A pendulum resting on a coating surface is set into oscillation and the time for the oscillation amplitude to decrease by an amount specified in this International Standard is measured. The shorter the damping time, the lower the hardness. Two test procedures are considered in some detail, namely those of König and Persoz. The Persoz and König methods differ by the period and amplitude of the oscillation. The Persoz test measures the time taken for the amplitude of oscillation to decrease from 12 to 4 ; the König from 6 to 3 . The instruments embody the same principle that the amplitude of oscillation of a pendulum touching a surface decreases more rapidly the softer the surface but differ in respect of dimensions, period and amplitude of oscillation. Our Pendulum Hardness Testers can be used in accordance with the following National and International Standards: ISO 1522 (which supersedes ASTM D4355); BS 3900-E5; DIN 53157; NBN T22-105; NF T30-016. We offer three different models: Persoz (BGD 509/P), König (BGD 509/K), and König & Persoz combined (BGD 509K&P).
ISO 1522 (which supersedes ASTM D4355)
Automatic counter range 0-999 times
High precision machined pendulums are good stable, ensure a repeatable and comparable testing result.
Suitable to different thickness substrates from 0.3mm~6.0mm
User friendly LCD Operator Interface
Release Pendulum with shutter release, can get more accuracy test result.
Lifting platform designed specially can fix specimen easily, platform can keep stable and no shake when pendulum is oscillating.
Spirit levels produced specially have high precision, convenient customer to adjust level precisely.
Can record automatically the time or times for the amplitude of swing to decrease from one angle to other angle and stop testing automatically.
Record the data with two light sensitive sensors
Can select record modes freely: Timing mode or counting mode.
Single piece glass enclosure reduces the effects of air flow on final results.