Zehntner ZHS 2090 User manual

Zehntner GmbH
Testing Instruments
Gewerbestrasse 4
CH-4450 Sissach
Switzerland
Tel [phone]
Fax [phone]
[email protected]
www.zehntner.com
last update: 12.01.2006 page 1
Instruction manual
Version 3.6 from 12.01.2006
ZSH 2090
Pencil hardness tester

Introduction ZSH 2090 Instruction manual Version 3.6
page 2 last update: 12.01.2006
Index
Exclusion of liability.............................................................................................2
1. Safety notes..................................................................................................3
1.1 Dangers.................................................................................................3
1.2 Safety notes........................................................................................... 3
2. Delivery of device ........................................................................................4
2.1 Damages during carriage ......................................................................4
2.2 Extent of delivery................................................................................... 4
2.3 Optional accessories .............................................................................4
3. Preliminaries ................................................................................................5
3.1 Pencils...................................................................................................5
3.2 Inserting the pencils...............................................................................6
4. Test procedures...........................................................................................7
5. Determining the degree of hardness.......................................................... 8
6. Table with the degree of hardness............................................................. 8
7. Technical data..............................................................................................9
Exclusion of liability
The figures and descriptions as well as the technical data correspond to
the present operating instructions at the time of printing. Changes of any
type, resulting from technical progress, modified design or similar, are
reserved.
The operating instructions have been prepared with the greatest care.
Nevertheless, errors cannot be completely excluded. The manufacturer
cannot be made liable for any errors in these operating instructions and
possible damage resulting from these.
The manufacturer is always grateful for suggestions, proposals for
improvement and indications of errors.
© Zehntner GmbH Testing Instruments

Version 3.6 ZSH 2090 Instruction manual General
last update: 12.01.2006 page 3
1. Safety notes
1.1 Dangers
Attention!
This note is included in this instruction manual wherever it is warned
about dangers which will arise to life and limb of persons if the
apparatus is handled improperly. Observe these notes and be
particularly careful in these cases. Also inform other users on all safety
notes. Besides the notes in these instruction manual the generally
applicable safety instructions and regulations for prevention of accidents
have to be taken into account.
Caution
This note comprises instructions to be observed in order to comply with
guidelines, instructions, notes and the proper procedure of the work,
and to avoid damaging or destruction of the apparatus.
1.2 Safety notes
The ZSH 2090 is exclusively intended for the determination of the
scratch hardness. Any other application is not in accordance with
the regulations. For damages resulting thereof the manufacturer is
not liable; the risk for this is taken by the user alone.
Avoid any mode of operation that could affect the security working
with the ZSH 2090. Especially the determination of the scratch
hardness must take place as described in this operating manual.
Only spare parts provided by the manufacturer may be used. When
using other than by Zehntner provided parts with the ZSH 2090,
Zehntner may not be hold responsible for defects or damages.
Reconstruction without permission and modifications of the
ZSH 2090 are not permitted. The warranty expires therewith. For
damages resulting thereof the manufacturer is not liable; the risk for
this is taken by the user alone.

General ZSH 2090 Instruction manual Version 3.6
page 4 last update: 12.01.2006
2. Delivery of device
2.1 Damages during carriage
During carriage the ZSH 2090 is to be handled with the usual care. To
ensure carriage without damages the device is to be transported in the
original packaging and under normal freight conditions. Pushes during
carriage are to be avoided.
At the destination take out the device of the packaging and check
immediately for any damages from the transport; if there are any
damages your authorized ZEHNTNER trader or Zehntner GmbH
Testing Instruments directly should be informed immediately.
2.2 Extent of delivery
The following parts are included in the delivery:
•1 pencil-hardness-tester
•1 set pencils of 17 hardness degrees (6B to 9H)
•1 sharpener for releasing cylindrically the lead
•1 pencil holder
•1 set emery paper No. 400
•1 carrying case
2.3 Optional accessories
•ZKZ 013 calibration and certification (incl. certificate)

Version 3.6 ZSH 2090 Instruction manual Operate
3. Preliminaries
3.1 Pencils
•Remove the wood on a length of approximately 5-6 mm from the pencil, make
sure not to damage the lead.
•Rub the lead against the emery paper (No.400) maintaining an exact angle of
90° to the paper until a flat circular surface is obtained.
•Repeat this procedure with the pencil after each test.
By aid of the sharpener for releasing cylindrically the lead, the wood can be
removed from the pencil and by doing that take care of not damaging the lead:
•Sharpen the pencil carefully (as with a normal sharpener).
•The remaining wood can be removed by a fingernail.
•Rub the lead against emery paper (as described above)
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Operate ZSH 2090 Instruction manual Version 3.6
3.2 Inserting the pencils
Insert the pencils in the hardness tester as follows:
•Place the instrument with the wheels upwards onto its front end.
•Insert the pencil in this way, that the lead touches the surface.
•Fasten the pencil with the clamping knob.
page 6 last update: 12.01.2006

Version 3.6 ZSH 2090 Instruction manual Operate
4. Test procedures
Test has to be done under laboratory conditions.
In the different standards, the test is carried out differently. Here, the procedure is
described when starting with a hard pencil or lead.
Please note that the procedure might have to be carried out in the reverse order
of succession!
•Start testing with a hard pencil.
•Place the instrument on the level test surface.
•Hold the instrument by the wheel hubs and push forward at a speed of
5-10 cm/s for a distance of at least 7 mm (cf. arrow).
•Examine the test surface with the naked eye for indentation or scratching.
•Repeat the process down the hardness scale until a pencil is found that will
not cut the film to the substrate (either metal or a previous coat) for a distance
of at least 3 mm.
•Continue the process until a pencil is found that will neither cut nor scratch the
surface of the film (any defacement other than a cut or gouge is considered a
scratch.
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Operate ZSH 2090 Instruction manual Version 3.6
5. Determining the degree of hardness
Record each end point for gouge and scratch hardness. With some films, the two
end points will be identical.
gouge hardness: The degree of hardness of the hardest pencil that will
leave the film uncut for a stroke length of at least 3 mm.
scratch hardness:
(pencil hardness) The hardest pencil that will not rupture or scratch the film.
Wolff-Wilborn
hardness: The degree of hardness of the softest pencil which damages the surface.
Please mention in your test report which standard the measurement results
refer to.
6. Table with the degree of hardness
The following degrees of hardness are available:
6B 5B 4B 3B 2B B HB F H 2H 3H 4H 5H 6H 7H 8H 9H
softer harder
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Version 3.6 ZSH 2090 Instruction manual Technical data
last update: 12.01.2006 page 9
7. Technical data
Material: steel
Dimensions: 110 mm x 80 mm x 58 mm (LxWxH)
Weight: 2,1 kg net
2,7 kg incl. accessories
Standards: ISO 15184, EN 13523-4, ASTM D 3363, NEN 5350,
SIS 184187, SNV 37113, ECCA-T 4, MIL C 27 227
Warranty: 2 years guarantee