Kistler 6904A1 Owner's manual

Brand: Kistler

Model: 6904A1

Type: Owner's manual

Instruction

manual

Pressure generator

Type 6904A1

6904A_002-716e-12.17

Foreword

6904A_002-716e-12.17 Page 1

Foreword

Thank you for choosing a Kistler quality product

characterized by technical innovation, precision and long

life.

Information in this document is subject to change without

notice. Kistler reserves the right to change or improve its

products and make changes in the content without

obligation to notify any person or organization of such

changes or improvements.

as expressly provided herein, no part of this manual may

be reproduced for any purpose without the express prior

written consent of Kistler Group. Kistler is a registered

trademark of Kistler Holding AG. Kistler Group products

are protected by various intellectual property rights. For

more details visit www.kistler.com

Kistler Group

Eulachstrasse 22

8408 Winterthur

Switzerland

Tel. +41 52 224 11 11

Fax +41 52 224 14 14

info@kistler.com

www.kistler.com

Pressure generator Type 6904A1

Page 2 6904A_002-716e-12.17

Content

1. Foreword ...................................................................................................................................... 3

2. Before you start ........................................................................................................................... 4

2.1 Scope of supply ................................................................................................................... 4

2.2 Safety first ........................................................................................................................... 4

2.3 Golden rules ........................................................................................................................ 4

3. System description ..................................................................................................................... 5

3.1 The selector valve ............................................................................................................... 6

3.2 The spindle .......................................................................................................................... 6

3.3 Sensor mounting ports ........................................................................................................ 7

3.4 Mounting seal configuration ................................................................................................ 7

4. Installation and commissioning ................................................................................................. 8

4.1 Mounting the pressure generator ........................................................................................ 8

4.2 Fitting the lever arms ........................................................................................................... 9

4.3 Check sensor mounting ports ............................................................................................. 9

4.4 Filling the fluid reservoir .................................................................................................... 10

4.5 Purging the system ........................................................................................................... 10

5. Operation .................................................................................................................................... 11

5.1 Mounting sensors .............................................................................................................. 11

5.1.1 Reference sensor ................................................................................................. 11

5.1.2 Unit under test ...................................................................................................... 11

5.2 Priming .............................................................................................................................. 12

5.3 Pressure application .......................................................................................................... 12

6. Appendix .................................................................................................................................... 13

6.1 Dimensions ........................................................................................................................ 13

6.2 Spare parts ........................................................................................................................ 14

6.3 Additional equipment ......................................................................................................... 14

6.4 Calibration fluid.................................................................................................................. 15

Total pages: 15

6904A_002-716e-12.17 Page 3

1. Foreword

Please take the time to thoroughly read this instruction

manual. It will help you with the installation, maintenance,

and use of this product.

To the extent permitted by law Kistler does not accept

any liability if this instruction manual is not followed or

products other than those listed under Accessories are

used.

Kistler offers a wide range of products for use in

measuring technology:

 Piezoelectric sensors for measuring force, torque,

strain, pressure, acceleration, shock, vibration and

acoustic-emission

 Strain gage sensor systems for measuring force and

torque

 Piezoresistive pressure sensors and transmitters

 Signal conditioners, indicators and calibrators

 Electronic control and monitoring systems as well as

software for specific measurement applications

 Data transmission modules (telemetry)

Kistler also develops and produces measuring solutions

for the application fields engines, vehicles, manufac-

turing, plastics and biomechanics sectors.

Our product and application brochures will provide you

with an overview of our product range. Detailed data

sheets are available for almost all products.

If you need additional help beyond what can be found

either on-line or in this manual, please contact Kistler's

extensive support organization.

Pressure generator Type 6904A1

Page 4 6904A_002-716e-12.17

2. Before you start

2.1 Scope of supply

The Type 6904A1 Hydraulic Pressure Generator is

supplied with the following components:

 Pressure generator

 Lever arms (3)

 Bench clamps (2)

 Blanking plugs (3)

 Spare seal sets (3)

 Calibration fluid (500 ml)

 Hook wrench

2.2 Safety first

Eye protection must be worn for protection against

possi

ble fluid spray and splashes. Furthermore, a

damaged sensor membrane may result in fluid entering

the sensor body. The subsequent pressure build-up can

cause sensor rapture, which could result in fragments,

e.g. connector parts, being projected through the air.

2.3 Golden rules

High pressure

 Always make sure that pressure has been released

before removing any sensors, plugs or adaptors.

 Never exceed the specified operating range of the

installed sensors.

Work cleanly

 Maintain a clean calibration environment

 Clean up any spilt calibration fluid.

 Clean the sensor mounting ports every time before

mounting a sensor or adaptor.

 Fit the supplied blanking plugs when the Pressure

Generator is not in use.

Torque & Tools

 Always use

the correct mounting torques as

specified for each sensor type.

 Use specified mounting tools, adapters and seals

System description

6904A_002-716e-12.17 Page 5

3. System description

The Type 6904A1 serves as pressure generator for the

calibration of piezoelectric pressure sensors.

Pressure is generated by a specially developed spindle-

operated plunger pump. The Pressure Generator’s

spindle mechanism delivers ripple-free hydraulic

pressure. This smooth spindle control, together with

minimized trapped air volumes allow for quick and

effective calibration under conditions similar to those

applied in Kistler’s End-of-Line (i.e. factory) calibrations.

Pressure rating

bar

300

Piston diameter

Piston Stroke

≈ 75

Displaced volume

≈ 23

Weight

≈ 11

Sensor mounting ports

3x M14x1,25

Calibration fluid

Kistler type 1055 / 1057

Pressure generator Type 6904A1

Page 6 6904A_002-716e-12.17

3.1 The selector valve

The selector valve isolates the cylinder from the fluid

reservoir

Position 0 ("Open")

 Fluid can flow freely

between the reservoir and

the pressure cylinder.

 The sensor mounting ports

are at atmospheric

pressure.

 Use this setting when

priming the pressure

generator.

Position P ("Pressure")

 The value is closed, i.e.

the reservoir is isolated

from the pressure cylinder.

 Use this valve setting

when applying pressure.

3.2 The spindle

Turning the spindle moves the plunger relative to the

pressure cylinder.

Clockwise

The plunger is driven "into"

the cylinder.

Counterclockwise

The plunger is retracted

"from" the cylinder.

Sensor

Mounting Ports

Spindle

Reservoir

P0Selector

Valve

System description

6904A_002-716e-12.17 Page 7

3.3 Sensor mounting ports

The pressure generator has three sensor mounting ports.

The mounting ports accept shoulder-sealing sensors and

calibration adapters with M14x1,25 mounting threads.

3.4 Mounting seal configuration

Each of the mounting ports is fitted with a seal assembly

as shown below. The pressure generator is also supplied

with three spare seal sets (items 2, 3 and 4):

5 Blanking plug

4 Conical ring

3 Seal ring

2 O-ring

Pressure generator Type 6904A1

Page 8 6904A_002-716e-12.17

4. Installation and commissioning

4.1 Mounting the pressure generator

The pressure generator should be mounted onto a sturdy

workbench or table. It is, furthermore, recommended to

have a non-porous working surface to simplify cleaning in

the event of any spillage.

The base plate can be bolted onto the workbench via four

8mm holes, or clamped using the two provided bench

clamps. The bench clamps are inserted into the base

plate as shown below:

Take note that only the rear section of the clamp should

be in contact with the underside of the workbench. The

workbench should not be in contact with the thread or

front section of the bench clamps.

Correct mounting

Incorrect mounting

Installation and commissioning

6904A_002-716e-12.17 Page 9

4.2 Fitting the lever arms

Mount the three lever arms into the spindle as shown

below. The threaded holes for mounting the lever arms

are drilled at an angle of about 25 °, i.e. hold the lever

arm at a slight incline when assembling.

4.3 Check sensor mounting ports

Ensure that the mounting ports are clean before filling

and using the pressure generator.

 Remove the three blanking plugs

 If required, use clean compressed air to remove any

possible debris from the port’s seal surface and

internal thread.

 Also ensure that each of the mounting ports is fitted

with a seal assembly as shown section 3.4

 Re-insert blanking plugs (tighten to 25 N·m).

Pressure generator Type 6904A1

Page 10 6904A_002-716e-12.17

4.4 Filling the fluid reservoir

The reservoir must be filled with the supplied calibration

fluid. (Refer to section 6.3 for more information)

 Unscrew the knurled retainer knob and remove the

reservoir lid

 Carefully pour some of the supplied calibration fluid

into the reservoir. Do not fill to the brim, the reservoir

should be about "half-full"

 Refit the reservoir lid and tighten the retainer knob.

4.5 Purging the system

It is recommended to purge the system prior to

conducting the first calibration. This serves to expel any

air that may be trapped in pressure generator’s cylinder/

plunger mechanism.

 Set the selector valve to position 0

 Turn the spindle counter clockwise until the plunger is

fully retracted, i.e. it reaches its end stop

 Turn the spindle clockwise until it reaches the

opposite end stop.

Operation

6904A_002-716e-12.17 Page 11

25 N.m

KISTLER

UUT

Reference

5. Operation

5.1 Mounting sensors

Ensure that the selector valve is set to

position P before removing any

blanking plugs or sensors.

This will prevent fluid from flowing from

the open mounting port

5.1.1 Reference sensor

It is recommended to mount the reference sensor in one

of the horizontal sensor mounting ports.

 Mount the reference sensor using the torque and

tools, as specified in its respective data sheet or

instruction manual

 Purge the system, as described in section 4.5

5.1.2 Unit under test

It is recommended to mount the Unit Under Test (UUT) in

the vertical sensor mounting port on the top-side of the

pressure generator.

Mount the UUT as specified, ie. Using its respective

mounting adapter, seals, tools and mounting torque. If

not specified otherwise, calibration adapters should be

mounted with a tightening torque of 25 N·m.

It is generally recommend to:

 First mount the calibration adapter onto the pressure

generator

 then mount the UUT into the calibration adaptor

Pressure generator Type 6904A1

Page 12 6904A_002-716e-12.17

5.2 Priming

Priming fills the cylinder with calibration fluid prior to

applying pressure.

 Set the selector valve to position 0

 Turn the spindle counter clockwise until the plunger is

at, at least, mid-stroke, i.e. the indicator rod shows 5

grooves (or less).

5.3 Pressure application

 Set the selector valve to position P

 Turn the spindle clockwise to increase pressure

 Turn the spindle counter clockwise to decrease

pressure

Appendix

6904A_002-716e-12.17 Page 13

6. Appendix

6.1 Dimensions

Pressure generator Type 6904A1

Page 14 6904A_002-716e-12.17

6.2 Spare parts

Blanking plug

18009802

O-ring

65007534

Seal ring

65000489

Conical seal ring

65000493

Calibration fluid

1057

6.3 Additional equipment

6935A2

Calibration manifold (6x M14x1.25, 230V)

18006816

6935A4

Calibration manifold (6x M14x1.25, 115V)

18006817

Z18553-701

Connection tube (6904A1 to 6935A)

18009804

1055

Calibration fluid - High temperature

18000007

Appendix

6904A_002-716e-12.17 Page 15

6.4 Calibration fluid

The type 6904A pressure generator has been

designed for use with calibration fluid types

1055/1057. The calibration fluids are based on a

commercial heat transfer fluid called Syltherm1 800.

The heat transfer fluid is filtered and passed through

a distillation process prior to bottling.

Type 1057

The calibration fluid Type 1057 supplied with the

6904A1 is intended for applications at and around

room temperature.

Type 1055

Please use calibration fluid type 1055 for high-

temperature applications, e.g. where the pressure

generator is used in combination with a Type 6935A

high temperature calibration manifold (Type 1055 is

supplied with the Type 6935A)

Do not discard old calibration fluid in

the municipal

trash, into sewers, on the ground or into any body of

water. Disposal must be in compliance with local laws

and regulation

Please refer to the material safety data sheet for

Syltherm 800, which

can be downloaded from the

DOW/Dow Corning websites.

1 Syltherm is a trademark of the Dow Corning

Corporation

Kistler 6904A1 Owner's manual

Brand: Kistler

Model: 6904A1

Type: Owner's manual

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Kistler 6904A1 Owner's manual

Kistler 6904A1 Owner's manual

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