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Fluke Calibration P3031 User Manual

Pneumatic deadweight tester
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P3031 & P3032
Pneumatic Deadweight Tester
Users Manual
PN 3963385
November
© 2010 Fluke Corporation. All rights reserved. Printed in USA. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

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  • Page 1 P3031 & P3032 Pneumatic Deadweight Tester Users Manual PN 3963385 November © 2010 Fluke Corporation. All rights reserved. Printed in USA. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2 LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days.

  • Page 3: Table Of Contents

    Table of Contents Chapter Title Page General Information ................1-1 Introduction......................1-1 How to Contact Fluke ..................1-1 Safety Information ..................... 1-1 Safety Summary .................... 1-1 Compressed Gas .................... 1-2 Heavy Weights ....................1-2 Personal Protective Equipment..............1-2 Symbols Used in this Manual ................1-2 Operating Principle ....................
  • Page 4 P3031 & P3032 Users Manual Introduction......................5-1 PCU Assembly....................5-1 Piston Disassembly..................5-1 Piston Cleaning....................5-1 Piston Reassembly..................5-2 Replacement PCU Assembly ................ 5-2 Draining PCU Fluid ................... 5-3 Top Plate Removal..................... 5-5 Screw Press ......................5-6 Fault Finding ..................6-1 Poor PCU Spin/Sensitivity.................
  • Page 5 List of Tables Table Title Page 1-1. Symbols........................1-2 1-2. Temperature and Humidity Ranges for the DWT ..........1-3 2-1. Test Port Insert - Parts List..................2-5 5-1. PCU Assembly - Parts List..................5-3 5-2. PCU Housing Assembly - Parts List ..............5-5 5-3.
  • Page 6 P3031 & P3032 Users Manual...
  • Page 7 List of Figures Figure Title Page 2-1. Screw on Gauge Adapter..................2-2 2-2. Making Pressure Connections................2-3 2-3. Do Not Over-Tighten ..................... 2-3 2-4. Adjust Gauge Position.................... 2-3 2-5. Tighten Gauge......................2-4 2-6. Do Not Over-Tighten ..................... 2-4 2-7. Test Port Insert ....................... 2-4 2-8.
  • Page 8 P3031 & P3032 Users Manual...

  • Page 9: General Information

    Chapter 1 General Information Introduction This manual covers the operation and maintenance of the P3031 and P3032 Pneumatic Deadweight Testers (DWT). How to Contact Fluke To order accessories, receive operating assistance, or get the location of the nearest Fluke distributor or Service Center, call: •...

  • Page 10: Compressed Gas

    P3031 & P3032 Users Manual Compressed Gas Use of compressed gas can create an environment of propelled foreign matter. Pressure system safety precautions apply to all ranges of pressure. Care must be taken during testing to ensure that all hydraulic connections are properly and tightly made prior to applying pressure.

  • Page 11: Operating & Storage Specification

    General Information Operating & Storage Specification The design of a Piston/Cylinder Unit (PCU) fitted to a deadweight tester allows for a very small clearance gap between the piston and cylinder. This is required to allow the gas to pass between the components, providing a lubricating film, and preventing metal-to-metal contact.

  • Page 12: Temperature And Air Density

    P3031 & P3032 Users Manual Temperature and Air Density Temperature and Air Density variations are less significant than gravity. Variations should be corrected for when maximum accuracy is required. Temperature variation example: Deadweight Tester calibrated temperature 20 °C Operating temperature 24 °C...

  • Page 13: Preparation

    Chapter 2 Preparation Preparation The deadweight tester must be set up on a level, stable workbench or similar surface. Level the tester using the four adjustable feet to the bubble level attached to the top plate. Connection to External Pressure Supply The connection port in the rear panel of the instrument is ¼...
  • Page 14 P3031 & P3032 Users Manual W Warning DO NOT use Teflon/PTFE tape on these connections, as this will prevent correct sealing. The Gauge Adapter sealing system is designed for hand-tight sealing up to 20,000 psi / 1,400 bar-wrenches or similar tools are not required — over tightening can cause damage to threads or sealing faces.
  • Page 15 Preparation Connections gmg02.bmp Figure 2-2. Making Pressure Connections gmg03.bmp Figure 2-3. Do Not Over-Tighten 3. To adjust the position to face forward, hold the gauge adapter and turn the instrument COUNTER-CLOCKWISE, so that it faces forward. gmg04.bmp Figure 2-4. Adjust Gauge Position 4.

  • Page 16: Test Port Insert

    P3031 & P3032 Users Manual gmg05.bmp Figure 2-5. Tighten Gauge gmg06.bmp Figure 2-6. Do Not Over-Tighten Test Port Insert For devices with 1/8 BSP or NPT mounting threads, the diameter of the thread is very close to the effective sealing diameter of the O-ring fitted to the test port.

  • Page 17: Pcu Priming

    Preparation PCU Priming Table 2-1. Test Port Insert - Parts List Item Description Part O Ring 3865142 Test Port Insert 3919892 O Ring 3883397 To calibrate panel-mounted gauges with pressure connections in the rear, use an Angle Adapter P5543, (see Chapter 8, Ancillary Equipment). PCU Priming If the instrument is to be primed for the first time after drainage for storage/transportation, the following points apply:...
  • Page 18 P3031 & P3032 Users Manual...

  • Page 19: Operation

    Chapter 3 Operation Introduction There is a monitor gauge fitted to the instrument top plate, to serve as a guide to the operator by indicating the approximate pressure in the system. 1. Ensure that both Inlet and Exhaust valves are closed. 2.
  • Page 20 P3031 & P3032 Users Manual Note At low pressures, the piston may require lifting manually to overcome the ‘stick’ due to surface tension of the film of fluid that will develop between the top of the cylinder and the underside of the weight carrier.

  • Page 21: Calibration In Different Pressure Units

    Chapter 4 Calibration in Different Pressure Units Introduction The deadweight tester can be used to calibrate in different pressure units in either of two methods: Conversion Weights A set of Conversion Weights can be supplied, marked in the required pressure unit, and adjusted to the correct mass for use with the existing piston(s).
  • Page 22 P3031 & P3032 Users Manual...

  • Page 23: Maintenance & Servicing

    Chapter 5 Maintenance & Servicing Introduction W Caution The piston / cylinder assembly is the most critical and sensitive part of the deadweight tester. To maintain accuracy, the piston must always slide freely in the cylinder, and the gas supply must remain clean and dry.

  • Page 24: Piston Reassembly

    P3031 & P3032 Users Manual 9. 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.

  • Page 25: Draining Pcu Fluid

    Maintenance & Servicing Draining PCU Fluid gmg11.eps Figure 5-1. PCU Assembly Table 5-1. PCU Assembly - Parts List Item Description Part Weight Carrier SPEC Set Screw 3910313 Cylinder SPEC Piston SPEC Cylinder Retainer 3919216 Draining PCU Fluid Note In order to prevent contamination of the pneumatic system, the PCU lubricating fluid must be drained from the PCU housing before commencing any maintenance procedures that involve moving the instrument from the horizontal position.
  • Page 26 P3031 & P3032 Users Manual 6. To ensure all fluid is removed, unscrew cylinder retainer, and remove PCU assembly. 7. Unscrew 6 screws, and remove cylinder holder. 8. Carefully wipe all traces of fluid from inside the PCU housing. 9. Ensure that there is no particulate contamination inside the housing, then replace cylinder holder and screws, ensuring that the o-ring is correctly re-fitted.

  • Page 27: Top Plate Removal

    Maintenance & Servicing Top Plate Removal Table 5-2. PCU Housing Assembly - Parts List Item Description Part O-ring 3867582 Screw 3910035 Cylinder Holder 3919202 O-ring 3867594 PCU Housing 3867582 Filler Plug 3919233 Drain Plug 3919233 O-ring 3867575 Top Plate Removal Note In order to perform maintenance procedures on the pneumatic system, the Top Plate Assembly must first be removed from the instrument case.

  • Page 28: Screw Press

    P3031 & P3032 Users Manual Screw Press 1. Unscrew the large union nut (just behind the inner hub) of the screw press assembly. 2. Withdraw the lead screw assembly from the barrel (5), taking care not to drop the rambler assembly (9).
  • Page 29 Maintenance & Servicing Screw Press gmg13.eps Figure 5-3. Screw Press Assembly Table 5-3. Screw Press Assembly - Parts List Item Description Part 3867771 Test Port 3921414 O-ring 3864922 Barrel Locknut 3921438 Barrel 3921450 Barrel Support 3921492 O-ring 3867566 Anti-Extrusion Ring 3919118 Rambler 3919129...
  • Page 30 P3031 & P3032 Users Manual...

  • Page 31: Fault Finding

    Chapter 6 Fault Finding Poor PCU Spin/Sensitivity General If the piston is not free, do not rotate, as damage may occur — dismantle and clean the assembly as described in Chapter 5, PCU Assembly. To check the freedom of the PCU, open the Exhaust valve and hold the weight carrier. Lift the piston vertically, gently up and down.
  • Page 32 P3031 & P3032 Users Manual...

  • Page 33: Storage & Transportation

    Chapter 7 Storage & Transportation Instrument — Storage 1. Shut-off external gas supply, and depressurize system by slowly opening both Inlet and Exhaust valves. 2. Disconnect external gas supply. 3. Refit instrument lid, ensuring that the hinges are correctly engaged, and secure with toggle clips at the sides.
  • Page 34 P3031 & P3032 Users Manual...

  • Page 35: Ancillary Equipment

    Chapter 8 Ancillary Equipment Dirt/Moisture Trap, P5532 If there is any doubt that the instrument to be tested is not internally clean, then the addition of the P5532 Dirt/Moisture Trap will protect the deadweight tester from contamination and possible damage. Any particles or moisture present within the DUT will fall and be trapped in the aluminum chamber, which can be periodically inspected by the operator.

  • Page 36: Angle Adapter, P5543

    P3031 & P3032 Users Manual Angle Adapter, P5543 To calibrate gauges with the pressure connection on the rear (e.g. panel-mount gauges) in their correct position, an angle adapter should be used. The angle adapter fits directly onto the test station, converting it through 90 degrees, allowing the standard adapters to be used.

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P3032

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