What is resistance temperature detector (RTD) and mention some examples?

What is resistance temperature detector (RTD) and mention some examples?
by

1 Answer

Answer :

Resistance temperature detector is an instrument, which is used to measure temperature. This uses the property that the resistance of a metal changes (increases of decreases) with temperature. This is very accurate. These will be a wire, which will senses the temperature and changes its resistance as the temperature changes. This varying in resistances if measures by an external electronic or electrical circuit calibrated to measure temperature. Different types of RTD’s are Platinum, copper, nickel.  
by

Related questions

Which sensor shown in the illustration develops its own conditioning and point setting and 'reports' directly to the 'annunciator'? EL-0094 A. Transducer B. Resistance Temperature Detector (RTD) C. Pressure Switch D. Thermocouple

Description : Which sensor shown in the illustration develops its own conditioning and point setting and 'reports' directly to the 'annunciator'? EL-0094 A. Transducer B. Resistance Temperature Detector (RTD) C. Pressure Switch D. Thermocouple

Last Answer : Answer: C

Describe construction and working of Resistance Temperature Detector (RTD).

Description : Describe construction and working of Resistance Temperature Detector (RTD).

Last Answer : RTD:  Construction and working: Resistance thermometer bulbs consist of a coil of fine wire wound or in a frame of insulating material. The resistance wire itself must be homogeneous in order to ... surrounding it. Thus RTD is used to measure temperature in terms of change in resistance.

The sensor connected to 'signal conditioner' (6000F125) shown in the illustration is a/an ______________. EL-0094 A. thermocouple B. transducer C. inverter D. RTD

Description : The sensor connected to 'signal conditioner' (6000F125) shown in the illustration is a/an ______________. EL-0094 A. thermocouple B. transducer C. inverter D. RTD

Last Answer : Answer: B

The sensor connected to 'signal conditioner' (6000AH170) shown in the illustration is a/an _____________. EL-0094 A. thermocouple B. transducer C. inverter D. RTD

Description : The sensor connected to 'signal conditioner' (6000AH170) shown in the illustration is a/an _____________. EL-0094 A. thermocouple B. transducer C. inverter D. RTD

Last Answer : Answer: A

The sensor connected to 'signal conditioner' (6000F085) shown in the illustration is a/an ______________. EL-0094 A. thermocouple B. transducer C. inverter D. RTD

Description : The sensor connected to 'signal conditioner' (6000F085) shown in the illustration is a/an ______________. EL-0094 A. thermocouple B. transducer C. inverter D. RTD

Last Answer : Answer: D

Draw and explain temperature measurement using RTD. State its advantages and disadvantages.

Description : Draw and explain temperature measurement using RTD. State its advantages and disadvantages.

Last Answer : https://youtu.be/rYcglFW4y0I

Compare RTD and thermistor on the basis of temperature coefficient , linearity, temperature range and cost.

Description : Compare RTD and thermistor on the basis of temperature coefficient , linearity, temperature range and cost.

Last Answer : Parameters RTD Thermistors Temperature coefficient  It has positive temperature Coefficient (PTC) of Resistance. It has both positive and negative temperature Coefficient (PTC and NTC) of Resistance. ... -270oC to 2800oC -150oC to 300oC Cost High cost Low cost

What device is similar to an RTD but has a negative temperature coefficient?

Description : What device is similar to an RTD but has a negative temperature coefficient?  A) Strain gauge B) Thermistor C) Negative-type RTD D) Thermocouple

Last Answer : What device is similar to an RTD but has a negative temperature coefficients 

Which of the listed devices may be installed on a large diesel-electric alternating current propulsion generator? A. Temperature detector coils inserted in the stator slots for measuring stator temperature. B. A CO2 fire extinguishing system. C. Electric space heaters to prevent condensation of moisture. D. All of the above.

Description : Which of the listed devices may be installed on a large diesel-electric alternating current propulsion generator? A. Temperature detector coils inserted in the stator slots for measuring stator temperature. B. ... . C. Electric space heaters to prevent condensation of moisture. D. All of the above.

Last Answer : Answer: D

Which of the listed devices may be installed on a large turbo-electric alternating current propulsion generator? A. Temperature detector coils inserted in the stator slots for measuring stator temperature. B. A CO2 fire extinguishing system. C. Electric space heaters to prevent condensation of moisture. D. All of the above.

Description : Which of the listed devices may be installed on a large turbo-electric alternating current propulsion generator? A. Temperature detector coils inserted in the stator slots for measuring stator temperature. B. A ... . C. Electric space heaters to prevent condensation of moisture. D. All of the above.

Last Answer : Answer: D

By which of the following methods the temperature rise of windings and other parts may be determined ? (a) Thermometer method (6) Resistance method (c) Embedded temperature detector method (d) Any of the above

Description : By which of the following methods the temperature rise of windings and other parts may be determined ? (a) Thermometer method (6) Resistance method (c) Embedded temperature detector method (d) Any of the above

Last Answer : (d) Any of the above

Give construction working principle of RTD with a neat sketch.

Description : Give construction working principle of RTD with a neat sketch.

Last Answer : Diagram Working: An RTD (resistance temperature detector) is a temperature sensor that operates on the measurement principle that a material's electrical resistance changes with temperature. ... change m resistance of the RTD, which is then used to calculate change in temperature.

Describe the importance of three wire and four wire configuration for RTD with suitable circuit diagram.

Description : Describe the importance of three wire and four wire configuration for RTD with suitable circuit diagram.

Last Answer : Three wire RTD: Four wire RTD: Three wire configurations is used to help the circuit compensate for lead wire resistance, and thus provide a truer indication of the measured ... the leads. To get the optimum performance, it is generally best to specify the RTD configuration. 

Compare RTD and Thermistor

Description : Compare RTD and Thermistor

Last Answer : RTD Thermistor Made of metals which are good conductors of electricity e.g. copper, platinum Nickel Made of metallic oxides such as cobalt, manganese, nickel etc. Positive temperature coefficient ... small in size. Cost is high  They are not costlier as compared to RTD

A ground is indicated by the ground-detecting system on the main electrical switchboard. The FIRST step in locating the actual ground is to _____________. A. close all circuit breakers in the distribution panel until the ground detector indicates normal B. open the individual circuit breakers, one by one until the ground detection system indicates normal C. change over generators D. check each circuit with a megohmmeter

Description : A ground is indicated by the ground-detecting system on the main electrical switchboard. The FIRST step in locating the actual ground is to _____________. A. close all circuit breakers in ... ground detection system indicates normal C. change over generators D. check each circuit with a megohmmeter

Last Answer : Answer: B

The voltage at the reference electrode of the circuit shown in the illustration is applied to the input of a/an ______________. EL-0090 A. class A detector whose output drives an autotransformer B. operational amplifier whose output controls a step-up voltage reactor C. amplitude modulator whose output drives an 2-stage isolation transformer D. magnetic amplifier whose output controls a saturable reactor

Description : The voltage at the reference electrode of the circuit shown in the illustration is applied to the input of a/an ______________. EL-0090 A. class A detector whose output drives an ... drives an 2-stage isolation transformer D. magnetic amplifier whose output controls a saturable reactor

Last Answer : Answer: D

Indicate the HPLC detector that is most sensitive to change in temperature : (A) PDA detector (B) Refractive Index detector (C) Electrochemical detector (D) Fluorescence detector

Description : Indicate the HPLC detector that is most sensitive to change in temperature : (A) PDA detector (B) Refractive Index detector (C) Electrochemical detector (D) Fluorescence detector

Last Answer : (B) Refractive Index detector

The calibration of an HPLC detector can be evaluated by measurement of? A. Retention time B. Temperature C. Flow rate accuracy D. Intensity of the peak

Description : The calibration of an HPLC detector can be evaluated by measurement of? A. Retention time B. Temperature C. Flow rate accuracy D. Intensity of the peak

Last Answer : D. Intensity of the peak

In preparing to take insulation resistance readings on a main generator, the windings should be grounded for about 15 minutes prior to the test to _____________. A. allow accurate zeroing of the meter B. help the windings to cool to ambient temperature C. release any residual capacitive charge from the windings D. help the windings to cool to the same temperature as the ground test connection

Description : In preparing to take insulation resistance readings on a main generator, the windings should be grounded for about 15 minutes prior to the test to _____________. A. allow accurate zeroing of the meter ... the windings D. help the windings to cool to the same temperature as the ground test connection

Last Answer : Answer: C

A disadvantage of using the configuration in the illustrated circuit is _________. EL-0045 A. no current gain B. high input resistance C. high voltage gain D. becomes unstable with an increase of ambient temperature

Description : A disadvantage of using the configuration in the illustrated circuit is _________. EL-0045 A. no current gain B. high input resistance C. high voltage gain D. becomes unstable with an increase of ambient temperature

Last Answer : Answer: A

The advantage of using the illustrated circuit configuration is _________. EL-0045 A. high input resistance B. high current gain C. the best stability with an increase in temperature D. the input and output are 180 degrees out of phase

Description : The advantage of using the illustrated circuit configuration is _________. EL-0045 A. high input resistance B. high current gain C. the best stability with an increase in temperature D. the input and output are 180 degrees out of phase

Last Answer : Answer: C

The resistance of electric wire will decrease as its _______________. A. length increases B. cross-sectional area increases C. temperature increases D. percent of metallic purities increases

Description : The resistance of electric wire will decrease as its _______________. A. length increases B. cross-sectional area increases C. temperature increases D. percent of metallic purities increases

Last Answer : Answer: B

The existing resistance of a conductor is dependent upon its length, cross-sectional area, _____________. A. temperature and insulation B. material and insulation C. resistive coefficient and material D. material and temperature

Description : The existing resistance of a conductor is dependent upon its length, cross-sectional area, _____________. A. temperature and insulation B. material and insulation C. resistive coefficient and material D. material and temperature

Last Answer : Answer: D

When the current flow through a copper wire increases, its _____________. A. resistance will decrease B. insulation will burn C. temperature will increase D. conductivity will increase

Description : When the current flow through a copper wire increases, its _____________. A. resistance will decrease B. insulation will burn C. temperature will increase D. conductivity will increase

Last Answer : Answer: C

The resistance of most conducting materials will change as a result of temperature change. The resistance of copper will _____________. A. increase as temperature decreases B. decrease as temperature decreases C. remain the same between 20°F and 110°F D. remain the same between 68°F and 230°F

Description : The resistance of most conducting materials will change as a result of temperature change. The resistance of copper will _____________. A. increase as temperature decreases B. decrease as temperature decreases C. remain the same between 20°F and 110°F D. remain the same between 68°F and 230°F

Last Answer : Answer: B

You are testing the insulation in an AC generator with a megohmeter. The resistance value of a dry, clean winding will ____________. A. continue to rise as the test potential is maintained, becoming fairly steady as the leakage current stabilizes B. remain constant as the temperature of the windings increases C. continue to drop as the potential is maintained, becoming fairly steady after 5 to 7 minutes D. stabilize after approximately 2 to 4 minutes of fluctuation

Description : You are testing the insulation in an AC generator with a megohmeter. The resistance value of a dry, clean winding will ____________. A. continue to rise as the test potential is maintained, ... fairly steady after 5 to 7 minutes D. stabilize after approximately 2 to 4 minutes of fluctuation

Last Answer : Answer: A

Most conducting materials such as copper, aluminum, iron, nickel, and tungsten _____________. A. increase in resistance with increased temperature B. increase in resistance with decreased temperature C. decrease in resistance with increased temperature D. increase in conductance with increased temperature

Description : Most conducting materials such as copper, aluminum, iron, nickel, and tungsten _____________. A. increase in resistance with increased temperature B. increase in resistance with decreased ... C. decrease in resistance with increased temperature D. increase in conductance with increased temperature

Last Answer : Answer: A

An important characteristic of the device shown in figure 'B' of the illustration as compared with conventional NPN or PNP transistors is its ____________. EL-0065 A. higher temperature sensitivity B. higher power ratings C. very high input resistance D. all of the above

Description : An important characteristic of the device shown in figure 'B' of the illustration as compared with conventional NPN or PNP transistors is its ____________. EL-0065 A. higher temperature sensitivity B. higher power ratings C. very high input resistance D. all of the above

Last Answer : Answer: C

An insulation resistance test is performed on a particular piece of electric equipment. In addition to the resistance reading, what information listed below should be entered in the electrical log? A. The maximum allowable operating temperature of the machine. B. The temperature of the machine at the time the resistance reading was taken. C. The normal temperature rise of the machine. D. The complete nameplate data from the resistance test instrument used to obtain the reading.

Description : An insulation resistance test is performed on a particular piece of electric equipment. In addition to the resistance reading, what information listed below should be entered in the electrical log? A. ... D. The complete nameplate data from the resistance test instrument used to obtain the reading.

Last Answer : Answer: B

Electric strip heaters are used in motor controllers to _____________. A. prevent freezing of movable contacts B. keep the components at their design ambient temperature C. prevent condensation of moisture D. minimize resistance in internal circuits

Description : Electric strip heaters are used in motor controllers to _____________. A. prevent freezing of movable contacts B. keep the components at their design ambient temperature C. prevent condensation of moisture D. minimize resistance in internal circuits

Last Answer : Answer: C

The rated temperature rise of an electric motor is the _____________. A. average temperature at any given latitude B. normal temperature rise above the standard ambient temperature at rated load C. average temperature rise due to resistance at 10% overload D. permissible difference in the ambient temperature of the motor due to existing weather conditions

Description : The rated temperature rise of an electric motor is the _____________. A. average temperature at any given latitude B. normal temperature rise above the standard ambient temperature at rated load ... D. permissible difference in the ambient temperature of the motor due to existing weather conditions

Last Answer : Answer: B

A semiconductor that decreases in resistance with an increase in temperature is known as a _____________. A. resistor B. thermistor C. diode D. thermopile

Description : A semiconductor that decreases in resistance with an increase in temperature is known as a _____________. A. resistor B. thermistor C. diode D. thermopile

Last Answer : Answer: B

What are the effects of temperature on resistance?

Description : What are the effects of temperature on resistance?

Last Answer : The effects of temperature on resistance are a. In certain pure metals such as gold, copper, silver, aluminium etc. the resistance increases with increasing temperature at fairly regular ... increasing temperature at fairly regular manner. Such materials posses negative co-efficient of resistance.

What is the temperature co-efficient of resistance?

Description : What is the temperature co-efficient of resistance?

Last Answer : Temperature co-efficient of the resistance of any substance is, change in its original resistance due to the change in temperature. The temperature co-efficient of resistance of material is the ratio of ... of the material (strictly at 0°C). Formula for the resistance measurement is,

The temperature of resistance furnaces can be controlled by changing the: (A) applied voltage (B) number of heating elements (C) circuit configuration (D) All of the above

Description : The temperature of resistance furnaces can be controlled by changing the: (A) applied voltage (B) number of heating elements (C) circuit configuration (D) All of the above

Last Answer : Ans: D Temperature of resistance furnaces can be controlled by changing either applied voltage or by number of heating elements or by circuit configuration.

Mention some examples of utility software. -Technology

Description : Mention some examples of utility software. -Technology

Last Answer : Data compression utilities, virus protection utilities and disk defragmentation utilities.

Mention any two features of plantation farming stating two examples. -Geography

Description : Mention any two features of plantation farming stating two examples. -Geography

Last Answer : Two features of plantation farming are : 1. Mono culture is practiced. 2. Farm lands are large in size. Examples : Rubber and tea.

Give three examples of power sharing in India. Also mention the social/moral value it strengthens. -SST 10th

Description : Give three examples of power sharing in India. Also mention the social/moral value it strengthens. -SST 10th

Last Answer : (i) Reservation of seats for SC and ST in Lok Sabha : This provides equal opportunity even to depressed classes. (ii) Reservation of seats for women in local government : This leads to ... of legislative powers between the Union and the state govemments. It strengthens the spirit of democracy.

Mention examples of single issue and long-term movements and distinguish between the two. -SST 10th

Description : Mention examples of single issue and long-term movements and distinguish between the two. -SST 10th

Last Answer : Most of the movements are issue-specific movements that seek to achieve a single objective within a limited time frame. For example, the Nepalese movement for democracy arose with the specific ... organisation which coordinates the activities of a large number of people's movements in our country.

Mention any two features of plantation farming stating two examples. -SST 10th

Description : Mention any two features of plantation farming stating two examples. -SST 10th

Last Answer : (i) A single crop is grown on a large estate with modem and scientific techniques mainly for trade. (ii) It is a labour intensive method of farming and requires excellent managerial skills, technical know-how and huge capital investment. Example: Tea, Coffee, Coconut, Rubber etc.

Mention the categories of instruction and give two examples for each category

Description : Mention the categories of instruction and give two examples for each category

Last Answer : The instructions of 8085 can be categorized into the following five • Data transfer MOV Rd,Rs STA 16-bit • Arithmetic ADD R DCR M • Logical XRI 8-bit RAR • Branching JNZ CALL 16-bit • Machine control HLT NOP

What is zoophily? Mention the four kinds of zoophily with examples.

Description : What is zoophily? Mention the four kinds of zoophily with examples.

Last Answer : Ans: Pollination by animals is called as zoophily. The four types are as follows 1. Entomophily: it is pollination by insects. Ex: Cestrum 2. Ornithophily: Pollination by birds. Ex: Bignonia ... by Snails and slugs. Ex: Aroideae  4. Cheiropteriphily: Pollination by bats. Ex: Kigelia pinnata

Mention some of the applications of controlled rectifier.

Description : Mention some of the applications of controlled rectifier.

Last Answer : a. Steel rolling mills, printing press, textile mills and paper mills employing dc motor drives. b. DC traction c. Electro chemical and electro-metallurgical process d. Portable hand tool drives e. Magnet power supplies f. HVDC transmission system

Mention some of the applications of Directional Over-Current relays?

Description : Mention some of the applications of Directional Over-Current relays?

Last Answer : 1. Double end fed power system 2. Single end fed system of parallel feeders 3. Ring main feeder system

Mention the factors on which hysteresis loss depends?

Description : Mention the factors on which hysteresis loss depends?

Last Answer : (i) Quality and amount of iron in the core (ii) Flux density and (iii) Frequency.

Mention the uses of damper windings in a synchronous machine?

Description : Mention the uses of damper windings in a synchronous machine?

Last Answer : 1. Damper winding is used to reduce the oscillations developed in the rotor of alternator when it is suddenly loaded. 2. The damper winding is used to start the synchronous motor as an induction motor.

Mention the properties of oil used in transformers.

Description : Mention the properties of oil used in transformers.

Last Answer : The following are the desirable properties of transformer oil: -->It should be free from moisture --> It should have high dielectric strength --> It should have thermally stability and higher thermal conductivity -->It should be contaminated by temperature rise.

Mention different types of speed control of slip ring induction motor?

Description : Mention different types of speed control of slip ring induction motor?

Last Answer : a) By changing supply frequency b) By changing the number of stator poles c) By rotor rheostat control d) By operating two motors in cascade