The Pendulum Tester should be verified at the start of each day of testing, as well as after re-assembly/transportation. The verification procedure is a very important part of the slip testing process. It demonstrates to you, and all those making use of your results, that the instrument has been correctly set-up and is functioning properly.
Verification is achieved by performing pendulum tests on a set of standard surfaces with known PTVs. These are given in the table below:
If the values given in the table are not obtained during the verification procedure, you must not proceed with testing. The pendulum setup procedure (including slider conditioning) should be re-performed, and rubber sliders checked for defects. If you continue to experience difficulties verifying your instrument, please contact us for further assistance.
References & Further Reading
We recommend that all Pendulum users purchase a copy of the UK Slip Resistance Group Guidelines (see reference below).
UK Slip Resistance Group, The UK Slip Resistance Guidelines, Issue 4.0,UKSRG (2016)
- Available to purchase here
Please also refer to the specific British or International Standard to which you are testing. Minor variations in the verification procedure are present in some standards.