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MULTI GRIT TESTER - VDA/SAE

Model Number: 508

Purpose and Application
The MULTI GRIT TESTER 508 VDA is a stone hammer blow testing instrument that at first was
developed in co-operation with the "Verband der Automobilindustrie (VDA)" (Association of the
Automotive Industry) but now also meets the specifications of national and international standards.
The MULTI GRIT TESTER 508 VDA is used to assess the ability of single and multiple layers of
paints and similar coating materials to stand up to the impacts caused by small bodies of low mass hitting
the specimen at high speed as experienced on road and rail vehicles and other equipment used in the
transport field.

The new MULTI GRIT TESTER 508 SAE is a stone hammer blow testing instrument equipped with an
adjustable impact angle, contrary to the execution of VDA.

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INDUSTRY: Paint & Powder Coating Industry

APPLICATION: Coating Inspection

The MULTI GRIT TESTER 508 VDA is a multi-blow test instrument of high precision, and its special
feature is the good repeatability and comparability of the test results obtained. The specimen is subjected to impacts by sharp-edged steel shot accelerated by compressed air. An air accumulator in the system eliminates effects of momentary pressure variations in the external compressed air supply. The shot is entered automatically using an adjustable vibratory feed. On a multifunctional display the working
pressure, the duration of the test, the setting of the vibratory feed and the number of tests conducted
(total / temporary) can be read off alternatively. To facilitate working with the MULTI GRIT TESTER
508 VDA the instrument is available - upon request.
with a pneumatic specimen applying device.

The MULTI GRIT TESTER 508 SAE features, like
the VDA version, a good repeatability and reproducibility of the test results. The bombardment
of the test panels is carried out with determinate grit (according to ASTM D 3170) which is accelerated by
compressed air. Dependent of the specifications of further standards (mostly of car manufacturers) other
shot materials can be used, too.
The shot is entered automatically using an adjustable vibratory feed.
On a multifunctional display the working pressure, the duration of the test, the setting of the vibratory feed and the number of tests conducted (total / temporary) can be read off alternatively.
An air accumulator in the system eliminates effects of momentary pressure variations in the external
compressed air supply.

Leaflet

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