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 CPB3800 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 CPB3800 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 CPB3800
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PISTON-CYLENDER SYSTEMS (STANDARD)
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Measuring range 1)
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1 … 120 bar
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2.5 ... 300 bar
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5 ... 700 bar
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10 ... 1,200 bar
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Required masses
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41 kg
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50 kg
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58 kg
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50 kg
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Smallest step 2)
(Standard mass set)
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1 bar
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2.5 bar
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5 bar
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10 bar
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Nominal effective area of the piston
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1/16 in?2;
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1/40 in?2;
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1/80 in?2;
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1/160 in?2;
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Measuring range 1)
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10 … 1,600 lb/in?2;
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25 ... 4,000 lb/in?2;
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50 ... 10,000 lb/in?2;
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100 ... 16,000 lb/in?2;
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Required masses
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37 kg
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46 kg
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58 kg
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46 kg
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Smallest step 2)
(Standard mass set)
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10 lb/in?2;
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25 lb/in?2;
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50 lb/in?2;
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100 lb/in?2;
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Nominal effective area of the piston
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1/16 in?2;
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1/40 in?2;
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1/80 in?2;
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1/160 in?2;
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Accuracies
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Standard 3) 4)
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0.05 % of reading
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Option 3) 4)
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0.025 % of reading
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Pressure transmission medium
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Hydraulic fluid based on VG22 mineral oil (0.5 l included in scope of delivery)
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Material
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Piston
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Tungsten carbide
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Cylinder
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Tungsten carbide
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Mass set
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Stainless steel, non-magnetic
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Weight
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Piston-cylinder system
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2.4 kg [5.3 lbs]
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bar mass set incl. mass carrier
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41.5 kg [91.5 lbs]
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50.5 kg [111.4 lbs]
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58.5 kg [129.0 lbs]
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50.5 kg [111.4 lbs]
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lb/in?2; mass set incl. mass carrier
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37 kg [81.4 lbs]
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45.6 kg [100.5 lbs]
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57 kg [125.5 lbs]
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45.5 kg [100.5 lbs]
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Storage case for mass set
(optional, 2 pieces required)
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11 kg [24.2 lbs]
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Dimensions (W x D x H)
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Storage case for mass set (optional)
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400 x 320 x 320 mm and 320 x 220 x 320 mm
[15.7 x 12.6 x 12.6 in] and [12.6 x 8.7 x 12.5 in]
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