Fluke 2470 specifications Temp. Coef. x actual temperature expected temperature, For English Units

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RUSKA 2470

Users Manual

All of the calculations will be performed to this expected temperature ( t ). A final trim would be calculated to adjust the piston gauge to the temperature of the piston at the time of the actual measurement. This correction is calculated in the last column of the worksheet. This column represents the number of grams to be added to the stack of masses for a difference in the actual temperature from the expected temperature, ( t ). The final trim is computed using the following formula and loaded onto the piston gauge;

“Temp. Coef.” x (actual temperature – expected temperature)”

C.The Symbol Ao(t ) represents the effective area of the piston and its cylinder at atmospheric pressure, when operating at temperature ( t ); it is obtained from the relation

Ao(t ) = Ao(23) (1 + c Δt)

where:

Ao(23) = reported area of the piston at 23 degrees Celsius

c= thermal coefficient of superficial expansion

Δt = ( t 23)

D.Gravity and Buoyancy Correction: When the masses are applied to the piston in the presence of the buoyant atmosphere, buoyancy corrections are necessary and are combined with gravity corrections. For convenience, the combined correction K1 (or K2) is applied as a multiplier with the result indicating the quantity of apparent mass that is required to produce the desired force (F) on the piston.

For English Units

 

 

K1 = (gs / g1 ) [ ρ am /(ρ am ρ air )]

where:

 

 

gs

=

acceleration due to standard gravity, 980.665 cm/sec2

g

=

acceleration due to local gravity in cm/sec2

1

 

 

ρ air

=

density of air in g/cm3; see Equation A-4

ρ am

=

density of apparent mass;

 

 

for Apparent Mass versus Brass, 8.4 g/cm3

 

 

for Apparent Mass versus Stainless Steel, 8.0 g/cm3

When selecting masses from the calibration report, assure that the values selected are in the same Apparent Mass unit of measure that was used to calculate the K1 or K2 values.

The apparent mass (Column 9) is obtained from:

M A = F K1

where:

M A = apparent mass; record in Column 9

F= force required on piston; as found in Column 8

K1 =

multiplier which was determined by previous equation

A-2

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Contents Ruska Limited Warranty and Limitation of Liability Table of Contents Appendices List of Tables Ruska List of Figures Ruska How to Contact Fluke Safety InformationIntroduction Compressed GasSymbols Used in this Manual Heavy WeightsLubricants and Seals Oxygen CompatibilitySpecifications Low Range PistonAccuracy Humidity RangeGeneral Piston Pressure Gauge Considerations Types of Piston Pressure GaugesControlled Clearance Cylinder Calculations Measurement of Pressure with the Piston Pressure GaugeElastic Distortion of the Cylinder GravityBuoyant Effect of the Air Temperature Reference Plane of MeasurementsReference Plane Determination Is the density of the test media Crossfloating BibliographyGeneral Piston Pressure Gauge Considerations Ruska Description General InformationDescription of the Mass Set Description of the Gauge BaseDescription Ruska Installation IntroductionAlways remove the thermometer before shipping the gauge base Installation Ruska Precautions OperationLow Range Piston Assembly GeneralOperation 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 High Range Piston Assembly 11. Retaining Nut and Bearing12. Section View, High Range Piston/Cylinder 13. Parts Required for High Range Piston Operation Establishing Pressure Gauge PressuresAutomating the Calculations and Data Storage 16. Float PositionMaintenance of the Gauge LeaksRuska Piston / Cylinder Cleaning Instructions General Information and PreparationFunctional Testing of Piston/Cylinder Assemblies Cleaning the Low Range Piston/Cylinder AssemblyPiston / Cylinder Cleaning Instructions Preparations for Cleaning the Low Range Cylinder Preparing the Low Range Cleaning Tool Step Materials for Cleaning the Mid Range Piston/Cylinder Mid Range Piston/CylinderPreparing the Mid Range Cleaning Tool Cleaning the High Range Piston/Cylinder Assembly Materials for Cleaning the High Range Piston CylinderCleaning 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 Temp. Coef. x actual temperature expected temperature For English UnitsK2 = 1/ g1 1 − ρa / ρb For SI UnitsAe t Explanation of Pressure Calculation Worksheet a Ruska Date Ruska Expected Temperature, t Ruska Equation A-4 Air Density Equation A-4 Air DensityNitrogen Density English Units 0 to 1000 Psig Nitrogen Density English Units 1,000 to 15,000 PsigNitrogen Density SI Units 0 to 6.9 MPa Nitrogen Density SI Units 6.9 MPa to 100 MPaZero Air Density SI Units 0 MPa to 20.7 MPa Helium Density SI Units 0 to 6.9 MPaConversion Factors Table B-1. Conversion Factors To Convert From Multiply ByRuska Glossary GlossaryDUT +INF, -INF Pressure Factor Sink Rate Ruska

2470 specifications

The Fluke 2470 is a versatile and highly regarded data acquisition system designed for a wide range of applications in electrical testing and measurement. Known for its precision and reliability, the Fluke 2470 is particularly popular among professionals who require accurate data for analysis and reporting.

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