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. Ry- Ry- 100 0 R- 25 oc and balanced bridge conditions RTD Figure 1: Wheatstone bridge circuit

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. Ry- Ry- 100 0 R- 25 oc and balanced bridge conditions RTD Figure 1: Wheatstone bridge circuit

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.3DP

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To determine the thermal conductivity of a structural material, a large 15-cm-thick slab of the material is subjected to a uniform heat flux of 2500 W/m2 while thermocouples embedded in the wall at 2.5 cm. intervals are read over a period of time. After the system had reached equilibrium, an operator recorded the thermocouple readings shown below for two different environmental conditions: Distance from the Surface (cm) Temperature (C) Test 1 0 40 5 65 10 97 15 132 Test 2 0 95 5 130 10 168 15 208 From these data, determine an approximate expression for the thermal conductivity as a function of temperature between 40 and 208C.
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An RTD forms one arm of a Wheatstone bridge, as shown in picture. The RTD is used to measure a constant temperature, with the bridge operated in a balanced mode. The RTD has a resistance of 25 Ω at a temperature of 0°C, and a thermal coefficient of resistance, α = 0.003925°C-1. The value of the variable resistance R1 must be set to 41.485 Ω to balance the circuit, with the RTD in thermal equilibrium with the measuring environment. jhow to Determine the temperature of the RTD?
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