EN 1426 – ASTM D 5 – AASHTO T49 – GOST 11501-78
Apparatus for determination of the needle penetration.
At this the path a standard needle penetrates in the sample under standardized conditions (load, time, temperature) is measured.
The penetration depth of the needle is determined with an electronic measuring system, which is separated from the plunger during the test. This and the free guidance of the plunger the influence to load and friction is virtually eliminated. Before each start of the test the measuring system automatically referenced, then the penetration needle moved up to the sample with an electric drive, which is moved by finely adjustable joystick (an ultra-bright LED lamp included). Then the plunger is approved by an automatic device and blocked again after the testing period. The test result is displayed on the digital display. The plunger can easily be removed to calibrate its weight.
- Measuring range: 0-400 penetration units (equivalent to 0-40mm)
- Resolution: 0.01 mm
- Test load: 100g (plunger 97.5 g + 2.5 g penetration needle)
- Test time free adjustable from 001 seconds)
Accessories (penetration needle 20-20711, preheating bath …) are also required to carry out the test.