Fluke 2470 specifications Explanation of Pressure Calculation Worksheet a

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Explanation of "Pressure Calculation Worksheet" A

Introduction

O.Column 11, the remainder from Column 10, is the mass that must be placed on the piston pressure gauge to complete the mass needed to set the desired pressure. This "remainder", recorded in Column 11, is realized with the Trim Mass set provided with all RUSKA Mass Sets. The RUSKA supplied Trim Mass Sets are defined as Class 3, Type 1 (per ASTM E617, formerly Class S1 per NBS Cir. 547).

These fractional masses should also be used to adjust the mass load for piston pressure gauge operating temperatures that differ from the expected temperature (t). These fractional masses could also be used to adjust the mass load for the piston pressure gauge if the reference plane of the device being calibrated is at a different elevation than planned in the original head correction.

P.In the English system, the remainder can be recorded in pounds in Column 11, and in grams in Column 12. The conversion factor to convert pound mass to grams is 453.59237 g/lbm.

Q.Column 13 is used to calculate a temperature coefficient. This temperature coefficient is used to correct for any piston temperature variation from the expected temperature value that was used to calculate the mass loads for the various pressure points in the worksheet. See item B above.

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Contents Ruska Limited Warranty and Limitation of Liability Table of Contents Appendices List of Tables Ruska List of Figures Ruska Compressed Gas How to Contact FlukeSafety Information IntroductionOxygen Compatibility Symbols Used in this ManualHeavy Weights Lubricants and SealsLow Range Piston SpecificationsHumidity Range AccuracyTypes of Piston Pressure Gauges General Piston Pressure Gauge ConsiderationsControlled Clearance Cylinder Measurement of Pressure with the Piston Pressure Gauge CalculationsElastic Distortion of the Cylinder GravityBuoyant Effect of the Air Reference Plane of Measurements TemperatureReference Plane Determination Is the density of the test media Bibliography CrossfloatingGeneral Piston Pressure Gauge Considerations Ruska General Information DescriptionDescription of the Gauge Base Description of the Mass SetDescription Ruska Introduction InstallationAlways remove the thermometer before shipping the gauge base Installation Ruska Operation PrecautionsGeneral Low Range Piston AssemblyOperation 24-580 Bearing 2460-4-25 2460-5-6 Handling the Low Range Piston and Cylinder Step Low Range Piston and Cylinder Showing O-Ring Groove Mid Range Piston Assembly Section View, Mid Range Piston/Cylinder Thrust Cylinder Assembly Spacer Bearing 2460-70-2 2460-70-3 11. Retaining Nut and Bearing High Range Piston Assembly12. Section View, High Range Piston/Cylinder 13. Parts Required for High Range Piston Operation Gauge Pressures Establishing Pressure16. Float Position Automating the Calculations and Data StorageLeaks Maintenance of the GaugeRuska General Information and Preparation Piston / Cylinder Cleaning InstructionsCleaning the Low Range Piston/Cylinder Assembly Functional Testing of Piston/Cylinder AssembliesPiston / Cylinder Cleaning Instructions Preparations for Cleaning the Low Range Cylinder Preparing the Low Range Cleaning Tool Step Mid Range Piston/Cylinder Materials for Cleaning the Mid Range Piston/CylinderPreparing the Mid Range Cleaning Tool Materials for Cleaning the High Range Piston Cylinder Cleaning the High Range Piston/Cylinder AssemblyCleaning the High Range Piston/Cylinder Assembly Gmq33.bmp 13. Cleaning the High Range Cylinder 14. Drying the High Range Cylinder Explanation of Pressure Calculation Worksheet For English Units Temp. Coef. x actual temperature expected temperatureFor SI Units K2 = 1/ g1 1 − ρa / ρbAe t Explanation of Pressure Calculation Worksheet a Ruska Date Ruska Expected Temperature, t Ruska Nitrogen Density English Units 1,000 to 15,000 Psig Equation A-4 Air DensityEquation A-4 Air Density Nitrogen Density English Units 0 to 1000 PsigHelium Density SI Units 0 to 6.9 MPa Nitrogen Density SI Units 0 to 6.9 MPaNitrogen Density SI Units 6.9 MPa to 100 MPa Zero Air Density SI Units 0 MPa to 20.7 MPaTable B-1. Conversion Factors To Convert From Multiply By Conversion FactorsRuska Glossary GlossaryDUT +INF, -INF Pressure Factor Sink Rate Ruska

2470 specifications

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