Product Manual

4
Precautions
The Clegg Impact Soil Tester has been designed to be easy-to-use and provide years of service. Though primarily used
outdoors in many types of situations, it is a scientific instrument incorporating specialized electronic components meaning
that due care is necessary to ensure trouble-free performance and avoid costly repairs. To prolong the use of the device,
observe the following precautions.
AVOID PROLONGED EXPOSURE TO EXTREME HEAT AND COLD
Do not leave the instrument in full sun or freezing temperatures when not in use. In conditions of extreme temperature, the
control unit may not activate. If this is suspected, allow the control unit to cool (or warm) before use.
EXTERNAL SIGNAL CABLE
Th cable can be damaged by being pinched, pulled, worn, or cut. Ensure that the connectors are not strained,
bent out of round or broken, and that the plugs and sockets are kept clean.
LOCKING THE HAMMER IN THE GUIDE TUBE (2.25 kg)
Always lock the hammer in the guide tube using the provided locking pin when instrument is not in use or
during transport.
KEEP CLEAN AND DRY
Keep all components clean and dry, not only for correct test operation but also for the sake of protecting the instrument.
When testing, do not allow material build-up inside the guide tube or on the hammer. Any build-up could prevent an
accurate free fall of the hammer. Ensure that the hammer strike face is clear of any material build-up before starting each
test. When transporting or storing the instrument, wipe down the hammer and guide tube, etc., so that all is dry and
relatively clean. Never apply water under pressure when cleaning.
HAMMER AND CONTROL UNIT ARE NOT WATERPROOF
Do not expose the hammer or control unit to rain. If moisture enters either the hammer or control unit, damage may result.
If moisture does enter the control unit, remove the rechargeable battery immediately and allow the circuitry to dry. Contact
Lafayette Instrument for repair.
DO NOT EXCEED MAXIMUM LIMITS
Overloading may cause permanent damage to the accelerometer. To best protect the Clegg, do not operate in such a manner
that values regularly exceed the device’s stated maximum limits. Maximum limits can be found in the Specifications table
on page 3 of this manual.
If the hardness of the material to be tested is uncertain, start with drops from a very low height, progressively getting higher
until it is determined that it is safe to drop from the standard drop height. If it is determined that the standard drop height
is too high, make note of what is considered to be a safe drop height for the particular situation and develop criteria for
such materials based on this lower drop height. Be aware that this output is not directly proportional with the output
WARNING: Only authorized personnel should perform disassembly and calibration.
Unauthorized disassembly or calibration will void any warranty.
Locking
pin