Measurement system ppt
- 2. Measurement System Sensor Processor or Signal Conditioner Display RTD Potentiometer Strain Gage LVDT Wheatstone Bridge Operational Amplifier Digital Analog
- 3. RTD Sensor Display Processor or Signal Conditioner
- 4. Sensor Temperature Change in Resistance R hot = R ref (1 + (T hot – T cold )) T = 300 ºC R = 580 20 400 .0068 200 716.8 20 300 .0068 200 580.8 20 200 .0068 200 444.8 20 100 ..0068 200 308.8 T ref T hot Copper R ref R hot
- 5. Wheatstone Bridge – a circuit that measures Resistance of Change in resistance. R2 R1 R4 R3 Vs
- 6. Wheatstone Bridge – a circuit that measures Resistance of Change in resistance. X Y V X-Y = V out = V out RA RB RD RC Vs
- 7. At T ref = 20 ºC ; R 20 = 200 At T hot = 300ºC ; R 300 = 580.8 RA, RB, RD = 200 R hot = R ref (1 + (T hot – T cold )) V out = 0.653 V R A R B R D R SG Vs
- 8. Sensor RTD Processor Wheatstone Bridge T = 300 ºC R = 580 V out = 0.658 V To Represent 300 ºC the Display should be somehow significant and related T = 300 ºC 300 Sensor Wheatstone B. Amplifier Display T = 300 ºC R = 580 V out = 0.658 V V= 3.00 300 ºC
- 9. Sensor Wheatstone B. Amplifier Display T = 300 ºC R = 580 V out = 0.653 V V= 3.00 300 ºC What is the gain of the Amplifier to give an output of 3.0V from an input of 0.65 Amplifier Gain (A) = Voltage output Voltage input Amplifier Gain (A) = 3.000V 0.653 V A = 4.1 3.00V represent 300ºC
- 10. Sensor Wheatstone B. Amplifier Display R = 580 V out = 0.653 V V= 3.00 300 ºC 3.00V represent 300ºC T = 300 ºC Processor
- 11. Thank You For Listening