Calibration technology
WIKA data sheet CT 31.11
Page 1 of 13WIKA data sheet CT 31.11
∙ 04/2016
for further approvals
see page 8
Data sheets showing similar products and accessories:
Dead-weight tester in compact design; model CPB3800; see data sheet CT 31.06
Pneumatic pressure balance; model CPB5000; see data sheet CT 31.01
Pressure balance for high pressure; model CPB5000HP; see data sheet CT 31.51
Pressure balance dierential pressure version; model CPB5600DP; see data sheet CT 31.56
CalibratorUnit; model CPU6000; see data sheet CT 35.02
Hydraulic pressure balance
Model CPB5800
Hydraulic pressure balance model CPB5800
Applications
■
Primary standard for calibrating the pressure scale in a
hydraulic range up to 1,400 bar (20,000 psi)
■
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 to 0.006 % of reading
■
Extremely exible 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 included as standard, traceable to
national standards, 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
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 CPB5800 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 CPB5800 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 also UKAS calibrated.
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Easy operation
In the stable instrument base, the integrated priming pump
and the 250 ml tank enable large test volumes to be easily
lled and pressurised. For further pressure increases and
ne adjustment, a very precisely controllable spindle pump is
tted, which only runs within the pump body.
As soon as the measuring system reaches equilibrium, there
is a balance of forces between the pressure and the masses
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.
High-performance instrument range
The CPB5800 instrument bases are available in 2 variants:
■
Standard hydraulic base
- up to max. 1,200 bar (16,000 psi)
- with integrated pressure generation through priming
pump and spindle pump
- Pressure transmission medium
Standard: Mineral oil
Optional: Sebacate oil, brake uid, Skydrol or Fomblin oil
■
Hydraulic high-pressure base
- up to max. 1,400 bar (20,000 psi)
- with integrated pressure generation through priming
pump and spindle pump
- Pressure transmission medium mineral oil or Sebacate
oil
As standard, both instrument bases are tted with a
connection for the model CPS5800 piston-cylinder system
with G ¾ male thread.
As an option a M30 x 2 female thread for optional CPS5000
piston-cylinder systems is available.
With the 1,200 bar instrument base (16,000 psi instrument
base), the patented ConTect quick-release mechanism
is available as an option. This enables the piston-cylinder
system to be changed quickly and safely without any tools.
The connection of the test item is made without tools using
a quick connector. Via the freely rotating knurled nut, the test
item can be oriented as required. As standard, a threaded
insert with a G ½ female thread is provided. Other threaded
inserts are available to connect the most common pressure
measuring instruments.
The instrument base model CPB5800
Standard connection piston-cylinder system
Test item connection
1
Oil collecting tray
2
Temperature sensor, optional
3
Threaded insert, changeable
4
O-ring 8 x 2
5
Quick connector with knurled nut