Chapter 5 Measurement of Atmospheric Pressure

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Three screwsBoxwoodStrainBrass metal frameOpening ofthe tubeIvory pointerThick paperBeakerBoxwoodFigure 5.17 Filtering mercuryGlass cylinderFigure 5.16 Parts of mercurycistern glass cylinder(b)Latch holdingscrew(A) Graduationprotective glass tube(a)Glass catch ringholding screwFigure 5.18 Protective glass tubeATTACHED TABLETool and supplies for disassembly and cleaning of a mercury barometerNumber of tools orTools or suppliesPurposessupplies23
Repair frame 1 set Set a upside-down barometerBeaker 4 Pour mercury from a barometerMercury strainerRough and fine eachoneFilter mercury of a barometerSquirt 1 Syringe mercury into a beakerTweezers A pair Pinch the gasketCutter 1 Scrape off excess dirt of a glass cylinderDrier 1 Heat a barometer tube to prevent air bubbles enterinto itSoft brush and cloth Each one Clean metal and glass parts of a barometerTool of adjusting3-screws1 Attach 3-screws to original positionsDust pan 1 Pick up splashed mercuryPolyethylene pat 1 Set under the repair frame and gather leakagemercuryWell-dried Iron wire 1 Pull air bubbles out by inserting into glass tubeAlcohol 500 cc Wipe glass cylinder with moistened paperToothbrushtoothpasteCleaning paper(no fluff)Cross grained paper(thick paper)and1 Polish surface glass cylinder100 sheets Wipe glass cylinder, ivory pointer, etc.1 sheet Support strainer and cover beakerPolyethylene bag 10 sheets Store dustRefined mercury 2 kg Add into mercury cistern in the case ofrequiredLeathergaskets(attachedglass cylinder)the2 sheets SpareGaskets (attached thewash-leather bag)1 sheet Spare24
Page 3: (4) Disassemble the mercury cistern
Page 6 and 7: while the barometer is set on the h
Page 10 and 11: CylindercaseVacuumDetectingelements
Page 12 and 13: ln P 0P1Rz gdz0 T Vwhere:T v is the
Page 14 and 15: approximately 0.1 hPa in the pressu
Page 16 and 17: arometers and the mercury barometer
Page 18 and 19: 5.6.2 Aneroid InstrumentsGenerally,
Page 20 and 21: (2) Pre-install adjustmentDo not ca
Page 22 and 23: the gasket with a pair of tweezers
Page 24 and 25: clearance enough to rattle, allowin

Chapter 5 Measurement of Atmospheric Pressure

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