Presentasi sedang didownload. Silahkan tunggu

Presentasi sedang didownload. Silahkan tunggu

TEMPERATURE MEASUREMENT  Galileo (1592) Colored alcohol  Gabriel Fahrenheit (1700) Ice water (0 o ) - Blood temperature (96 o )  Anders Celcius (1742)

Presentasi serupa


Presentasi berjudul: "TEMPERATURE MEASUREMENT  Galileo (1592) Colored alcohol  Gabriel Fahrenheit (1700) Ice water (0 o ) - Blood temperature (96 o )  Anders Celcius (1742)"— Transcript presentasi:

1 TEMPERATURE MEASUREMENT  Galileo (1592) Colored alcohol  Gabriel Fahrenheit (1700) Ice water (0 o ) - Blood temperature (96 o )  Anders Celcius (1742) Melting point of ice (0 o ) Boiling point of water (100 o )  William Thomson, Lord Kelvin (1800) K = o C + 273.15 (Absolute temperature)  W.J.M. Rankine o R = o F + 459.67

2 INTERNATIONAL PRACTICAL TEMPERATURE SCALE IPTS-68 EQUILIBRIUM POINTK OCOC Triple Point of Hydrogen 13.81-259.34 Liquid/Vapor Phase of Hydrogen 17.042-256.108 Boiling Point of Hydrogen 20.28-252.87 Boiling Point of Neon 27.102-246.048 Triple Point of Qxygen 54.361-218.789 Boiling Point of Neon 90.188-182.962 Triple Point of Water 273.16.01 Boiling Point of Water 373.16100 Freezing Point of Zinc 692.73419.58 Freezing Point of Silver 1235.08961.93 Freezing Point of Gold 1337.581064.43

3 TEMPERATURE SENSORS  THERMOCOUPLE Thomas Seebeck  RESISTANCE TEMPERATURE DETECTOR Humphry Davy, William Siemens  THERMISTOR Steinhart - Hart  IC TEMPERATURE TRANSDUCER LM335, LM 34, AD592

4

5 THERMOCOUPLE EFFECT SEEBECK – THERMOELECTRIC CIRCUIT THOMAS SEEBECK (1821) Dissimilar metals

6 e AB = Seebeck voltage  = Seebeck coefficient

7

8

9

10 TYPEMETAL  [  V/ o C] RANGE [ O C] BPlatinum 6 % Rhodium – Platinum 30 % Rhodium 60 to 1820 ENickel – Constantan58.5-270 to 1000 JIron – Constntan50.2-210 to 760 KNickel 10 % Cr – Nickel39.4-270 to 1372 N (AWG 14)Nicrosil – Nisil390 to 1300 N (AWG 28)Nicrosil – Nisil26.2-270 to 400 RPlatinum 13 % Rhodium – Platinum 11.5-50 to 1768 SPlatinum 10% Rhodium – Platinum 10.3-50 to 1768 TCopper - Constantan38-270 to 400 W-ReTungsten 5 % Rhodium – Tungsten 26 % Rhodium 19.50 to 2320

11

12 Temperature Conversion Equation : NBS POLYNOMIAL COEFFICIENTS NBS = National Bureau of Standard

13 Contoh Soal No. 1.1 Sebuah termokopel tipe J yang digunakan untuk mengukur temperatur suatu ruang pembakaran menghasilkan tegangan output sebesar 5,867 mV. Berapa tegangan outputnya bila diukur dengan termokopel tipe K ? Termokopel Tipe JTermokopel Tipe K Polynomial Coefficients oCoCmV oCoC aoao - 0,04886831004,0951606,539 a1a1 19873,1451104,5081706,939 a2a2 - 218614,541204,9191807,338 a3a3 11569199,81305,3271907,737 a4a4 - 2649175311405,7332008,137 a5a5 20184413141506,1372108,537

14 Jawab : Termokopel Tipe J Polynomial Coefficients aoao - 0,0488683 a1a1 19873,145 a2a2 - 218614,54 a3a3 11569199,8 a4a4 - 264917531 a5a5 2018441314

15 Termokopel Tipe K oCoCmV oCoC 1004,0951606,539 1104,5081706,939 1204,9191807,338 1305,3271907,737 1405,7332008,137 1506,1372108,537

16 PENGUKURAN TEMPERATUR MENGGUNAKAN VOLTMETER :

17 EQUIVALENT CIRCUITS : Tabel

18 Contoh Soal No. 1.2 Suatu temperatur diukur dengan menggunakan sebuah termokopel tipe J dan sebuah DVM (Digital Volt Meter). Temperatur ruangan pada saat pengukuran adalah 28 o C dan DVM menunjukkan angka 10,933 mV. Tentukan temperatur tersebut. Jawab : Dari tabel diperoleh :

19 External Reference

20 IRON-CONSTANTAN THERMOCOUPLE

21

22 REMOVING JUNCTIONS FROM DVM TERMINALS Isothermal Block = electrical insulator + good heat conductor

23

24 LAW OF INTERMEDIATE METALS A = Cu B = Fe C = C

25

26


Download ppt "TEMPERATURE MEASUREMENT  Galileo (1592) Colored alcohol  Gabriel Fahrenheit (1700) Ice water (0 o ) - Blood temperature (96 o )  Anders Celcius (1742)"

Presentasi serupa


Iklan oleh Google