Table 4-1
Type of Impact
Device
Distance of center of the two
indentations
Distance of center of the
indentation to sample edge
Not less than (mm)
Not less than (mm)
D
、
DC
3 5
DL 3
5
D+15 3
5
G 4
8
E 3
5
C 2
4
4.5 Read Measured Value
After each impact operation, the LCD will display the current measured value, impact times plus
one, the buzzer would alert a long howl if the measured value is not within the valid range. When
reaching the presetting impact times, the buzzer will alert a long howl. After 2 seconds, the buzzer will
alert a short howl, and display the mean measured value.
4.6 Notification
z
Replacing the impact device must be done during Power off. Otherwise the main body could not
identify the type of the impact device, and it may damage the circuit board of the main body.
z
You could not save the current test value if the impact time is less than the presetting times value.
z
Only type D and type DC of impact device have the function of strength test option. You can not
change the setting to strength testing when using other types of impact device. The setting would
be set to hardness testing automatically after replacing the impact device whether the setting is
hardness testing or not before.
Not all materials could convert to all hardness scale value. The hardness scale is reset to HL
automatically after changing the material. So select material firstly before changing the hardness scale.
