Calibration
WIKA data sheet CT 31.06
Page 1 of 16
WIKA data sheet CT 31.06
∙ 03/2020
Data sheets showing similar products and accessories:
Pneumatic pressure balance; model CPB5000; see data sheet CT 31.01
Hydraulic pressure balance; model CPB5800; see data sheet CT 31.11
Pressure balance for high pressure; model CPB5000HP; see data sheet CT 31.51
Pressure balance for dierential pressure; model CPB5600DP; see data sheet CT 31.56
CalibratorUnit; model CPU6000; see data sheet CT 35.02
Dead-weight tester in compact design
Model CPB3800
Dead-weight tester in compact design,
model CPB3800
Description
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 dened 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/s²), though they can be adjusted to
a specic location and calibrated according to UKAS
accreditation.
for further approvals
see page 9
Applications
■
Primary standard for calibrating the pressure scale in a
hydraulic range up to 1,200 bar [16,000 lb/in²]
■
Reference instrument for factory and calibration
laboratories for the testing, adjustment and calibration of
pressure measuring instruments
■
Complete, stand-alone system, also suitable for on-site
use
Special features
■
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
WIKA data sheet CT 31.06 ∙ 03/2020 Page 2 of 16
Easy operation
The integrated dual-area spindle pump enables rapid lling
of the test system and smooth pressure generation up to
1,200 bar [16,000 lb/in²]. At the same time, the precisely
adjustable spindle pump also enables ne pressure
adjustment. A control schematic for pressure generation on
the instrument base facilitates quick and easy operation.
As soon as the measuring system reaches equilibrium, there
is a balance of forces between the pressure and the masses.
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.
Compact instrument version
The CPB3800 is also particularly notable for its compact
dimensions, which are not altered during operation, since the
spindle runs within the pump body.
With its compact dimensions, the exceptionally robust ABS
plastic case and the low weight associated with these, the
CPB3800 is also particularly suited to on-site applications.
CPB3800 with dual-range piston-cylinder
systems
Next to the standard piston-cylinder systems the CPB3800
instrument base can also be combined with the CPS5800
single- or dual-range piston-cylinder systems.
With this combination the former 580 series dead-weight
tester from DH-Budenberg is still available. This includes all
580L/580M/580DX and 580HX instruments and are identical
in form, t, function, specication and quality.
The table below shows WIKA's model code combinations to
the corresponding 580 series models.
Replacement instruments for DH-Budenberg 580 series
Former model
designations
Replacement model code combinations
Instrument
base
Piston-cylinder
system / mass set
Range
1)
Accuracy
Standard Premium
580L CPB3800 CPS5800 / CPM5800 1 ... 120 bar [10 ... 1,600 lb/in²] 0.015 % 0.007 %
580M CPB3800 CPS5800 / CPM5800 2 ... 300 bar [30 ... 4,000 lb/in²] 0.015 % 0.006 %
580DX CPB3800 CPS5800 / CPM5800 1 ... 60 bar / 10 ... 700 bar
[10 ... 800 / 100 ... 10,000 lb/in²]
0.015 % 0.006 %
580HX CPB3800 CPS5800 / CPM5800 1 ... 60 bar / 20 ... 1,200 bar
[10 ... 800 / 200 ... 16,000 lb/in²]
0.015 % 0.007 %
1) Standard weights are dual marked in pressure units bar and kPA. Also available for kg/cm² and lb/in².
For detailed specications see page 6, 8 and 9.
Control schematic on the CPB3800 instrument base
Dead-weight tester CPB3800 with piston unit CPS5800