
Safety Features
14
LD Series Operation Manual
Grips and Adapters
We offer a complete line of grips and adapters to meet your specific needs. Each can be found on our website at
ametektest.com
with individual catalogs
and specifications included.
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Installing the Grips
When installing the heavy upper grips on the load cell, avoid bumping the eye end. If the grip is a close fit, DO NOT FORCE IT. Set, or re-set, the bottom limit
stop so the grips will not meet when the crosshead is lowered.
In both tension and compression tests, center the specimen in line with the axis of the load cell and the bottom fixed anchor pin to avoid side thrust.
Proper alignment of the test specimen.
Note:
In compression tests, care must be taken to avoid bringing the platens together or against solid specimens at high speed. Ensure that the lower cross-
head limit is set correctly. If a special lower fixture is used, ensure that it is fixed in position so that it does not block the normal downward movement
of the upper fixture.
Avoid overloading beyond the rated capacity of the load cell. Prior to testing ensure that the maximum force anticipated will not exceed the capacity of the
cell installed.
Lloyd Instruments load cells are built to exceed the standards as set out by ASTM, BS, DIN etc. Load cells on all models of LD Series machines are user-change-
able. Various capacities are available from 5N up to the capacity of the frame. While cells may be used below 10% of capacity, it is recommended to use a lower
force cell such that the test force will fall in the upper 90% of its range. This will give the best signal to noise performance of the load measuring system.
For some samples, the LD Series alone will not provide the most accurate strain analysis available. To increase accuracy, we suggest one of our many Lloyd
Instrument extensometers. Our extensometers can be added to an LD Series machine, and the results can be read by our Nexygen
Plus
software.
For details on our various extensometers, please visit our website at
ametektest.com.