Five junctions are maintained at 400-C and five junctions are maintained at 100°C. The output of the thermopile is connected to a potentiometer. Answer the following questions: a) Draw the equivalent circuit and indicate all the given information. b) What is the voltage induced by the potentiometer? Given: Table 8.30 Temperature. °C -150 -100 <-50 <<-25 0 25 50 75 100 150 200 300 400 500 600 800 1000 1200 1500 1750 Thermal emf in absolute millivolts for commonly used thermocouple combinations, according to ITS(90) (Reference junction of 0 C)¹ Copper vs. Constantan (7) -4.648 -3.379 -1.819 -0.940 0 0.992 2.036 3.132 4.279 6.704 9.288 14.862 20.872 Chromel vs. Constantan (E) -7.279 -5.237 -2,787 -1.432 0 1.495 3.048 4.657 6.319 9.789 13.421 21.036 28.946 37.005 45.093 61,017 76.373 Iron vs. Constantan ( -6.500 -4.633 -2.431 -1.239 ( 1.277 2.585 3.918 5.269 8.010 10.779 16.327 21.848 27.393 33.102 45.494 57.953…arrow_forward(b) A special sprinkler system is comprised of three identical humidity sensors, a digital controller, and a pump, of which the reliability is 0.916, 0.965, and 0.983 respectively. The system configuration is shown in the figure below. Sensor Controller Pump Reliability block diagram of a sprinkler system. (b) Calculate the reliability of the sprinkler system. (c) Discuss the importance of safety in an engineering maintenance.arrow_forwardQ.1 a. Repeatability and reproducibility are ways of measuring precision, particularly in the field of engineering. i. What is an engineer's expectation when performing repeatability or reproducibility? ii. State a difference between repeatability and reproducibility in an experiment? b. Figure Q.1 shows the measurement data of two types of thermal transducers namely thermocouple. Турe E Туре К 6.8 4.2 20 40 60 80 100 Temperature Difference (°C) Voltage Output (mV)arrow_forward
- Q (2): A laboratory experiment has been executed to calculate the thermal conductivity of a specimen. The specimen is a bar with (Diameter= 0.04 m) and (length = 0.06 m). At steady state condition, the following data have been recorded: Voltage(V) Current(A) 8 0.8 T₁ (°C) 46.8 T₂ (°C) T3 (°C) 42.2 34.6 T. (°C) 31.4 By taking into consideration that the temperature changes linearly with position, refer to the figure aside, and calculate he thermal conductivity for the specimen (intermediate section). T₂ T₂ The face Told face T₂ T₂ 6 cm 4 cm 6 cm 4 cm 6 cm Hot section Int. section Cold sectionarrow_forwardWhat are the types of temperature sensors / devices used in industrial applications? (Give atleast 5 thermocouple sensors).arrow_forward3. Microfluidic channels will need to be fabricated on a key micro-scale sensor used by aerospace industries. Before running machining tests and analyzing machined quality, preliminary efforts are needed to evaluate selected materials and factors affecting machining process¹. Three material candidates have been selected, including 422SS (stainless steel), IN718 (nickel alloy), and Ti64 (titanium alloy) with their measured tensile properties and equation of true stress-true strain relationship used listed below. Tref25°C. Specifically, three factors will need to be evaluated, including different materials, temperature, and size effect. Please calculate true stress values for true strain ranging between 0-3 for each case listed below. Material A (MPa) & (S-¹) Tm (°C) 870 0.01 1520 422SS (Peyre et al., 2007) IN718 (Kobayashi et al., 2008) Ti64 (Umbrello, 2008) 980 1 1300 782.7 1E-5 1660 Material 422SS (CINDAS, 2011) IN718 (Davis, 1997) Ti64 (Fukuhara and Sanpei, 1993) 0 = X G (GPa) 1+ B…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
Heat Transfer – Conduction, Convection and Radiation; Author: NG Science;https://www.youtube.com/watch?v=Me60Ti0E_rY;License: Standard youtube license