PENGUKURAN

TEKANAN

Bisrul Hapis Tambunan

TEKANAN

Didefenisikan sebagai gaya per satuan luas

Satuan tekanan sama dengan regangan:

N/m2 atau Pascal (Pa)

A

FP

Area

Forceessure ;Pr

Bisrul Hapis Tambunan

Tekanan absolut =

Tekanan pengukuran + Tekanan atmosfir

Bisrul Hapis Tambunan

Satuan Tekanan

1 atm = 14,696 pon per inci persegi abs

= 1,01325 Pa (N/m2)

= 2116 lbf/ft2

= 760 mmHg

1 bar = 105 Pa

1 mikro bar = 1 dyne/cm2

= 2,089 lbf/ft2

= 0,1 PaBisrul Hapis Tambunan

1 mmHg = 1333,22 mikro bar

= 133,322 Pa

1 PSI = 6894,76 Pa

Bisrul Hapis Tambunan

Manometer

measures contained gas pressure

U-tube Manometer Bourdon-tube gauge

Bisrul Hapis Tambunan

Manometer

Bisrul Hapis Tambunan

“Misteri” tabung - U

Evaporates Easily

VOLATILE

HIGH Vapor Pressure

Evaporates Slowly

LOW Vapor Pressure

AIR

PRESSURE

15psi

AIR

PRESSURE

15psi

AIR

PRESSURE

15psi

4 psi 2

ALCOHOL WATERBisrul Hapis Tambunan

„Net‟ PressureAIR

PRESSURE

15psi

AIR

PRESSURE

15psi

4 psi 2

ALCOHOL WATER

11 psi N E T P R E S S U R E 13 psi

11

psi

13

psi

Bisrul Hapis Tambunan

Barometer

(a) (b) (c)

Bisrul Hapis Tambunan

Tabung Bordon

Bourdon-tube gauge

Bisrul Hapis Tambunan

Bisrul Hapis Tambunan

Bellows

Bisrul Hapis Tambunan

Diafragma

Bisrul Hapis Tambunan

Kapsul

Bisrul Hapis Tambunan

Strain Gague

Bisrul Hapis Tambunan