Proven primary standard
Pressure balances (dead-weight testers) are the most accurate instruments 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. The pressure balance (dead-weight tester) has therefore been used for years in factory and calibration laboratories in industry, national institutes and research laboratories.
Stand-alone operation
Due to its integrated pressure generation and the purely mechanical measuring principle, the model CPB3800HP 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 CPB3800HP is therefore a very precisely manufactured piston-cylinder system, onto which a mass load is applied in order to generate the individual test points. The mass load is proportional to the target pressure and this is achieved through optimally graduated masses. As standard, these masses are manufactured to the standard gravity (9.80665 m/s?2;), though they can be adjusted to a specific location and also UKAS calibrated.
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Specifications
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Model CPB3800HP
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PISTON-CYLENDER SYSTEMS
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Measuring range 1)
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1 … 60 bar / 20 … 2,600 bar
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Required masses
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107 kg
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Smallest step 2) (Standard mass set)
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0.5 bar / 10 bar
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Nominal effective area of the piston
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1/8 in?2; / 1/160 in?2;
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Measuring range 1)
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10 … 800 lb/in?2; / 200 … 40,000 lb/in?2;
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Required masses
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119 kg
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Smallest step 2) (Standard mass set)
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5 lb/in?2; / 100 lb/in?2;
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Nominal effective area of the piston
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1/8 in?2; / 1/160 in?2;
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Accuracies
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Standard 3) 4)
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0.025 % of reading
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Premium 3) 4)
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0.01 % of reading
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Pressure transmission medium
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Hydraulic fluid based on VG22 mineral oil (0.5 litre included in scope of delivery)
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Material
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Piston
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Tungsten carbide / steel
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Cylinder
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Steel / tungsten carbide
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Weight
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Piston-cylinder system
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2 kg [4.4 lbs]
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bar mass set, box 1
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43.3 kg [95.5 lbs]
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bar mass set, box 2
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29.7 kg [65.5 lbs]
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bar mass set, box 3
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29.4 kg [64.8 lbs]
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bar mass set, box 4
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29.4 kg [64.8 lbs]
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lb/in?2; mass set, box 1
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40.5 kg [89.3 lbs]
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lb/in?2; mass set, box 2
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33.6 kg [74.1 lbs]
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lb/in?2; mass set, box 3
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33.6 kg [74.1 lbs]
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lb/in?2; mass set, box 4
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31.6 kg [69.7 lbs]
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Dimensions (W x D x H)
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Carrying case 1 for mass set (optional)
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400 x 310 x 310 mm [15.8 x 12.2 x 12.2 in]
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Carrying case 2 - 4 for mass set (optional)
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215 x 310 x 310 mm [8.5 x 12.2 x 12.2 in]
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