- Total measurement uncertainty starting from 0.015 ... 0.006 % of reading
- Four different piston-cylinder systems available for ranges ±1 bar, 0.1 ... 7 bar, 0.2 ... 25 bar, 1 ... 70 bar and 1 ... 120 bar, or also for ranges in lb/in² and kPa
- Stable aluminium base with a strong impact-resistant ABS cover for heavy industrial use combined with compact dimensions and light weight
- Interchangeable pistons and mass sets for each model, mass sets manufactured from stainless steel
- Factory calibration includes traceability to national standards, as standard; with UKAS calibration possible as an option
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- Total measurement uncertainty up to 0.025 % of reading
- Upgradeable using CPS5800/CPM5800 to provide increased accuracy to 0.006 %
- Direct replacement of original DH-Budenberg 580 series
- Factory calibration included as standard, traceable to national standards, with UKAS calibration possible as an option
- Masses manufactured from stainless steel, can be adjusted to local gravity
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- Total measurement uncertainty up to 0.01 % of reading
- Dual-range piston-cylinder system 2,600 bar (40,000 lb/in²) with fully automated changing between ranges
- Factory calibration includes traceability to national standards, as standard, with UKAS calibration possible as an option
- Masses manufactured from stainless steel, can be adjusted to local gravity
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- Total measurement uncertainty to 0.008 % of reading
- Factory calibration included as standard, traceable to national standards; with DKD/DAkkS calibration possible as an option
- High long-term stability with recommended recalibration interval every five years
- Masses manufactured from stainless steel and aluminium, can be adjusted to local gravity
- Quick and safe replacement of the piston-cylinder system for measuring range changes via patented ConTect quickrelease system as an option
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Bedienungsanleitung
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- Total measurement uncertainty to 0.02 % of reading
- Factory calibration includes traceability to national standards, as standard; with DKD/DAkkS calibration possible as an option
- High long-term stability with recommended recalibration cycle every five years
- Masses manufactured from stainless steel and aluminium, can be adjusted to local gravity
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- Measuring ranges (= static pressure + differential pressure) up to 400 bar (5,000 psi) pneumatic, up to 1,600 bar (23,200 psi) hydraulic
- Total measurement uncertainty to 0.008 % of differential pressure plus 0.0001 % (1 ppm) of static pressure
- Factory calibration included as standard, traceable to national standards; with DKD/DAkkS calibration possible as an option
- High long-term stability with recommended recalibration interval every five years
- Masses manufactured from stainless steel and aluminium, can be adjusted to local gravity
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Special Features
- Total measurement uncertainty to 0.006 % of reading
- Extremely flexible instrument with a wide range of single and dual-range piston-cylinder systems
- Dual-range piston-cylinder systems with fully automated changing between ranges
- Factory calibration includes traceability to national standards, as standard, with UKAS calibration possible as an option
- Fast and safe replacement of the piston-cylinder system via patented ConTect quick-release system as an option
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- Total measurement uncertainty to 0.002 % of reading, depending on model
- COFRAC calibration certificate included as standard
- Available up to 1,000 bar (14,500 psi) pneumatic and 5,000 bar (72,500 psi) hydraulic
- 15 different piston-cylinder sizes available
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- Measuring range (= static pressure + differential pressure) up to 800 bar / 11,600 psi pneumatic
- Total measurement uncertainty to 0.008 % of differential pressure plus 0.0001 % (1 ppm) of static pressure
- COFRAC calibration certificate included as standard
- High long-term stability with recommended recalibration cycle every five years
- DP from 10 Pa up to 800 bar / 0.04 inH2O up to 11,600 psi with static pressure effects down to 1 ppm
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- Total measurement uncertainty down to 20 ppm of reading
- Available up to 1,000 bar / 14,500 psi pneumatic and 5,000 bar / 72,500 psi hydraulic
- Automatic mass loading system with a resolution down to 0.1 g
- Automatic pressure generation
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- Measuring range up to 500 bar (7,250 psi)
- Accuracy to 35 ppm of reading
- Absolute and gauge pressure measurement
- No loading of masses required
- Intuitive touchscreen based user interface
- Two year warranty
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- Two fine metering valves for pressure inlet and pressure outlet or vacuum
- Precisely adjustable volume adjuster for fine adjustment of pressure
- Proven technology of the dead-weight tester CPB3500
- Connection for external pressure or vacuum source
- Pressure gauge for indicating the approximate pressure
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- Ranges: from 30 ... 600 bar / 500 ... 8,000 psi (model 80) and from 7 ... 120 bar / 100 ... 1,600 psi (model 80L)
- Accuracy: 0.03 % + 0.05 bar (model 80) and 0.04 % + 0.015 bar (model 80L)
- Ergonomic layout ideal for field use
- All instruments supplied with certification traceable to national standards
- UKAS certificate is available through our pressure standards laboratory as an optional extra
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- Patent applied for, among others DE Patent No. 102013215351
- New calibration concept simplifies certificate generation
- Easy operation and set up
- Acquisition and automatic correction of all critical influencing factors, to increase the accuracy of the measurement
- Can also be used with other calibration instruments and WIKA-Cal software
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Deadweight Testers – primary pressure standards for highest accuracy
Deadweight testers generate pressure from the force of calibrated masses acting on a precision piston–cylinder assembly. They are the primary standard for pressure—covering vacuum up to the ultra-high-pressure range—and underpin ISO/IEC 17025-traceable calibration in labs and production.
Highlights (model-dependent): operation with gas or liquid media (air/N₂, oil, water), ranges from mbar to 2,000+ bar, mass stacks in graded values, piston rotation to minimize friction, temperature/density/gravity corrections, ports G 1/4 (BSPP), NPT, M20×1.5, optional cross-float and fine pressure adjusters.
ICS Schneider Messtechnik supplies complete systems including adapter/hose kits, media, accessories, calibration certificates, and support for uncertainty budgeting and documentation.
FAQ on Deadweight Testers
Answers on operating principle, media selection, corrections, uncertainty, operation, safety and maintenance.
How does a deadweight tester work?
Pressure follows p = F/A: the weight force (mass stack × g, incl. piston/carrier) acts on the effective piston area. Rotating the piston reduces friction and indicates the correct float position.
Which media are typical?
| Media | Advantages | Notes |
|---|---|---|
| Gas (air/N₂) | Clean, no oil contamination | Limited max pressure; apply air buoyancy correction |
| Oil (mineral/synthetic) | High pressures, good lubrication | Consider viscosity/temperature; check material compatibility |
| Water | Oil-free, clean; common in clean applications | Dry/preserve after use; prefer 316L and corrosion control |
What accuracy is achievable?
Expanded uncertainties in the 10⁻⁴ range of reading are typical (model/range dependent). The result depends on piston area, mass tolerance, local g, temperature and buoyancy/viscosity.
Which corrections must be applied?
- Local gravity g (site-specific, m/s²)
- Air buoyancy (gas use: mass & air density)
- Temperature (thermal expansion of piston area)
- Head/height correction (density × g × height difference)
- Viscosity/rotation (ensure laminar regime with rotation)
How do I set the correct float position?
Spin the piston with the rotary drive and use the fine adjuster to raise/lower pressure until the center mark (float indicator) is achieved and held.
How should I choose the pressure range?
Mass sets cover stepped points. Aim for the working area to use 60–90 % of the piston span. Use larger areas/smaller masses for low pressures and smaller areas/larger masses for high pressures.
Can I calibrate gauge, absolute and differential pressure?
Yes. Gauge vs ambient, absolute with a barometric reference/absolute setup, and differential via suitable manifolds with equalize/isolate and two ports.
What is cross-float?
A comparison of two deadweight testers by making both float simultaneously, used to verify linearity and traceability across overlapping ranges.
Which environmental influences are critical?
Temperature stability (piston area/mass), vibration, leveling (use a spirit level) and drafts for gas setups. Operate on a rigid, level surface.
How do I compute the head/height correction?
Δp = ρ · g · Δh, with ρ the media density (oil/water) and Δh the vertical distance between the piston reference height and the DUT’s sensing element.
What piston/cylinder materials are used?
| Material | Properties | Use |
|---|---|---|
| Tungsten carbide | Very wear-resistant, low deformation | High pressure, lab standards |
| Hardened steel | Robust, economical | General applications |
| Special alloys | Corrosion resistance | Water/chemical media |
How long to stabilize a test point?
Typically seconds to minutes depending on viscosity, temperature and system volume. Rotation speeds laminar embedding and reduces friction effects.
What are common pitfalls?
- No stable float → friction/contamination; clean, check oil, rotate gently.
- Drift → temperature change or leakage; verify tightness, allow to settle.
- Wrong pressure → missed corrections (g, buoyancy, Δh); apply certificate parameters.
How do I run a leak/hold test?
Load the target mass, establish float, then isolate and record the drift rate (mbar/min) over a defined interval. Log temperature and compensate if needed.
What safety aspects matter?
- Provide over-pressure relief, especially at high pressure.
- Use whip checks and strain relief on hoses.
- Operate within approved p/T and media; always depressurize before loosening.
How are masses and piston area calibrated?
Factory or accredited calibration with full traceability. Certificates include nominals, corrections, uncertainties and conditions (temperature, g, air density).
Which documents will I receive?
A calibration certificate with as-found/as-left, points, expanded uncertainty (k=2), applied corrections, environmental data and the traceability chain.
What care/maintenance is recommended?
- Keep piston/cylinder clean; use proper media/filters.
- Regularly check the rotary drive, seals and bearings.
- Monitor oil quality; dry/preserve water systems after use.
Do you support selection & uncertainty budgeting?
Yes—we size ranges/mass sets, define required corrections, prepare an uncertainty budget, and integrate the system into your QMS/CMMS.