M&A HM-6561 User Manual - page 3
Please note: If the measurement error comes within the range of
accuracy specification, please do not make calibration easily.
6 Maintenance & Servicing
* After the impact device has been used for 1000--2000 times, please
use the nylon brush provided to clean the guide tube and impact body.
When cleaning the guide tube, unscrew the support ring first, then take
out the impact body, spiral the nylon brush in counter-clock direction into
the bottom of guide tube and take it out for 5 times, and then install the
impact body and support ring again.
* Release the impact body after use.
* Any lubricant is absolutely prohibited inside the impact device.
* When results from repeated testing on a standard hardness test block
are consistently higher than the actual hardness value, the Impact Body
is probably worn. In such a case, it is necessary to replace an impact
body.
11
Quick Start Guide
To quickly configure the tester and start taking
readings. Please follow the procedures below.
1. Preparation for work pieces to be tested
Thick, heavy, and solid workpieces are preferred for
testing whenever possible. the surface must be polished
and limited to Ra≤ 2µm. The light workpiece to be
tested should be fixed to a bearing or support to avoid
bending, deformation, and displacement during testing.
2. Operation of the tester
2.1 Fit batteries
Install batteries paying careful attention to polarity.
2.2 Power on
Press the POWER/MENU key to power the tester on.
2.3 Set Impact Direction by press DIR/SHIFT key
2.4 Select a material code See Part 4.3
2.5 Select a hardness scale See part 4.4
2.6 Place the tester onto the surface to be measured
2.7 Load
2.8 Release
Notes:
1. Never try to let tester strike any tungsten steel or harder
materials. Otherwise the impact body will be damaged
forever.
2. Under no circumstances should you press the release
button if the tester was not against the work piece.
Otherwise the support ring would be loose easily.