Mitutoyo HM-200A Series - 7.2 When testing hardness

No. 99MBG127A
7-2
7.2 When testing hardness
Table 7-2
Symptom
Check point
Remedies
1
Indentation
not formed
1) Is the focus properly adjusted?
1) Adjust the focus properly.
2) Check if the tip of the indenter shaft is
cracked.
2) Replace the indenter if cracked.
3) Is the indentation position misaligned?
3) Align the indentation position.
2
The hardness
value is
abnormal.
1) Check if the indenter tip is cracked.
1) Replace the indenter with a new
one if cracked.
2) Is the indenter fixed correctly?
2) Make sure that the indenter is
precisely mounted and secured.
3) Is the indenter set correctly by the
analysis software?
3) Make sure that the setting by the
analysis software is matched with
that of the used indenter.
4) Is the testing environment appropriate?
4) Improve the testing environment.
3
Indentation
form is not
correct.
1) Is the indenter clean?
1) Wipe the indenter.
2) Check if the indenter tip is cracked.
2) Replace the indenter with a new
one if cracked.
3) Is the specimen surface coarse?
3) Polish the specimen surface.
4) Is the specimen tilted?
4) Parallelize between the specimen
surface and stage top surface.
5) Is the specimen curved surface
(spherical/cylindrical)?
5) Form an indentation on the apex
of the specimen curve.
4
No external
output
1) Is the external output set to OFF?
1) Set the external output to ON.
2) Are the connecting cables properly
connected?
2) Connect the connectors properly.