Mecmesin Vortex Operating Instructions Manual page 8

Setting-up Top-loading (if
required
Operation of Mounting
Tables
page 6
Fine adjustments can subsequently be made by slackening the
central adjuster knob (C), raising / lowering the transducer
holding plate and carriage (D) and re-tightening.
Some testing applications require torque to be measured while
axial top-load is being applied to the specimen. Testing a
'push-and-twist' child-resistant closure according to ASTM
D3475 would be one example of such an application.
Ensure the central adjuster knob (C) is tightened sufficiently, and
add appropriate weight(s), up to 5kg, to loading dish (A).
Slacken off the central adjuster knob, while supporting the static
torque transducer and upper gripping fixture (not illustrated),
gently lower until this engages with the specimen and tighten
the upper mounting table grip, if necessary. Do not re-tighten
the central adjuster knob.
The upper and lower mounting tables have been designed to
accommodate samples with a wide range of sizes, shapes and
symmetries. It is however necessary to avoid over-tightening
these fixtures such that the cap sample is distorted significantly.
Optimum results can be obtained for critical applications by
using a mandrel dedicated for use with each particular design
of cap, see (a) for example.