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BALUN BL506 User Manual

Vacuum deadweight tester
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User Manual
Model BL506 Vacuum Deadweight Tester

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  • Page 1 User Manual Model BL506 Vacuum Deadweight Tester...
  • Page 2 Dear Customer, We are delighted that you have decided to buy a BL506 vacuum deadweight tester. Please read these operating instructions for the BL506 vacuum deadweight tester carefully before connecting and configuring it, and operate the device in compliance with the instructions. Operational safety...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. INTRODUCTION ..............................1 2. SPECIFICATION ..............................4 3. SAFETY REQUIREMENTS ..........................9 4. SETTING UP THE DEAD WEIGHT TESTER ...................... 11 5. OPERATION ..............................16 5.1 PREPATATION ............................16 5.2 VACUUM CALIBRATION OPERATION......................16 PRESSURE CALIBRATION OPERATION ....................21 6.

  • Page 4: Introduction

    1. INTRODUCTION 1.1 DESCRIPTION With high precision accuracy, the BL506 vacuum deadweight tester have dual vacuum and pressure modes. Pressure and vacuum application can be operated by hand pump or external gas supply. To guarantee an excellent metrology-logic characteristics, all pistons and cylinders are made of tungsten carbide. Because of the extreme hardness of this material, the pressure distortion (expansion) coefficient is negligible.
  • Page 5 1.3 DETERMINE OF THE PRESSURE The reference level of the deadweight tester is at the top of the sealing of the pressure connection. If the weight set is marked with a pressure unit (MPa; bar; psi or kg/cm²) the pressure can be determined by the formula: m·g(1 －...
  • Page 6 The piston cylinder assembly is the heart of the dead weight tester and responsible for its high accuracy. We manufactures piston cylinder with accuracies from 0.05% up to 0.005% of reading. To give an idea of the manufacturing skills, the space between the piston and the cylinder is in the um range and can only be measured in a climate room. To guarantee an excellent metrology-logic characteristics, all pistons and cylinders are made of tungsten carbide.

  • Page 7: Specification

    2. SPECIFICATION 2.1 GENERAL SPECIFICATION  Accuracy: 0.05%rdg, 0.02%rdg, 0.01%rdg, 0.005%rdg  Piston and cylinder material: Tungsten carbide  Mass material: 304SS (Forged 316 stainless steel is optional)  Tester base and pump material: Stainless Steel  Medium: Dry and clean air, or nitrogen ...
  • Page 8 2.3 MASS QUANTITY AND MEASURING RANGE Piston Part # Pressure Pressure measure range and Mass Quantity & Bell Pressure -10kPa -5kPa 5kPa 10kPa KYQZ100 (-100~100)kPa 5kPa Pieces Pressure -10kPa -5kPa 5kPa 10kPa 20kPa KYQZ160 (-100~160)kPa 5kPa Pieces Pressure -10kPa -5kPa 5kPa 10kPa 20kPa...
  • Page 9 2.4 SCOPE OF DELIVERY Page 6...
  • Page 10 2.5 INSTRUMENT OUTLINE FOR VACUUM DEADWEIGHT TESTER BASE Page 7...
  • Page 11 2.6 INSTRUMENT OUTLINE FOR MANUAL PUMP Page 8...

  • Page 12: Safety Requirements

    3. SAFETY REQUIREMENTS WARNINGS:  Do not attempt to substitute common pipe fittings in place of original high pressure fittings used in the plumbing systems on these instruments. Common pipe fittings are not rated for high operating pressure used in these instruments, and the use of such fittings will void the warranty and may create a potentially dangerous condition.
  • Page 13 CAUTIONS:  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 connections are properly and tightly made prior to applying pressure. Personnel must wear eye protection to prevent injury. ...

  • Page 14: Setting Up The Dead Weight Tester

    4. SETTING UP THE DEAD WEIGHT TESTER 4.1 Put the Vacuum deadweight tester base, piston cylinder unit and the manual pressure pump on a firm level base, make the bubble level in the middle position by adjusting the three bottom feet of vacuum deadweight tester. 4.2 Remove the bell jar from the vacuum deadweight tester base, check whether the sealing ring in the groove.
  • Page 15 4.3 Hold the “big head” of piston and cylinder unit, carefully take out it from the vacuum base upside direction. DO NOT USE YOUR FINGER TO TOUCH THE PISTON SUFACE! The natural dermal grease can cause a jamming of the piston cylinder system.
  • Page 16 4.4 Gently pull out the cylinder from the piston cylinder unit. DO NOT USE YOUR FINGERS TO TOUCH THE PISTON SURFACE. The natural dermal grease can cause a jamming of the piston cylinder system. 4.5 Put the cylinder into the base with the lettered end facing up (as following left picture), hand tight the knurled pressure cap to the mechanical stop on the outside of the cylinder (as following right picture) Page 13...
  • Page 17 4.6 Loosen the three bottom dowel screws, way out 2/3 thread length around. 4.7 Holding the piston by the larger “head” end, carefully introduce the piston into the underside of the cylinder, and push gently through (as following left picture). Never force the piston into its cylinder or damage will result. Fully tight and three bottom dowel screws (as following right picture).
  • Page 18 4.8 Connect the positive pressure port, negative port with flexible connection hose between vacuum deadweight base and manual pressure pump (as following left picture). Connect the electric vacuum pump with manual hand pump with flexible connection hose (as following right picture). Page 15...

  • Page 19: Operation

    5. OPERATION 5.1 PREPATATION  Place the instrument on a firm level base. The deadweight tester should be placed on a rugged table which is rated for at least 140 kg without deforming. The table should be horizontally leveled.  The room or onsite place in which the instrument is placed should have proper founding, no vibrations are allowed during operation of the deadweight tester as this results in unpredictable errors.
  • Page 20  Step 2: Remove the bell jar from the vacuum deadweight tester base, check whether the sealing ring is in the groove. Make sure it is not aged or broken. If not, please replace it with new one.  Step 3: Carefully take out the piston cylinder unit from the vacuum base, put it on the table carefully. DO NOT USE YOUR FINGER TO TOUCH THE PISTON SUFACE! Page 17...
  • Page 21  Step 4: Screw out the piston protection tube (left direction is to loose) and put it on the table.  Step 5: Place the piston vertically and carefully. DO NOT USE YOUR FINGER TO TOUCH THE PISTON SUFACE! The natural dermal grease can cause a jamming of the piston cylinder system. Page 18...
  • Page 22  Step 6: Use a flexible hose to connect the negative port on the vacuum deadweight tester to the manual pressure pump. Push the pressure / vacuum switch inside on the manual pressure pump. Put the bell jar on the base. ...
  • Page 23  Step 8: Use priming pump to apply vacuum till the piston goes up, hand rotates the piston clockwise direction.  Step 9: Use wheel pressure regulator to fine adjust the desired vacuum, make sure the piston is between the two piston position mark lines on the bell jar.

  • Page 24: Pressure Calibration Operation

     Step 15: Above operation is for up process of vacuum calibration. For down process of vacuum calibration, firstly take off some calculated weights, close the isolation valve of EVP, close the shut off valve, and open the vent valve to release the air slowly. Quickly close the vent valve if the vacuum to close the desired value. Use wheel pressure regulator to fine adjust the desired vacuum, rotate the piston to make sure its position is in the range of two mark lines on the bell jar, records the measuring value.
  • Page 25  Step 4: Carefully take out the piston from the cylinder, put it on the table slightly. DO NOT USE YOUR FINGER TO TOUCH THE PISTON SUFACE! The natural dermal grease can cause a jamming of the piston cylinder system. But user can touch the thin pole when the piston is needed to rotate or handle. ...
  • Page 26  Step 6: Place the piston into the cylinder vertically and carefully, the screw in the 3 bottom dowel screws tightly. Pull the piston up and down to check if the piston is limited the moving distance by piston protection tube. ...
  • Page 27  Step 8: Use priming pump to apply pressure till the piston goes up, hand rotates the piston clockwise direction. Use wheel pressure regulator to fine adjust the desired pressure, make sure the piston position is not ahead of the marked step on the pressure cap. ...

  • Page 28: Maintenance

    6. MAINTENANCE 6.1 PISTON DISASSEMBLY 1. 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. 2.

  • Page 29: Piston Re-Assembly

    6.3 PISTON RE-ASSEMBLY 1. Holding the piston by the larger “head” end, carefully introduce the piston into the underside of the cylinder, and push gently through (the piston will normally slide freely through due to its own weight). Never force the piston into its cylinder or damage will result.

  • Page 30: Troubleshooting

    7. TROUBLESHOOTING Poor PCU Spin/Sensitivity  The clean pneumatic piston/weight carrier assembly will rotate freely, without additional weights, slowing down gradually to a complete stop. If the rotation stops quickly, then the PCU may be dirty and require cleaning. If the piston “squeaks”...
  • Page 31 3. Ensure that the sealing face of the device under test (DUT) is not dented or scratched, and is correctly contacting the seal in the test port. 4. Ensure that the external supply is correctly connected and functioning correctly. 5. Ensure that the pressure vacuum selector valve(s) are correctly positioned (if fitted). 6.

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