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LR-Cal CPB5000-HP, Deadweight Tester / High Pressure Balance, Model LR-Cal CPB5000-HP, Hydraulic, max. 5000 bar (70000 psi)
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Proven primary pressure standard
Deadweight Tester / Pressure Balances are the most accurate instrument available on the market for the calibration of electronic or mechanical pressure measuring instruments. The direct measurement of the pressure (p = F / A), as well as the use of high-quality materials enable a very small measurement uncertainty, in conjunction with an excellent long-term stability of 5 years (recommended in accordance with German Calibration Service DKD/DAkkS).
The deadweight tester / pressure balance has therefore been used for years in factory and calibration laboratories in national institutes, research laboratories and in industry.

Stand-alone operation
Due to its integrated pressure generation and the pure mechanical measuring principle, the model LR-Cal CPB5000-HP is ideal for on-site use for maintenance and service.

Basic principle
Pressure is defined as the quotient of force and area. The core component of the model LR-Cal CPB5000-HP is therefore a very pecisely manufatured piston-cylinder-system, which is loaded with masses in order to generate the individual test points.
The masses applied are proportional to the target pressure and this is achieved through optimally graduated weights. As standard, these masses are manufactured to the standard gravity (9.80665 m/s²), though the can be manufactured to a specific location (gravity) and also DAkkS-calibrated.

Easy operation
The setting of the pressure is made via an integrated pump. For fine adjustment, a very precisely controllable spindle pump is fitted, with a spindle running within it.
As soon as the measuring system reaches equilibrium, there is a balance of forces between the pressure and the mass load applied. The excellent quality of the system ensures that this pressure remains stable over several minutes, so that the pressure value for comparative measurements can be read without any problems, or also so that more complex adjustments can be carried out on the test item.

Robust instrument design
With the high-pressure model LR-Cal CPB5000-HP, calibrations up to a maximum pressure of 5,000 bar are possible.
It is built into a stable base and offers exceptional ease-of-use. With the integrated priming pump and the 250 ml tank, large test volumes can also be easily filled and primed.

Deadweight Tester (Pressure Balance, Primary Pressure Standard),
hydraulic, Ranges from 25...2,500 bar to 25...5,000 bar and 350...40,000 psi to 350...70,000 psi
or with dual piston system with range 1...2,600 bar / 10...40,000 psi.
Accuracy (measurement uncertainty) ±0.020% or ±0.025% of measured value.

Applications:

  • Reference instrument for the calibration of pressure measuring instruments
  • Primary pressure standard for calibration laboratories and factory, for the testing, adjustment and calibration of pressure measuring instruments, for defining the pressure scale in a range up to 5,000 bar
  • Complete stand-alone system, also suitable for on-site use

Features:

  • Total measurement uncertainty to 0.02% of measured value
  • Range 2,600 bar with dual-range piston-cylinder system with fully automated changing between ranges
  • Including factory calibration certificate; DAkkS certificate as option
  • High long-term stability with recommended recalibration cycle every 5 years
  • Masses made from stainless steel and aluminium, can be manufactured to local gravity
Design Single-piston Dual-piston
Measuring range 1) bar 25...2,500 25...4,000 25...5,000 1...50/20...2,600
Required masses kg 50 80 100 107
Smallest step (standard mass set) 2) bar 2,5 2,5 2,5 0.5/10
Nominal cross-sectional area of the piston cm² 0.02 0.02 0.02 0.8065/0.0403
Measuring range 1) psi 350...40,000 350...60,000 350...70,000 10...600/200...40,000
Required masses kg 55 83 97 119
Smallest step (standard mass set) 2) psi 50 50 50 5/100
Nominal cross-sectional area of the piston cm² 0.02 0.02 0.02 0.8065/0.0403
Accuracy 3) 4) % of
measured
value		 0.025 / optional 0.02 0.025 / optional 0.007
Pressure transmission medium up to 4,000 bar / 60,000 psi:
hydraulic fluid based on VG22 mineral oil
(1 litre included in scope of delivery)
5,000 bar / 70,000 psi:
Sebacate oil (0.5 litre included in scope of delivery)
Fluid reservoir cm²  250
Test item connection rotatable, including three male adapters
M16 x 1.5 / M20 x 1.5 and 9/16-18 UNF
Material
Piston hardened steel Tungsten carbide / steel
Cylinder Tungsten carbide Steel / tungsten carbide
Set of masses Stainless steel 1.4305, non-magnetic
Piping in instrument base Stainless steel 1.4404, 6 x 2 mm
Permissible ambient conditions
Operating temperature °C 18...28
Weights
High pressure basement kg 32.5
Piston-cylinder system kg 2.7 (5.0 incl. storage case)
BAR basic set of masses, case 1 kg 34.0 34.0 34.0 43.3
BAR basic set of masses, case 2 kg 27.5 27.5 27.5 29.7
BAR basic set of masses, case 3 kg --- --- --- 29.4
BAR basic set of masses, case 4 kg --- --- --- 29.4
BAR extension set of masses, case 1 kg --- 33.5 33.5 ---
BAR extension set of masses, case 2 kg --- --- 23.5 ---
PSI basic set of masses, case 1 kg 51.0 51.0 51.0 40.5
PSI basic set of masses, case 2 kg 15.0 15.0 15.0 33.6
PSI basic set of masses, case 3 kg --- --- --- 33.6
PSI basic set of masses, case 4 kg --- --- --- 31.6
PSI extension set of masses, case 1 kg --- 31.8 31.8 ---
PSI extension set of masses, case 2 kg --- --- 17.8 ---
Dimensions
Base mm W 460 x D 445 x H 265
Carrying case 1 for basic set of masses mm W 400 x D 310 x H 310
Carrying case 2-4 for basic set of masses mm W 215 x D 310 x H 310
Carrying case for extension set of masses mm W 215 x D 310 x H 310
Storage case for piston-cylinder system mm W 370 x D 150 x H 150
Approvals and certificates
CE conformity Pressure equipment directive 97/23/EC (module A)
Calibration Traceable factory certificate of calibration
Optional: DAkkS-Certificate for single-piston versions or UKAS for dual-piston version

1) Theoretical starting value; corresponds to the pressure value generated by the piston (by its own weight). To optimise the operating characteristics, more weights should be loaded.

2) The smallest pressure change value that can be achieved based on the standard weight set. To reduce this, a set of trim-masses is available (see accessories).

3) The accuracy from 10% of the measuring range is based on the measured value. In the lower range, a fixed error based on 10% of the range applies.

4) Measurement uncertainty assuming reference conditions (ambient temperature 20°C, air pressure 1,013 mbar, relative humidity 40%). Corrections must be made if required.

LR-Cal CPB5000-HP Scope of standard delivery + Options

Scope of standard delivery:

  • Base with adjustable feet
  • Priming pump
  • Spindle pump for pressure generation and fine adjustment
  • Piston connection
  • Connection for test item with 3 thread adapters; M16 x 1.5 / M20 x 1.5 and 9/16-18 UNF
  • Piston-cylinder system
  • Set of masses divided between several transport cases, see specifications
  • Set of masses manufactured to standard gravity 9.80665 m/s²
  • Mineral oil 1.0 litre (up to 4,000 bar / 60,000 psi); Sebacate oil 0.5 litre (for 5,000 bar / 70,000 psi)
  • Flats 36 and flats 46 open-ended spanner
  • Manual in English and German language
  • Traceable factory certificate of calibration

Options:

  • System with increased accuracy to 0.02% or 0.007%
  • Set of masses manufactured to local gravity
  • Fine increment weights
  • DAkkS certificate (for dual-piston version: UKAS certificate)
Order-Code Description Image
LDW-FMS-F1

The weights included in the standard mass set are ideally suited for everyday use. If smaller intermediate values need to be generated, we recommend using a set of trim-masses.

Trim-mass set, class F1
(1 x 50 g, 2 x 20 g, 1 x 10 g, 1 x 5 g, 2 x 2 g, 1 x 1 g,
1 x 500 mg, 2 x 200 mg, 1 x 100 mg, 1 x 50 mg,
2 x 20 mg, 1 x 10 mg, 1 x 5 mg, 2 x 2 mg, 1 x 1 mg

  
LDW-FMS-M1 Trim-mass set, class M1
(1 x 50 g, 2 x 20 g, 1 x 10 g, 1 x 5 g, 2 x 2 g, 1 x 1 g,
1 x 500 mg, 2 x 200 mg, 1 x 100 mg, 1 x 50 mg,
2 x 20 mg, 1 x 10 mg, 1 x 5 mg, 2 x 2 mg, 1 x 1 mg

For more information, click here!

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Manual