Schmidt SHT Series, Instruction Manual

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3 Operating Procedure
3.1 Notices Before Starting Measurement
Have you read and understood the Operating Instructions, in particular Chap-
ter 1 „Basic Safety Notices“ ?
You are not permitted to operate the instrument before doing so.
Before working with the instrument you must put on your personal protective
clothing, if necessary. For example, eye protectors, gloves, etc.
3.2 Measuring with the Durometer
General information
The material to be tested must comply to the applicable standard. Use of other material
will lead to incorrect measurement results.
Example for Shore A hardness:
The material to be tested must be thicker than 6 mm. When testing thinner material, you
may need to place several samples on top of each other until a thickness of 6 mm is
reached. Each test sample has to be tested in at least three different points. The points
should be > 5 mm apart and > 13 mm away from the sample edges. The hardness reading
must be recorded 3 seconds after pressing down the housing. When testing material with
a significant tendency to yield, the value can be read after 15 seconds. The duration of the
measurement must be indicated in the test report. Two movable markers can be rotated
around the faceplate to mark any desired measuring range within the display range.
Measurement procedure
- Place the instrument vertical and shock-free on the material to be measured and press
the housing down, until the measuring face rests on the sample.
Any angle other than perpendicular may cause error.
- Record the reading after approx. 3 seconds.
The hardness scale covers a range from 0 to 100, where 0 corresponds to the minimum
and 100 to the maximum hardness value.
Each test sample has to be tested in at least three different points.
Scale
Housing
Measuring
face
Markers