Instruction
Manual
High-Pressure
Generator
Type 6906
002-171e-10.01
(B16.6906e)
002-171e-10.01 (B16.6906e) Page 1
Operating Instructions
High-Pressure Generator
Type 6906
Your authorized distributor:
High-Pressure Generator Type 6906
Page 2 002-171e-10.01 (B16.6906e)
Contents
002-171e-10.01 (B16.6906e) Page 3
Contents
1 Introduction ________________________________________________________________________ 4
2 Hints on the use of these Operating Instructions_________________________________________ 5
3 General description of the generator ___________________________________________________ 6
4 Operation __________________________________________________________________________ 8
4.1 Start-up________________________________________________________________________ 8
4.2 Safety note _____________________________________________________________________ 8
5 Operating errors, notes ______________________________________________________________ 9
5.1 Normal maintenance and oil check _________________________________________________ 9
5.2 Troubleshooting_________________________________________________________________ 9
5.3 Exchanging the packing _________________________________________________________ 10
6 Technical data _____________________________________________________________________ 11
6.1 Items included _________________________________________________________________ 11
6.2 Accessories ____________________________________________________________________ 11
7 Warranty__________________________________________________________________________ 12
High-Pressure Generator Type 6906
Page 4 002-171e-10.01 (B16.6906e)
1 Introduction
By choosing this kISTLER quality product, you have de-
cided in favor of precision, long service life and technical
innovation.
Please read through these operating instructions carefully,
so that you will be able to use the versatile properties of
your new high-pressure generator to the best advantage.
kISTLER offers a wide range of measuring instruments
and total solutions:
• Quartz crystal sensors for the measurement of force,
pressure, acceleration, shock and vibration
• Associated charge amplifiers and charge calibrators
• Electronic control, display and evaluation units
• Piezoresistive pressure sensors and transmitters with
associated measuring amplifiers
kISTLER also designs entire measuring systems for special
applications, for example in the automobile industry, in
plastics processing and in biomechanics.
Our general catalogue gives an overview of our product
range. Detailed data sheets are available for practically all
products.
If there are particular questions which you still want to
raise after studying these instructions, the world-wide
kISTLER customer service is available to you, and is also
competent to advise you on problems in particular applica-
tions.
Hints on the use of these Operating Instructions
002-171e-10.01 (B16.6906e) Page 5
2 Hints on the use of these Operating
Instructions
These instructions describe the High-Pressure Generator
Type 6906.
We recommend you to read the entire operating instruc-
tions carefully. However, if you are in a hurry and already
have experience with kISTLER high-pressure generators,
you can confine yourself to reading the specific informa-
tion needed.
We have attempted to give these instructions a neat layout
to make it easier for you to gain direct access to the infor-
mation you need.
Please keep these operating instructions in a safe place
where you can retrieve them at any time.
If you lose these instructions, please contact your kISTLER
customer service representatives and ask them for an im-
mediate replacement.
All details and information in these instructions are subject
to changes involving technological progress at any time
without prior notification.
High-Pressure Generator Type 6906
Page 6 002-171e-10.01 (B16.6906e)
3 General description of the generator
Portable pressure generator for calibrating pressure sensors
with a pressure range of 500 ... 10,000 bar. Together with
the reference sensors and evaluation units offered by Ki-
stler, complete calibration systems can be assembled for
calibrating piezoresistive and piezoelectric pressure sensors.
The hydraulic pressure generator allows extremely high
pressures of up to 10,000 bar to be generated.
The pressure created can be maintained for a lengthy pe-
riod of time, and it can therefore also be used for static
calibrations.
For safety reasons, the pressure generator is equipped with
a protective swiveling hood.
Fig. 1b
Fig. 1a
Fig. 1a: Pressure generator with protective hood open and built-in sensors
Fig. 1b: Pressure generator with protective hood closed and built-in sensors
General description of the generator
002-171e-10.01 (B16.6906e) Page 7
Fig. 2: Dimensions of the pressure generator Type 6906
High-Pressure Generator Type 6906
Page 8 002-171e-10.01 (B16.6906e)
4 Operation
4.1 Start-up
1. Screw the generator to the workbench with the screw
clamps supplied.
2. Screw on the rotary lever.
3. Remove the stoppers, open the stop valve and move
the pressure piston against the limit stop by rotating the
spindle clockwise.
4. Add Type 1053 oil up to the mark in the sight glass.
Close the stop valve.
5. Screw the sensor to be calibrated into the adapter (e.g.
Type 69... / 79...) with the prescribed torque. Using a
syringe, fill the holes of the adapter with oil. Also fill the
adapter of the reference sensor with oil. Screw in the
two adapters and tighten them lightly by hand.
6. Open the stop valve. Suck in oil by rotating the spindle
back to the limit stop. Close the stop valve.
7. Loosen one adapter slightly and rotate the spindle to
vent the pressure around the hole. Small air bubbles are
expelled at the adapter thread. Continue until only oil
appears. Open the stop valve and tighten the adapter
with a torque of 10 Nm. Then bleed the air from the
second adapter.
8. The pressure generator is now ready to operate.
Attention:
In order to prevent an OVERLOAD on the built-in sensors,
ensure that the charge amplifiers and evaluation units con-
nected are correctly connected, adjusted and switched to
OPERATE.
• When operating with 6907B1:
Increase the pressure only until the maximum value se-
lected in the Type 6907B... calibrator. is reached.
• Pressure sensors with a pressure range <500bar must
not be calibrated with the pressure generator, since the
danger of an OVERLOAD is too great.
4.2 Safety note
The pressure generator can generate extremely high pres-
sures. It must therefore be operated only with the protec-
tive hood closed.
Operating errors, notes
002-171e-10.01 (B16.6906e) Page 9
5 Operating errors, notes
5.1 Normal maintenance and oil check
• No lubrication of the bearings is necessary.
• Check the oil level before using the generator.
• Top up the oil level if it falls below the mark.
Note:
Please use only special high pressure oil Type 1053, other-
wise fault-free operation cannot be guaranteed.
5.2 Troubleshooting
If the required pressure is not obtained or if it drops sud-
denly, this may have the following causes:
Air in the pressure system
Rectify by bleeding the air from the system:
1. Open the stop valve (Pos.O) and rotate the spindle
anti-clockwise.
2. Close the stop valve (Pos. P), loosen the adapter (do
not screw out completely) and turn the spindle clock-
wise until the trapped air has been expelled. Retighten
the adapter with 10 Nm torque.
3. Open the stop valve (Pos.O) and rotate the spindle
anti-clockwise to suck in oil.
4. Repeat this procedure with the second adapter hole.
Adapter or sensor tightened insufficiently or are leaking
• Check the sensor mounting in the adapter (seal, tight-
ening torque); screw in the adapter using 10 Nm
torque.
Piston packing defective or not leak-tight
A defective piston packing can usually be recognized by oil
coming out of the union nut. The generator does not need
to be returned for the packing to be exchanged.
High-Pressure Generator Type 6906
Page 10 002-171e-10.01 (B16.6906e)
5.3 Exchanging the packing
Procedure for exchanging the packing:
1. Loosen the union nut (6) clockwise until about 5 mm of
thread is visible.
2. Generate pressure by rotating the spindle clockwise so
that the packing is pushed out of the pressure tube.
3. As soon as the spindle turns noticeably more easily, un-
screw the union nut (6) fully. Slide the spindle bearing
(7) to the rear.
4. Pull the packing (8) from the pressure rod and push on
the new packing in the same sequence.
5. Push back the spindle bearing (7) and screw on the un-
ion nut (6). Lightly tighten the union nut with the pin
wrench.
6
8
7
8
Packing Type 1100A15
Technical data
002-171e-10.01 (B16.6906e) Page 11
6 Technical data
Range bar 0 ... 10,000 bar
Piston diameter mm 6
Piston stroke mm 76
Stroke per spindle revolution mm 1.75
Swept volume cm3 2.14
Pressure transmission Oil Kistler Type 1053
Oil reservoir cm3 22
Weight kg 15
Sensor connections 2 x M10x1
(for adapter 69 ....)
Pressure loss bar/ min ≈ 0
(Depending on the volume of air enclosed, the pressure will at first fall slightly
before it stabilizes)
6.1 Items included
½ liter of special high-pressure oil Type 1053
1 tube of special grease Type 1063
1 pin wrench
2 screw clamps
6.2 Accessories
Packing set 1100A15
High-Pressure Generator Type 6906
Page 12 002-171e-10.01 (B16.6906e)
7 Warranty
Regarding the warranty reference is made to the agree-
ment between the respective contracting parties.
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