Manual
5
1.1.3
Notation of Leeb’s Hardness
When measuring the hardness of a sample material using the traditional static hardness testing method,
a change of applied pressure will result in a change in the hardness reading. This will also happen during
a Leeb’s Hardness test when one changes the impact device. In hardness measurement of the same test
sample with different impact devices, the Leeb’s hardness values obtained will vary.
For example: 720HLD≠720HLC
Because different converting curves are obtained from different impact devices, when converting
hardness HL into different hardness values, the notation for the converted hardness value should include
the impact device used.
For example:
Hardness HRC converted from hardness L using impact device D should be written as 35, 9 HRCLD.
Where: 35=Hardness value HL
9=Hardness value HRC
L=Leeb’s Method
D=Impact device
2
Safety information
Please, read this user's handbook carefully and completely, before you put it into service for the first time.
The device may only be used by carefully trained staff. We do not assume any liability for damage and
injuries caused by non-observance of this manual.
- This meter must only be used in the way described in this manual. If used otherwise, this can lead to
dangerous situations for the user or damage / destruction of the device.
- The device may only be used in the specified temperature / humidity range. Do not expose it to extreme
temperatures, direct sunlight, extreme air humidity or moisture.
- Never use the device when your hands are wet.
-
The case should only be opened by qualified personnel of PCE Instruments.
- The instrument should never be placed with the user interface facing an object (e.g. keyboard side on a
table).
- You should not make any technical changes to the device.
- The appliance should only be cleaned with a damp cloth / use only pH-neutral cleaner, no abrasives or
solvents.
- The device must only be used with original PCE spare parts or equivalent.
- Do not use the meter in explosive atmospheres.
- When the battery is flat (battery level indicator), please do not use the device anymore as false readings
can cause life-threatening situations. You can carry on with your measurement after inserting new
batteries.
- Before each use, check the device by measuring a known factor.
- The limit values for the measuring variables stated in the specifications must under no circumstances be
exceeded.
- When not using the device for a longer period of time, please remove the batteries to avoid damage due
to battery leakage.
This user's handbook is published from PCE Instruments without any guarantee.
We expressly point to our general guarantee terms which can be found in our general terms of business.
If you have any questions please contact PCE Instruments.
