Descripción
| P3124-BAR Hydraulic Deadweight Tester Oil Operated – Dual PCU, Pressure Range 1 to 700 bar |
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| The P3100 Models are available in single or dual piston formats for increased operating ranges. Units can be supplied in psi, bar, kgf/cm², and MPa. These robust instruments are highly accurate, quick and easy to use. Units feature a built-in priming pump for large volume applications, piston flotation indicators and a high quality screw press for fine pressure control.
The P3100 Series is the culmination of over 50 years of experience in the production and design of high performance pressure standards. With features designed to improve accuracy and performance, increase reliability and simplify operation these deadweight testers can be used to calibrate virtually any pressure sensing device, including transducers, transmitters, gauges or pressure switches. The Pressurements 3000 Series is the culmination of over 50 years of experience in the production and design of primary pressure standards. With features designed to improve accuracy and performance, increase reliability and simplify operation these deadweight testers can be used to calibrate virtually any pressure sensing device, including transducers, transmitters, gauges or pressure switches. Each instrument is supplied with a detachable lid which makes it neat, compact and easily portable. The weight masses are stored in a high-quality case with a self locking mechanism to protect them during transit. |
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| All units are provided with a traceable certificate of accuracy, weight mass details, 1/8 inch, 1/4 inch, 3/8 inch and 1/2 inch NPT or BSP female adaptors, operating fluid (where applicable) and spare seals.
The piston/cylinder assemblies are manufactured to the very highest standards with certified accuracies traceable to international standards laboratories such as the National Institute of Standards and Technology (NIST). |
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| Operating principle Deadweight testers are the primary standard for pressure measurement. Utilizing the well proven piston-gauge system consisting of a vertically mounted, precision lapped piston and cylinder assembly, accurately calibrated weight masses (Force) are loaded on the piston (Area), which rises freely within its cylinder. These weights balance the upward force created by the pressure within the system. The pressure is measured when placed on a correctly spinning and floating piston. The total pressure measured is the summation of the weights plus the piston weight carrier assembly. |
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| Instrument base There are three basic variations in the hydraulic offering; single low pressure, single high pressure and dual piston models. Pressure is generated and controlled by means of a high quality screw press located on the front of the tester. A built-in hand pump is included as standard for all hydraulic models to prime The system and accommodate large volume requirements. |
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| Piston/cylinder assemblies The piston/cylinder assembly is the heart of each deadweight tester. They are manufactured from materials that provide stability, durability, and low thermal coefficients and distortion. Our experience and knowledge of piston/cylinder production and calibration ensure the precision and performance required for today’s demanding calibration requirements. |
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| Weight masses Standard weight masses are series 3 non-magnetic austenitic stainless steel types. Each mass is marked with the serial number of the instrument and the nominal pressure value relative to the high or low-pressure piston, when applicable. Optional fractional weights are stainless steel and/or solution heat treated aluminum. |
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| Gravity correction Gravity varies significantly with geographical location and this variation has a direct effect on the force of the weights and the accuracy of the deadweight tester. Each instrument can be trimmed to local gravity at no extra cost. If unspecified, instruments will be calibrated to Standard Gravity at 980.665 cm/s 2. |
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Options
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Manufacturer Specs
| Pressure ranges | |
| Oil operated | Ranges to 20 000 psi (1 400 bar) |
| Distilled water operated | Ranges to 10 000 psi (700 bar) |
| Accuracy | ± 0.015 % of reading (± 0.008 % optional) Note: Accuracy based on % of reading from 10 % to 100 % of the piston range when used in accordance with the corrections found on the calibration certificate. Below 10% ± (accuracy class) X 10 % of the piston range. |
| Materials of construction | |
| Standard weight material | Series 3 non-magnetic austenitic stainless steel Density: 7.8 g/cm 3 |
| Standard weight material | Series 3 non-magnetic austenitic stainless steel Density: 7.8 g/cm 3 |
| Optional fractional weights | Solution heat treated aluminum Density: 2.7 g/cm 3 |
| Piston material | Tungsten carbide with nickel binder Density: 15.0 g/cm 3 |
| Cylinder material | Hardened martensitic steel Tungsten carbide (water above 500 psi, 35 bar) |
| Thermal coefficients of expansion | Oil piston/cylinder 16.5 ppm/°C Water (above 500 psi, 35 bar) 11 ppm/°C |
| General | |
| Test port adaptors | M14 X 1.5, M20 X 1.5, 1/8 in, 1/4 in, 3/8 in and 1/2 in NPT and BSP |
| Weight | 16 kg (36 lb) |
| Dimensions (W x D x H) | 440 mm x 300 mm x 215 mm (17.5 in x 12 in x 8.5 in) |
| Mass set weight (typical) | 36 kg (80 lb) |
| Reservoir volume | 150 cm 3 (9.2 in 3 ) |
| Screw press displacement | 5.5 cm 3 (0.34 in 3 ) |
| Pump displacement | 4.7 cm 3 (0.29 in 3 ) per stroke |
| O-ring seal materials | Buna N as standard, Viton and EPDM available |
| Weight increments | |
| Minimum standard weight increments | |
| Up to 500 psi (35 bar) | 1 psi (0.1 bar) |
| 500 psi to 5 000 psi (35 bar to 350 bar) | 10 psi (1 bar) |
| 5 000 psi to 20 000 psi (350 bar to 1 400 bar) | 20 psi (2 bar) |
| Model P3112 | 1 psi (0.1 bar) |
| Optional fractional weights | |
| Up to 500 psi (35 bar) | 0.1 psi (0.01 bar) |
| 500 psi to 5 000 psi (35 bar to 350 bar) | 1 psi (0.1 bar) |
| 5 000 psi to 20 000 psi (350 bar to 1400 bar) | 2 psi (0.2 bar) |
| Operating Fluids | |
| Mineral oil Shell spindle oil 22, our reference 55-655, viscosity 40 cs@ 20 °C (68 °F) Distilled or deionized water |
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Tech Specs
Test Equipment General Attributes |
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| Product Height | 9.00 IN |
| Product Length | 18.00 IN |
| Product Width | 12.00 IN |
| ECCN Number | EAR99 |
| Country of Origin | United States |
| Shipping Height | 9.00 IN |
| Shipping Length | 18.00 IN |
| Shipping Width | 12.00 IN |
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