Fluke 2470 specifications K2 = 1/ g1 1 − ρa / ρb, For SI Units

Page 61

 

 

Explanation of "Pressure Calculation Worksheet"

A

 

 

Introduction

For SI Units:

 

K2 = 1/ [g1 (1 − ρa / ρb )]

 

 

 

 

where:

 

 

 

g

=

acceleration due to local gravity in m/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 K2

where:

 

M A =

apparent mass versus brass; record in Column 9

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

K2 =

multiplier which was obtained by previous equation

When the masses are applied to the piston in an evacuated bell jar, the above equations for K1 and K2 can still be used. In this situation, the density of air ( ρ air ) will be zero which will cause

the buoyancy portion of the equation to become 1. Also, the results will indicate the quantity of true mass (not apparent mass) that must be applied to the piston.

E.Column 1, PB , is the desired pressure at the reference plane of the device being calibrated.

F.Column 2 is the mass density of the pressure medium being used in the piston pressure gauge system. For hydraulic piston pressure gauges, this number can be considered constant for all pressures. RUSKA Instrument has two types of hydraulic piston fluids available. One is a Spinesstic 22™ part number 55-500 which has a density of 0.031 pounds per cubic inch (858 kilograms per cubic meter). The other is a Dioctyl Sebacate (DOS) part number

55-521-1 which has a density of 0.033 pounds per cubic inch (913 kilograms per cubic meter). For gas medium piston gauges, the values in Column 2 will be different for different system pressures. Equations are provided to calculate the density of air or nitrogen as a function of the system pressure.

G.Column 3 is required to adjust the mass density of the pressure medium for local gravity. It is also used to correct the pressure head that exist between the reference ports of the piston gauge and device under test.

H.Column 4, PH , is the pressure correction that is required if the reference plane of the device being calibrated is not the same plane as the reference plane of the piston pressure gauge. The difference between the two planes, h, is positive if the reference plane of the device being calibrated is higher than the reference plane of the piston pressure gauge.

A-3

Page 60 Page 62
Image 61
Page 60 Page 62
Contents Ruska Limited Warranty and Limitation of Liability Table of Contents Appendices List of Tables Ruska List of Figures Ruska Safety Information How to Contact FlukeIntroduction Compressed GasHeavy Weights Symbols Used in this ManualLubricants and Seals Oxygen CompatibilityLow Range Piston SpecificationsHumidity Range AccuracyTypes of Piston Pressure Gauges General Piston Pressure Gauge ConsiderationsControlled Clearance Cylinder Measurement of Pressure with the Piston Pressure Gauge CalculationsGravity Elastic Distortion of the CylinderBuoyant 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 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 6.9 MPa to 100 MPa Nitrogen Density SI Units 0 to 6.9 MPaZero Air Density SI Units 0 MPa to 20.7 MPa Helium Density SI Units 0 to 6.9 MPaTable B-1. Conversion Factors To Convert From Multiply By Conversion FactorsRuska 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.

One of the standout features of the Fluke 2470 is its high-performance data acquisition capabilities. It supports multiple channel inputs, allowing users to monitor and log various electrical parameters simultaneously. This multi-channel functionality is essential for complex testing scenarios where multiple variables must be tracked in real time.

The Fluke 2470 utilizes advanced measurement technologies, including a high-resolution analog-to-digital converter that ensures superior measurement accuracy. This technology is crucial for applications that demand precise readings, such as research and development, quality assurance, and compliance testing.

Additionally, the device is equipped with a variety of input types, including voltage, current, and temperature, making it suitable for a wide array of testing applications. The flexibility in input compatibility allows users to customize their measurements according to specific project requirements.

Another significant characteristic of the Fluke 2470 is its user-friendly interface and software integration. The accompanying software enables users to configure measurements easily, set up logging intervals, and analyze data visually. This intuitive setup minimizes the learning curve for new users and enhances productivity.

Data storage is another critical feature of the Fluke 2470. It provides ample internal memory, allowing users to record extensive datasets over long periods without the need for continuous monitoring. The stored data can be easily exported for further analysis, making it ideal for long-term testing projects.

Moreover, the Fluke 2470 excels in terms of portability and ruggedness. Its compact design is built to withstand demanding environments, ensuring that it can deliver accurate data in the field just as reliably as in the lab.

In conclusion, the Fluke 2470 combines high-performance data acquisition, multi-channel capabilities, advanced measurement technologies, and user-friendly features, making it a top choice for professionals in a variety of fields. Its robust design ensures that it meets the demands of rigorous testing while providing accurate and reliable data, crucial for informed decision-making.
Top Page Image Contents