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BALUN BL510 User Manual

Portable deadweight tester
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User Manual
Model BL510 Portable Deadweight Tester

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Summary of Contents for BALUN BL510

  • Page 1 User Manual Model BL510 Portable Deadweight Tester...
  • Page 2 Dear Customer, We are delighted that you have decided to buy a BL510 portable deadweight tester. Please read these operating instructions for the BL510 portable 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 ..............................5 3. SAFETY REQUIREMENTS ..........................8 SETTING UP THE DEADWEIGHT TESTER ....................10 OPERATING THE DEADWEIGHT TESTER ....................12 5.1 Preparation ..............................12 5.2 Pressure Transforming Media........................12 5.3 Operation ..............................12 MAINTENANCE ............................14 6.1 Cleaning and service tips ..........................

  • Page 4: Introduction

    1.1 General Description The model BL510 portable deadweight tester provide a precise means for generating pressure with high accuracy that can be used as a primary calibration standard. The unit's built-in shuttle valve provides the means to control the rate of pressure increase, while precision adjustment is accomplished with an integral micro vernier displacement valve.
  • Page 5 In formula: P=F/A Where:  P = the pressure being derived  F = the force applied by the weights  A = the effective area of the piston cylinder 1.4 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;...
  • Page 6  ρ : Mass density, ρ value of stainless steel =7.93x10³kg/m , ρ value of carbon steel =7.8x10 kg/m , ρ value of Aluminum =2.7 x10³kg/m  So: effective area at zero pressure (m²) @ t=20℃  Po: This is pressure value when piston module doesn’t be deformed, can be instead by P, (MPa) ...
  • Page 7 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 8: Specification

    2. SPECIFICATION 2.1 General Specification  Accuracy: ±0.05% of reading  Engineering units: MPa, bar, psi, kg/cm2  Piston & cylinder material: Tungsten carbide  Increment mass set material: Carbon steel, 304 Stainless Steel (optional)  Sealing ring material: Buna-N ...
  • Page 9 2.2 Pressure range selectable sheet Part Number Pressure Range Effective Area Mass Set KY0.6 (0.04~0.6)MPa 0.1MPa/kg 1 cm 6 kg (0.04~1)MPa 0.1MPa/kg 1 cm 10 kg (0.1~6)MPa 0.5MPa/kg 0.2 cm 12 kg KY25 (0.5~25)MPa 1MPa/kg 0.1 cm 25 kg KY60 (1~60)MPa 2MPa/kg 0.05 cm...
  • Page 10 2.4 Instrument Outline Remark: No priming hand pump and Float indicator for low pressure ranges (≤25MPa) Page 7...

  • Page 11: 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 12 CAUTIONS:  If the test fluid or gas (oxygen) will be reactive with the oil in the tester's reservoir, testing must be performed with an instrument supplied with synthetic oil. Before hydraulic oil is replaced, the tester must be thoroughly cleaned, and the seals should be replaced to insure proper cleaning.

  • Page 13: Setting Up The Deadweight Tester

    BL510 portable deadweight tester as this results in unpredictable errors.  The BL510 portable 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.
  • Page 14 4.2 Assembly the piston cylinder unit Marking line for floating position (±10mm)  As above picture, loose the bottom safety screw of piston cylinder unit.  Check if the O-ring located in the center position of cylinder base the deadweight tester. ...

  • Page 15: Operating The Deadweight Tester

    5. OPERATING THE DEADWEIGHT TESTER 5.1 Preparation  Place the instrument on a firm level base.  Check if the bubble level is in the center; if not, level the instrument with the 4 adjustable feet. 5.2 Pressure Transforming Media ...
  • Page 16 4. Apply the pressure with priming hand pump up and down, till the strength through the hand pump level is felt hard, close the vent valve (oil drain valve). 5. Put the mass on the mass plate carrier, manually rotate the table clock wisely, the rotate speed is about (30~60) r/min.

  • Page 17: Maintenance

    6. MAINTENANCE 6.1 Cleaning and service tips 1. The O-rings on the cylinder base and connector, is easy to broken, please change it timely. 2. Do not open the piston and cylinder unit by unprofessional people. 3. Firmly tighten the knurled nut on the weight rod before transport to avoid abrasion of the weights and loss of their mass.

  • Page 18: Maintenance Schedule

     Corrosive contaminants in the oil may damage the piston and cylinder assembly.  Fill the oil reservoir through the filler cap with mineral oil or sebacate (≥25MPa) before an instrument is used for the first time. The oil level must be maintained above the lower end of the cylinder, or the gas will bypass the oil.

  • Page 19: Troubleshiooting

    7. TROUBLESHIOOTING Gas escapes past piston when used to determine unknown gas pressure.  Insufficient oil in Reservoir Adapter. Shut off and bleed pressure from tester. Pump oil to adapter until reservoir is full.  Damaged Cylinder O-Ring. Unscrew the piston cylinder unit from cylinder base, replace O-Ring. ...
  • Page 20 Pressure cannot be maintained when calibrating another pressure gauge.  Air is drawn into pump because of insufficient oil in center reservoir. Unscrew Cap and check oil level in reservoir. Add oil if necessary.  Damaged cylinder adapter O-Ring. Unscrew the piston cylinder unit from cylinder base, replace O-Ring. ...

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