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 BGD 509/S Pendulum Hardness Tester is the newest product which can be used in accordance with the following National and International Standards: ISO 1522, ASTM D4366，BS 3900-E5，DIN 53157，NBN T22-105，NF T30-016. It’s a simple to use instrument and can be supplied in one of three model types: Persoz, König, and Persoz and König combined.
Standards
ISO 1522
ASTM D4366
BS 3900-E5
DIN 53157
NBN T22-105
NF T30-016
Technical Specification
Large capacitive touch screen displays various testing parameters, environment temperature, and humidity, with rich and intuitive content
One-button automatic test start, moving the pendulum to the release position, clamping test panels, and completing the test automatically. High degree of automation, simpler operation, completely eliminating errors caused by human operation
Uniquely designed automatic lifting working platform, which can automatically clamp the test panel in 3 seconds and continuously provide at least 25N of clamping force, with stable platform without shaking when the pendulum swings
High-precision pendulum machined with precision mechanical processing, strong stability, ensuring the reproducibility and comparability of test data, comparable to similar imported products
Overall lift-up organic glass door cover, convenient operation, greatly increasing the operation space, while reducing data deviations caused by air circulation. The unidirectional resistance design prevents the instrument from being impacted when the door cover closes instantly
Two switchable test methods: K pendulum (König) or P pendulum (Persoz)
Electromagnet used to release the pendulum for more precise test results
Built-in high-precision horizontal inclinometer with an accuracy of 0.05°, allowing customers to directly observe the horizontal deviation on the touch screen for easy and quick adjustment
Automatic counting and real-time display of test timing and counting, automatically stopping the test when the deviation reaches as low as 3° (König) or 4° (Persoz), while calculating the test period
Historical test data viewing for easy data comparison by customers
Suitable for test plates of different thicknesses ranging from 0.1mm to 5.5mm
