Fluke Calibration P3800 Series User Manual Download Page 19

 

Maintenance 

 

Replacement 

4

 

4-3 

W

 Caution 

Never touch the working surface of a clean piston with bare 

fingers — the natural oil in your skin can cause the piston and 

cylinder to stick. 

5.

 

Wipe excess fluid from the outside surfaces of the cylinder. 

6.

 

Roll a NEW tissue into a tapered rod of appropriate size. Force the tissue through the 

cylinder bore whilst rotating. Ensure that the tissue is a tight fit inside the bore so that 

dirt and contamination is removed. 

7.

 

Repeat the above step, using a NEW tissue, but from the opposite end of the cylinder. 

8.

 

Immerse the cylinder in a suitable, clean solvent, then, using NEW tissues, repeat the 

cleaning procedure with the tapered tissue rolls. 

Replacement 

1.

 

Ensure that the O Ring is clean and undamaged, and that it is fitted correctly in the 

top of the PCU Column. 

2.

 

Place cylinder on top of the PCU Column, with the reduced diameter at the top, 

secure with Piston Nut A. 

3.

 

Hold 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 Cylinder — ensuring 

that it is held VERTICALLY, and push gently through. 

W

 Caution 

Never force the piston into its cylinder or damage will result.  

5.

 

If resistance is felt, introduce more fluid. If resistance continues, re-clean piston, 

cylinder or both. If, after repeated cleaning, the piston still will not slide freely within 

the cylinder, then permanent damage may have occurred. In which case, the parts 

should be returned to the factory for evaluation or replacement. 

6.

 

Screw Piston Nut B onto Nut A to retain the Piston. 

7.

 

Carefully replace Weight Carrier Tube Assembly, ensuring that the central hole in the 

top locates correctly on the top of the Piston. 

 
 

1.800.561.8187

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Summary of Contents for P3800 Series

Page 1: ...reserved 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...

Page 2: ...btain warranty 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...

Page 3: ...3 1 Connections 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...

Page 4: ...iii List of Tables Table Title Page 1 1 Symbols 1 2 1 800 561 8187 information ITM com Fluke Direct ca...

Page 5: ...3 Remove 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 P...

Page 6: ...which is 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 w...

Page 7: ...y high 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...

Page 8: ...ematic 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 Hydr...

Page 9: ...ngly Fluid 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 wit...

Page 10: ...rovided 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...

Page 11: ...ies Users 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 1 800 561 8187 information ITM com Fluke D...

Page 12: ...Turn capstan 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...

Page 13: ...alve 2 by 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...

Page 14: ...em Pressure 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 pri...

Page 15: ...e weights 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 dire...

Page 16: ...ximately 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 reservo...

Page 17: ...inspection 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 of...

Page 18: ...orth along 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...

Page 19: ...t A 3 Hold 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 ru...

Page 20: ...n ts DO 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 re...

Page 21: ...system 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 loc...

Page 22: ...WT calibrated 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 gravitation...

Page 23: ...e of the 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 10...

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