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4.8 Replace the batteries
When the battery capacity runs out, the batteries should be replaced. The user should replace the
batteries following the program below:
Turn off the instrument.
Take off the battery compartment cover and take out the batteries.
Insert the new batteries.
Fasten the battery cover.
Turn on the instrument to check.
Warning:
Please pay much attention to the polarity of the battery during battery replacement.
Do not cast the battery into fire, disassemble or heat the battery. Otherwise battery leakage,
fire or even explosion may occur.
Please take out the batteries when not working during a long period of time.
4.9 Communication
The instrument is equipped with a USB port on upper left of the instrument.
The PC can be connected with the instrument via the USB cable.
Lift the rubber flaps to uncover the connection port.
Insert the mini-USB end of the USB cable into the USB socket on the upside of main body.
Insert the other end into the USB port of the computer.
After installing the DataPro software and the USB driver, you can download the stored test data from the
tester.
The DataPro software helps manage and format stored data for high-speed transfer to the PC. Data can
be printed or easily copied and pasted into word processing files and spreadsheets for further reporting
needs. New features include live screen capture mode and database tracking. Detailed information of
the communication software and its usage refer to the software manual.
5 Operation
Caution: Insufficient preparation of the test procedure may damage to the unit and/or the sample to be
measured.
Before each test procedure:
Clean if necessary.
Carry out performance check.
Check or change settings (impact device, impact direction, materials, scales, etc. ).
5.1 Preparation of the sample
Preparation for sample surface should conform to the relative requirement in the Appendix Table 3.
5.1.1 Weight and thickness of the test piece
Place specimens under 5kg on a solid base so that they cannot be moved or oscillate as a result of the
impact. Firmly couple specimens that weigh between 0.1-2kg to an immovable base, e.g. a heavy base
plate.
Despite the low mass of the impact body and low impact energy, a relatively large impact force of short
duration is generated when the impact body hits the measuring surface.
Impact device
types
Classification of samples
Max. Imp
act force
heavy
Medium-weight
Light-weight
D/DC, DL, E
More than 5.0 kg
2.0 – 5.0 kg
0.05 – 2.0 kg
900N≈90kgf
G
More than 15.0 kg
5.0 – 15.0 kg
0.50 – 5.0 kg
2500N≈250kgf
C
More than 1.5 kg
0.5 - 1.5 kg
0.02 – 0.5 kg
500N≈50kgf
For heavy samples of a compact shape, no particular precautions are necessary. Smaller and lighter
samples or workpieces yield or flex under this force, producing HL values which are too small and of
excessively large variation. Even with big or heavy workpieces, it is possible for thin wall regions or
thinner protruding parts to yield upon impact. Depending on the frequency of the resulting yielding action,
