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version 3.8 

ZSH 2090 instruction manual 

General

 

 

last update: 24.07.2015 

page 3 

 

Exclusion of liability  

 

The features described in this instruction manual represent the complete 
technology of this instrument. These features are either included in the 
standard delivery or available as options at additional costs. 

 

Illustrations, descriptions as well as the technical specifications conform to 
the instruction manual in hand at the time of publishing or printing. 
However, Zehntner GmbH Testing Instruments policy is one of continuous 
product development. All changes resulting from technical progress, 
modified construction or similar are reserved without obligation for 
Zehntner to update this manual. 

 

Some of the images shown in this instruction manual are of a pre-
production model and/or are computer generated; therefore the 
design/features on the final version of this instrument may differ in various 
aspects. 

 

This instruction manual has been drafted with the utmost care. 
Nevertheless, errors cannot be entirely excluded. The manufacturer will 
not be liable for errors in this instruction manual or damages resulting 
from any errors. 

 

The manufacturer will be grateful at any time for suggestions, proposals 
for improvement and references to errors. 

 

© Zehntner GmbH Testing Instruments 
 
 
 

1. 

Description of device 

 

 

 

The ZSH 2090 is a h

ardness tester according to Wolff-Wilborn for 

determination of resistance of coatings to mechanical stress by pencils of 
different hardness

 

The following features distinguish the ZSH 2090: 

 

Easy to handle 

 

Reliable results 

 

No maintenance required 

 

Summary of Contents for ZSH 2090

Page 1: ...werbestrasse 4 CH 4450 Sissach Switzerland Tel 41 0 61 953 05 50 Fax 41 0 61 953 05 51 zehntner zehntner com www zehntner com last update 24 07 2015 page 1 Instruction manual version 3 8 dated 24 07 2...

Page 2: ...gers 4 2 2 Notes regarding safety at work 4 3 Delivery of device 5 3 1 Damages during carriage 5 3 2 Standard delivery 6 3 3 Options 6 4 Preliminaries 7 4 1 Pencil preparation 7 4 2 Inserting the penc...

Page 3: ...this manual Some of the images shown in this instruction manual are of a pre production model and or are computer generated therefore the design features on the final version of this instrument may di...

Page 4: ...manual completely In particular the safety precautions and warnings The ZSH 2090 is exclusively designed for the determination of the scratch hardness Any other application is not in accordance with t...

Page 5: ...suspect by your visual impression that damage has occurred make a note of the suspected damage on the delivery receipt or freight papers and get the carrier to sign it Moreover the forwarding agent co...

Page 6: ...to 9H 1 sharpener for releasing cylindrically the lead 1 pencil holder 1 set emery paper No 400 1 certificate of manufacturer 1 carrying case 3 3 Options ACC601 calibration and certification incl cer...

Page 7: ...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 th...

Page 8: ...ate 24 07 2015 4 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 lea...

Page 9: ...ncil into the as described in chapter 4 2 Inserting the pencils on page 8 Place the ZSH 2090 on the coating under test The test surface needs to be flat Hold the instrument by the wheel hubs and push...

Page 10: ...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...

Page 11: ...n order to avoid damages 9 Technical specification Material hardness tester steel Material pencils wood and graphite Dimensions LxWxH 110 mm x 80 mm x 58 mm 4 33 x 3 15 x 2 28 Weight net approx 1 8 kg...

Page 12: ...ess degree 10 E Exclusion of liability 3 Extent of delivery 6 H Handling 9 Hardness determination 10 I Inserting the pencils 8 Instrument Description 3 Extent of delivery 6 L Liability 3 O Options 6 P...

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