DH-Budenberg CPB3500 Specifications

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Pneumatic dead-weight tester Model CPB3500

Applications

■

Primary standard for calibrating the pressure scale in a pneumatic range from -1 ... 120 bar / -14.5 ... 1,600 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

Calibration technology

WIKA data sheet CT 31.22

■

Total measurement uncertainty starting from

0.015 ... 0.006 % of reading

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Five dierent piston-cylinder systems available for ranges ±1 bar, 0.1 ... 7 bar, 0.2 ... 25 bar, 1 ... 70 bar and 1 ... 120 bar, or also for ranges in psi and kPa

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Stable aluminium base with a strong impact-resistant ABS cover for heavy industrial use combined with compact dimensions and light weight

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Interchangeable pistons and mass sets for each model,

mass sets manufactured from stainless steel

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Factory calibration includes traceability to national

standards, as standard; with UKAS calibration possible as

an option

Description

Proven primary standard

The model CPB3500 dead-weight tester is a genuine primary standard, which derives the measurement of pressure directly from its fundamental equation p = F/A.

This mechanical measurement principle provides superior

reliability and stability over time, eliminates most risks of

measurement error and reduces calibration uncertainties. It

makes the CPB3500 the ideal tool for the calibration of any

type of pressure measuring instruments on a daily basis.

Robustness and modularity

The instrument is built on a tough, stable aluminium base

with light weight corrosion and impact-resistant ABS case. Piston cylinders are interchangeable among the various

models within the CPB3500, so that in case of changing requirements any CPB3500 tester can easily be upgraded on

other available ranges.

Pneumatic dead-weight tester, model CPB3500

Mass sets are fully interchangeable between pistons of the same range within the claimed standard accuracy. The mass set is made of non-magnetic stainless steel so that masses remain extremely stable over time. Bases can also be quickly converted into a comparator by substituting suitable transfer standard for the piston and mass set.

Ease of operation

Two built-in precision soft seat valves combined with a

volume adjuster provide ne pressure control capability. A safety pattern gauge is tted to the instrument base to show

the approximate pressure. The masses are top loading (except on the 25 bar/400 psi range) for easier and faster operation and available in the most common pressure units.

Data sheets showing similar products and accessories:

Dead-weight tester in compact design; model CPB3800; see data sheet CT 31.06 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 dierential pressure version; model CPB5600DP; see data sheet CT 31.56 CalibratorUnit; model CPU6000; see data sheet CT 35.02

Page 1 of 9WIKA data sheet CT 31.22 ∙ 03/2015

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The mass load is proportional to the target pressure and this is achieved through optimally graduated disc weight. As

standard, these disc weights are manufactured to the stand- ard gravity (9.80665 m/s²), though they can be adjusted to a specic location and also UKAS calibrated.

The piston-cylinder system

Both the piston and cylinder are manufactured from materials with very small pressure and thermal expansion coecients, which results in a very good linearity of the eective area of the piston and thus a high measurement accuracy.

An overpressure protection is integrated, which prevents the piston from being forced out vertically and avoids damage to the piston-cylinder system in the event of disc weights removal under pressure.

The piston and cylinder are clean air/gas only systems apart from the 70 bar/1,000 psi and 120 bar/1,600 psi ranges

where the piston-cylinder system is oil lubricated. The masses are stacked on the piston-cylinder system apart

from the 25 bar/400 psi range, where the annular masses are

stacked on a mass carrier, so as to have minimum side thrust and friction on the piston-cylinder system.

The overall design of the piston-cylinder system and the very precise manufacturing of both the piston and the cylinder ensure excellent operating characteristics with a long free-rotation time, low sink rates and a very high long-term

stability. Therefore, the recommended recalibration interval is two to ve years dependent on the conditions of usage.

As a standard all instrument bases are equipped with a G 1 female thread as connection for the piston-cylinder system.

Force F

Eective area A

Pressure p

Piston-cylinder system model CPS3500

Tables of masses

The following tables show, for the respective measuring range, the number of masses within a mass set, with their

resulting nominal pressures.

Should the instrument not be operated under reference

conditions (ambient temperature 20 °C/68 °F, atmospheric pressure 1,013 mbar/14.69 psi, relative humidity 40 %), the relevant corrections must be made, for example with the CPU6000 CalibratorUnit, see page 8.

Page 2 of 9 WIKA data sheet CT 31.22 ∙ 03/2015

The disc weights are manufactured, as standard, to the

standard gravity (9.80665 m/s²) although they can be adjusted for any local gravity.

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Measuring range

[bar]

Piston and make-up weight 1 0.015 1 0.1 1 0.2 1 1 1 1

Standard mass set

Set of ne increment masses

(optional)

0.015 ... 1 0.1 ... 7 0.2 ... 25 1 ... 70 1 ... 120

Quantity

1 0.005 1 0.4 1 0.3 2 1 2 1

3 0.02 2 0.5 1 4.5 5 10 1 18

2 0.01 5 1 3 5 1 9 4 20

6 0.05 2 0.2 2 2 2 4 1 10

6 0.1 1 0.1 1 1 1 2 2 4

- - 1 0.05 1 0.5 1 0.5 1 2

- - - - - - - - 1 0.5

- - 2 0.02 2 0.2 1 0.4 1 0.4

- - 1 0.01 1 0.1 1 0.2 1 0.2

- - 1 0.005 1 0.05 1 0.1 1 0.1

- - - - 2 0.02 2 0.04 2 0.04

- - - - 1 0.01 1 0.02 1 0.02

Nominal pressure per piece

Quantity

Nominal pressure per piece

Quantity

Nominal pressure per piece

Quantity

Nominal pressure per piece

Quantity

Nominal pressure per piece

Measuring range

[psi]

Piston and make-up weight 1 1 1 3 1 10 1 10

Standard mass set

Set of ne increment masses

(optional)

Measuring range

[kPa]

Piston and make-up weight 1 1.5 1 10 1 20 1 100 1 100

Standard mass set

Set of ne increment masses

(optional)

1) Other ranges like “in. water” and “mm. water” also available on request.

1 ... 100 3 ... 400 15 ... 1,000 10 ... 1,600

Quantity Nominal

pressure per piece

1 4 1 7 2 10 2 10

2 5 1 90 1 180 1 180

5 10 2 100 3 200 6 200

2 2 1 50 1 100 1 100

1 1 2 20 2 40 2 40

1 0.5 1 10 1 20 1 20

- - 1 5 1 5 1 5

2 0.2 2 2 1 0.4 1 0.4

1 0.1 1 1 1 0.2 1 0.2

1 0.05 1 0.5 1 0.1 1 0.1

- - 2 0.2 2 0.04 2 0.04

- - 1 0.1 1 0.02 1 0.02

Quantity Nominal

pressure per piece

Quantity Nominal

pressure per piece

Quantity Nominal

pressure per piece

1.5 ... 100 10 ... 700 20 ... 2,500 100 ... 7,000 100 ... 12,000

Quantity

1 0.5 1 40 1 30 2 100 2 100

3 2 2 50 1 450 5 1,000 1 1,800

2 1 5 100 3 500 1 900 4 2,000

6 5 2 20 2 200 2 400 1 1,000

6 10 1 10 1 100 1 200 2 400

- - 1 5 1 50 1 50 1 200

- - - - - - - - 1 50

- - 2 2 2 20 1 40 1 40

- - 1 1 1 10 1 20 1 20

- - 1 0.5 1 5 1 10 1 10

- - - - 2 2 2 4 2 4

- - - - 1 1 1 2 1 2

Nominal pressure per piece

Quantity

Nominal pressure per piece

Quantity

Nominal pressure per piece

Quantity

Nominal pressure per piece

Quantity

Nominal pressure per piece

Page 3 of 9WIKA data sheet CT 31.22 ∙ 03/2015

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Specications

Model CPB3500

Piston-cylinder systems

Measuring range

bar 0.015 … 1 0.1 … 7 0.2 … 25 1 … 70 1 … 120

Required masses kg 3.3 22.5 21 29 49.5

Smallest step

(standard mass set) bar 0.005 0.05 0.3 0.5 0.5

bar - 0.005 0.01 0.02 0.02

(set of ne increment masses)

Nominal eective area of the piston in² 1/2 1/2 1/8 1/16 1/16

Measuring range

psi - 1 … 100 3 … 400 15 … 1,000 10 … 1,600

Required masses kg - 22.6 22.4 26.9 45.5

Smallest step

(set of ne increment masses)

(standard mass set) psi - 0.5 5 5 5

psi - 0.05 0.1 0.2 0.2

Nominal eective area of the piston in² - 1/2 1/8 1/16 1/16

Measuring range

kPa 1.5 … 100 10 ... 700 20 ... 2,500 100 ... 7,000 100 ... 12,000

Required masses kg 3.3 22.5 21 29 49.5

Smallest step

(standard mass set) kPa 0.5 5 30 50 50

kPa - 0.5 1 2 2

(set of ne increment masses)

Nominal eective area of the piston in² 1/2 1/2 1/8 1/16 1/16

Accuracies

Standard

Premium

% of reading 0.015 0.015 0.015 0.015 0.015

% of reading 0.008 0.006 0.006 0.006 0.006

Material

Piston High chromium steel Tungsten carbide High chromium steel

Cylinder High chromium steel Tungsten carbide Bronze

Mass set Stainless steel, non-magnetic

Weight

Piston-cylinder system kg / lb 0.5 / 1.1 1 / 2.2 1 / 2.2 2 / 4.4 2 / 4.4

bar mass set incl. mass carrier

lb/in² mass set incl.

kPa

mass set

Storage case for

mass carrier

incl. mass carrier

mass set

kg / lb 4 / 8.8 23 / 50.8 24 / 53.0 32 / 70.7 53 / 117

kg / lb 4 / 8.8 23 / 50.8 24 / 53.0 30 / 66.3 49 / 108

kg / lb 4 / 8.8 23 / 50.8 24 / 53.0 32 / 70.7 53 / 117

kg / lb 5.8 / 1.1

(optional, 2 pieces required)

Dimensions

Storage case for

mass set

(optional) 400 x 310 x 310 mm (W x H x D) and 215 x 310 x 310 mm (W x H x D)

15.8 x 12.2 x 12.2 inch (B x H x T) and 8.5 x 12.2 x 12.2 inch (B x H x T)

2) Theoretical starting value; corresponds to the pressure value generated by the piston or the piston and its make-up weights (by their own weight). To optimise the operating

characteristics more masses should be loaded.

3) The smallest pressure change value that can be achieved based on the standard mass set.

4) The smallest pressure change value that can be achieved based on the optional set of ne increment masses. For further reductions, an accessory set of class M1 or F1 trim masses is

available.

5) The accuracy is in reference to the measurement value, from 10 % of the measurement range to compensate for eects of gravity, temperature and actual area of piston unit. Standard accuracy without any corrections for actual area down to 0.02 %.

6) Available as high-accuracy class dead-weight testers supplied with UKAS calibration certicates for area and mass.

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Base

Connections

Connection for piston-cylinder system G 1 female thread

Test item connection G 1/2 female thread, loose union connection, incl. adapter set to G 1/4 and G 3/8 female

threads

External pressure connection G 1/4 female thread, G 1/4 B x 1/4 NPT (female) adapter in scope of supply

Pressure transmission medium

Base Pneumatic based on clean, dry and non-corrosive gases (e.g. air or nitrogen)

Weight

Base 12 kg / 26.5 lb

Permissible ambient conditions

Operating temperature 10 … 30 °C / 50 ... 86 °F

Dimensions

Base 510 x 490 x 300 mm / 20.1 x 19.3 x 11.8 inch (W x D x H), for details, see technical draw-

ings

Certicates

Certicate

Calibration Standard: Calibration certicate

Option: UKAS calibration certicate (area and mass calibration)

Approvals and certicates, see website

Transport dimensions for complete instrument

The complete instrument, in its standard version and standard scope of delivery, consists of up to 3 packages on a single

pallet.

The dimensions are 1,200 x 800 x 500 mm / 47.3 x 31.5 x 19.7 inch.

The overall weight is dependent on the measuring range.

Version in bar Weight in kg Version in psi Weight in kg

Range net gross Range net gross

0.015 ... 1 bar 14 35

0.1 … 7 bar 34 55 1 ... 100 psi 34 55

0.2 ... 25 bar 32 53 3 ... 400 psi 34 55

1 ... 70 bar 36 57 15 ... 1,000 psi 36 57

1 ... 120 bar 62 83 10 ... 1,600 psi 58 79

Version in kPa Weight in kg

Range net gross

1.5 ... 100 kPa 14 35

10 ... 700 kPa 34 55

20 ... 2,500 kPa 32 53

100 ... 7,000 kPa 36 57

100 ... 12,000 kPa 62 83

Page 5 of 9WIKA data sheet CT 31.22 ∙ 03/2015

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Dimensions in mm

Side viewFront view

Top view

(1) Connector for piston-cylinder system

(2) Pressure gauge

(3) Test item connection (4) Inlet valve

(5) Volume adjuster with star handle (6) Outlet valve (7) Rotatable feet

DH-Budenberg

CPB3500

WIKA

(8) Pressure generation control schematic

Standard connection piston-cylinder system Test item connection

Adapter, see scope of

delivery

Sealing ring

USIT 10.7 x 18 x 1.5

O-ring 18.4 x 3.5

Page 6 of 9 WIKA data sheet CT 31.22 ∙ 03/2015

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Accessories

Pneumatic/hydraulic separator

For calibrating low-pressure hydraulic instruments with gas

air/liquid separator is used. It can also be used to protect the

pressure balance from contamination.

Set of adapters

As a standard, the pressure balance (dead-weight tester) is equipped with a connector for connecting the test item. For

this purpose, various threaded adapters, which can be easily changed, are available:

■

Set of adapters (BSP): G ⅛, G ¼, G ⅜, G ½

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Set of adapters (NPT): ⅛ NPT, ¼ NPT, ⅜ NPT and ½ NPT

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Set of adapters (Metric): M12 x 1.5, M20 x 1.5

Vacuum adapter

Used for calibrating in the vacuum range to -1 bar/-14.5 psi (for measuring ranges 1 bar and 100 kPa only).

Pneumatic/hydraulic separator, model 35

Dirt trap, separator

For test objects that are very dirty the use of a dirt trap

is recommended in order to avoid the penetration of dirt particles into the pressure balance.

The separator (without diaphragm) has been specially

conceived for measuring instruments where the lling

medium should not come into contact with the pressure balance. It is typically used with hydraulic pressure balances for the calibration of instruments with the test media water as well as with pneumatic pressure b alances (only with external pressure supply) for the calibration of instruments with the test media water or oil.

Vacuum adapter

Fig. left: Separator Fig. right: dirt trap

Page 7 of 9WIKA data sheet CT 31.22 ∙ 03/2015

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CalibratorUnit model CPU6000

The models of the CPU6000 series are compact tools for use

with a pressure balance (dead-weight tester). In particular

when highly-accurate measuring values, with measurement uncertainties of less than 0.025 %, are required, complicated

mathematical calculations and corrections are necessary.

With the CPU6000 in combination with the CPB-CAL (iPad app) and/or WIKA-CAL (PC software) all critical ambient

parameters can be registered and automatically corrected.

The CPU6000 series is made up of three instruments

Weather station, model CPU6000-W

The CPU6000-W provides measured values such as atmospheric air pressure, relative humidity and the ambient

temperature of the laboratory environment.

Pressure balance sensor box, model CPU6000-S

The CPU6000-S measures the piston temperature and displays the oating position of the masses.

Digital multimeter, model CPU6000-M

The CPU6000-M fullls the function of a digital multimeter

and power supply unit when electronic pressure transmitters must be calibrated.

CPU6000 series and iPad® app CPB-CAL

Typical application

CPB-CAL iPad® app

The iPad balances (dead-weight testers) or the reference pressure

while taking the measured parameters from the CPU6000

into account. The conversion can be carried out in all

common pressure units. As an additional parameter, the local gravity can be specied for location-independent measure-

ments.

WIKA-CAL PC software - Weight calculator

With the demo version of the WIKA-CAL software and a CPB series pressure balance (dead-weight tester), the disc

weights to be applied and the corresponding reference pressure can be determined. The pressure balance data (dead-weight tester data) can be entered into the database manually or imported automatically via an online available

XML le.

All ambient parameters and piston temperature can be

entered manually into WIKA-CAL or can be measured automatically with the CPU6000 series, so that the highest accuracy can be achieved. WIKA-CAL demo version can be

downloaded free of charge from the WIKA website.

application calculates the mass loads for pressure

Model CPU6000-W, CPU6000-S, CPB5800 and PC with WIKA-CAL software

Further specications on the CPU6000 series can be found in data sheet CT 35.02. For details of the WIKA-CAL calibration software see data sheet CT 95.10.

WIKA-CAL PC software - Weight calculator

WIKA data sheet CT 31.22 ∙ 03/2015Page 8 of 9

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Scope of delivery

■

Instrument base with ABS cover

■

Piston-cylinder system

■

Mass set manufactured to standard gravity (9.80665 m/s²)

■

Operating instructions in English

■

Factory calibration certicate

■

1 x 500 ml bottle of oil (for 70 and 120 bar range only)

■

Standard tool roll containing:

1 - Hexagon wrench key 2 mm A/F 1 - Hexagon wrench key 3 mm A/F 2 - 30 mm A/F open ended spanners

1 - Spirit level 4 - Level plates 1 - Bag of seals 1 - G ½ B connection for test item 1 - Pointer punch 1 - Pointer remover 1 - Inlet manifold adaptor 1 - Set of connections as ordered

1 – (BSP) G ¼, G ⅜, G ½ 1 – (NPT) ¼ in, ⅜ in, ½ in 1 – (METRIC) M12 x 1.5, M20 x 1.5

Options

■

Systems with premium accuracies to 0.006 %

■

Carrying case for piston-cylinder systems

■

Mass set manufactured to local gravity

■

Sets of ne increment masses

■

UKAS calibration certicate for area and mass

Accessories

Adapter and connections

■

Adapter set “BSP” for test item connection G ½ B male on G ⅛, G ¼, G ⅜ and G ½ female

■

Adapter set “NPT” for test item connection G ½ B male on ⅛ NPT, ¼ NPT, ⅜ NPT and ½ NPT female

■

Adapter set “metric” for test item connection G ½ B male on M12 x 1.5 and M20 x 1.5 female

■

Vacuum adapter (for measuring ranges 1 bar and 100 kPa

only)

■

Test item connection G 1 male to G ½ femal, rotating

■

Dual test item connection G 1 male to 2 x G ½ femal, rotating (Model 27)

Fine increment masses

■

Fine increment masses in bar

■

Fine increment masses in psi

■

Fine increment masses in kPa

Fluids

■

Hydraulic uid based on VG22 mineral oil in plastic bottle, content 0.5 litre

Dirt trap, separator

■

Dirt trap, -1 ... +1,000 bar, volume 0.2 litres

■

Dirt trap, -1 ... +1,000 bar, volume 0.03 litres

■

Separator 0 ... 35 bar (model 35)

■

Separator (without diaphragm), max. 1,000 bar

Storage

■

Storage case for CPB3500 instrument base

■

Two storage boxes for mass set

03/2015 EN

Tools

■

Sealing and maintenance set for instrument base

■

Tool set consisting of open-ended spanner, BSP adapters, replacement seals, pointer remover and pointer punch

Ordering information

Model / Package / Accuracy / Gravity value g / Fine increment masses / Standard set of adapters / Vacuum adapter / Storage case / Calibration for dead-weight tester / Calibration for ne increment masses / Accessories / Additional ordering information

© 2015 WIKA Alexander Wiegand SE & Co. KG, all rights reserved. The specications given in this document represent the state of engineering at the time of publishing. We reserve the right to make modications to the specications and materials.

Page 9 of 9WIKA data sheet CT 31.22 ∙ 03/2015

WIKA Alexander Wiegand SE & Co. KG

Alexander-Wiegand-Straße 30 63911 Klingenberg/Germany Tel. +49 9372 132-0 Fax +49 9372 132-406 info@wika.de www.wika.de