Description
Features:
• Three models available in ranges from 30 000 psi to 60 000 psi (2 000 bar to 4 000 bar)
• Two accuracy classes available; 0.02% or 0.015% of Reading
• Select nominal increments in psi, bar, or MPa pressure units
• ISO/IEC 17025 accredited calibration certificate standard
• PressCal software
• P3000 Series available for pressure/vacuum ranges and hydraulic pressures to 20 000 psi (1 400 bar) and below
The Pressurements P3800 Series is the culmination of over 50 years experience in the design and manufacture of primary pressure standards. With features and options designed to improve accuracy, increase reliability, and simplify operation, the P3800 Series can be used to calibrate virtually any high pressure sensing device including transducers, transmitters, gauges or pressure switches.
Instrument base
The Instrument base includes all items required for operation. A high quality hand pump is coupled to a 7 to 1 intensifier, allowing the operator to easily generate high pressure in the system. An oil reservoir is
included so the pump to be recharged when calibrating large volume devices. A Test Station is provided for connecting the Device under Test to the P3800 Series. Adjustable feet and the level vial allow the operator to insure the instrument is level to achieve the ultimate performance. A Piston Float Reference
allows the operator to determine when the piston is in the ideal, “mid float” position.
Piston/cylinder
The piston/cylinder is the “heart” of the deadweight tester. P3800 Series pistons are manufactured from tungsten carbide which provides excellent long term stability, durability, and extremely low coefficients for temperature and pressure.
Weight sets
Standard weight masses are series 3 non-magnetic stainless steel. Each mass is marked with the serial number of the instrument and the nominal pressure value. Select either psi, bar or MPa pressure units.
PressCal software can be used to support additional pressure units.
Gravity correction
Gravity varies significantly with geographical locations. Each instrument can be calibrated to local gravity a no additional cost. If unspecified, instruments are calibrated to standard gravity at 980.665 cm/s2.
Specifications:
| Pressure Ranges | |
| P3830 | 500 to 30,000 psi, or 40 to 2,000 bar, or 4 to 200 MPa, or 40 to 2000 kgf/cm2 |
| P3840 | 500 to 40,000 psi, or 40 to 2,600 bar, or 4 to 260 MPa, or 40 to 2600 kgf/cm2 |
| P3860 | 500 to 60,000 psi or 40 to 4,000 bar or 4 to 400 MPa or 40 to 4000 kgf/cm2 |
| Accuracy | |
| Accuracy1 | Standard accuracy is 0.02% of Reading1. Optional accuracy of 0.015% of Reading is vailable. Calibration certificate with traceability to NIST is provided with each instrument. An optional ISO/IEC 17025 accredited calibration certificate is available. |
| 1. Accuracy is 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 |
| Weight density | 7.8 g/cm3 |
| Piston material | Tungsten carbide with nickel binder |
| Cylinder material | Tungsten carbide with cobalt binder |
| Thermal coefficient of expansion | 11 ppm/°C |
| General | |
| Test port adapters | 9/16 – 18 UNF (Autoclave); 3/8 BSP; 1/2 BSP and 3/4 BSP |
| Instrument weight | 66 lbs. (30 Kg) Instrument Base only |
| Instrument size | 18 x 13.5 x 19 in (455 x 340 x 478 mm) |
| Reservoir volume | 235 cc (14.3 in3) |
| Intensifier ratio | 7 to 1 |
| Seal materials | Nitrile |
| Operating fluid | Dioctyl Sebacate (DOS), our reference 55-600 |
| Options | |
| Presscal software | Windows based software program that allows users to easily apply all necessary corrections to enhance the deadweight tester performance. Supports additional 12 pressure units (bar, mbar, MPa, kPa, psi, kg/cm2, atm, inH2O, mH2O, mmH2O, inHg, mmHg). |
| Conversion weight sets | For applications that require nominal pressure increments in measurement units different than the main unit, conversion weight sets are available. Available measurement units are: psi, bar kgf/cm2 or MPa. |
