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List of Tables

Table Title Page

1-1. Symbols..................................................................................................................

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Содержание 095969588379

Страница 1: ...d Printed in USA Specifications are subject to change without notice All product names are trademarks of their respective companies P3800 Series High Pressure Hydraulic Deadweight Tester Users Manual www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Страница 2: ...arranty service contact your nearest Fluke authorized service center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no risk for damage in transit Following warranty repair the product will be returned to Buyer transportation prepaid FOB Destination If Fluke dete...

Страница 3: ...nections 3 1 Procedure for Removing Trapped Air from System 3 2 Procedure for Priming the Pressure Intensifier 3 4 Procedure for Generating System Pressure 3 5 Generating Calibration Pressure 3 6 4 Maintenance 4 1 Introduction 4 1 PCU Removal 4 1 Cleaning 4 2 Replacement 4 3 5 Recalibration 5 1 Introduction 5 1 Do s and Don ts 5 1 Don ts 5 1 Do s 5 1 6 Pressure Corrections 6 1 Introduction 6 1 www...

Страница 4: ...iii List of Tables Table Title Page 1 1 Symbols 1 2 www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Страница 5: ... Trapped Air 3 2 3 4 Turn Capstan Fully Clockwise 3 3 3 5 Prime the Pressure Intensifier 3 4 3 6 Generate System Pressure 3 5 3 7 Close Reserve Valve 3 6 3 8 5 Correct Float Position 3 7 4 1 Piston Cylinder Removal 4 2 6 1 Pressure Corrections 6 2 6 2 Nomogram for Finding the Value of 6 3 www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Страница 6: ...s mounted a high pressure manifold a piston cylinder unit PCU a test station to mount the equipment under test a fluid reservoir a ram screw pressure generating system a pressure intensifier which increases the pressure generated by a factor of 7 1 and a safety relief valve which protects both the low and high pressure systems from accidental overpressure The whole assembly is contained within a s...

Страница 7: ...Ensure that all connections are made correctly DO NOT CONNECT DWT TO EXTERNAL PRESSURE SOURCE Symbols Used in this Manual In this manual a Warning identifies conditions and actions that pose a hazard to the user A Caution identifies conditions and actions that may damage the Deadweight Tester DWT Symbols used on the Deadweight Tester DWT and in this manual are explained in Table 1 1 Table 1 1 Symb...

Страница 8: ...CAPSTAN RAM SCREW ASSEMBLY RELIEF VALVE RESERVOIR VALVE RESERVOIR FLUID LP VALVE HP VALVE 7 1 INTENSIFIER TEST STATION TO TAKE ITEM UNDER TEST PISTON CYLINDER ASSEMBLY glf01 eps Figure 1 1 Hydraulic Circuit Schematic www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Страница 9: ...id Filling Fill the fluid reservoir as follows Fully unscrew counter clockwise the reservoir valve screw 3 and remove it together with the spring and reservoir cover Place to one side Fill with the correct fluid to the top of the brass nut visible on the inside of the reservoir Fully wind out counter clockwise the capstan so that fluid is drawn into the DWT Refill the reservoir to the top of the b...

Страница 10: ... W Caution This unit can generate very high pressures and as a consequence only metal to metal sealing is acceptable i e no sealing washers of any description should be used see Figure 3 1 and 3 2 for methods of sealing glf02 eps Figure 3 1 Pressure Connection Method 1 www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Страница 11: ...rs Manual 3 2 glf03 eps Figure 3 2 Pressure Connection Method 2 Procedure for Removing Trapped Air from System glf04 bmp Figure 3 3 Remove Trapped Air www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Страница 12: ...stan fully out counter clockwise and wait for approximately 60 seconds glf05 bmp Figure 3 4 Turn Capstan Fully Clockwise 4 Turn capstan fully in clockwise and wait for approximately 15 seconds 5 Trapped air from the system will appear as bubbles in the reservoir 6 Repeat the procedure until no more air appears in the reservoir www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Страница 13: ...y turning fully clockwise 2 Turn capstan in clockwise until resistance is felt This is a result of the pressure required to move the intensifier piston backward in its cylinder and to lift the measuring piston and weight carrier 3 Some additional bubbles may appear in the reservoir www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Страница 14: ...ure TEST PORT INTENSIFIER RESERVOIR VALVE 3 LP VALVE 2 HP VALVE 1 CAPSTAN PCU glf07 eps Figure 3 6 Generate System Pressure 1 Close HP valve 1 2 Open LP valve 2 3 Turn capstan fully out to prime it with fluid from the reservoir www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

Страница 15: ...s onto the carrier one at a time ensuring correct location Generate pressure by winding the capstan in clockwise until the weight stack starts to rise Spin the weight stack in a clockwise direction at approximately 40 rpm by using the palms of the hands on opposite side of the stack Adjust the height of the weight stack winding the capstan in or out until the underside of the bottom weight lines u...

Страница 16: ... 700 psi 50 bar To release this pressure see note below Note To reduce pressure to zero wind the capstan fully out anticlockwise Open HP valve 1 SLOWLY and fully counter clockwise Open reservoir valve 3 four turns anticlockwise ADJUST FLOAT HEIGHT OF PISTON SO THAT THE UNDERSIDE OF THE BOTTOM WEIGHT LINES UP WITH THE MID FLOAT REFERENCE UPPER TRAVEL LIMIT LOWER TRAVEL LIMIT MID FLOAT POSITION glf0...

Страница 17: ...tion or cleaning great care must be taken whilst handling the components PCU Removal Before removal of the PCU the system pressure must be reduced to zero as described above 1 Carefully lift off Weight Carrier Tube Assembly 2 Unscrew Piston Nut B and lift out Piston take great care not to apply any side loads to the piston to avoid possible breakage 3 Unscrew Piston Nut A taking great care not to ...

Страница 18: ...ng its length 2 To remove all traces of contamination the piston can be cleaned in a suitable solvent W Caution O ring seals should not be immersed in solvents as they will become damaged They should be wiped carefully with a new tissue 3 After removal from the solvent using a NEW tissue repeat the cleaning procedure above 4 Place piston carefully on a NEW tissue where it will not be damaged while...

Страница 19: ...ld the Piston by the larger head end and dip the smaller working end into a container of CLEAN operating fluid Transfer this to the top of Piston Nut A and allow a few drops of the fluid to run through the bearing assembly and through the bore of the Cylinder Repeat this 3 or 4 times to ensure a good film of fluid in the Cylinder 4 CAREFULLY introduce the working end of the piston into the Cylinde...

Страница 20: ... NOT release high pressure using any of the valves ALWAYS use the Capstan to reduce high pressure before opening any valve DO NOT rotate the Weight Stack at its TOP or BOTTOM position DO NOT remove the GRP cover DO NOT transport with fluid in the system DO NOT allow fluid to fall below the recommended level Do s DO change the operating fluid at the first sign of contamination DO have the Deadweigh...

Страница 21: ...when the carrier is loaded with major and incremental weights From these values assuming effects are linear the incremental weight corrections over the range may be calculated If the DWT is located at a position where the values of the gravitational acceleration and temperature of the operation are the same as those values specified for calibration then the Actual Pressure is fully corrected If th...

Страница 22: ...ibrated gravitational acceleration The value of gravitational acceleration g varies with latitude height above sea level and geological conditions at the location of the DWT When the gravitational acceleration varies from that for which the DWT was calibrated the above correction must be made The local value of gravitational acceleration g can be obtained as follows Data from the appropriate geoph...

Страница 23: ... DWT when extended to scale g will indicate the approximate value of g L 85 80 75 65 90 60 50 70 45 30 20 35 40 55 5 25 15 0 10 9 765 9 78 9 80 9 77 9 82 9 79 9 83 9 81 g METRES 14000 12000 10000 8000 6000 4000 2000 0 FEET 0 H 16000 glf12 eps Figure 6 2 Nomogram for Finding the Value of g from Altitude and Latitude www calcert com sales calcert com 1 888 610 7664 0 5 10 15 20 25 30 ...

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