10
3.1.7
Display
：
128
×
32 dot matrix LCD
；
3.1.8
Data memory
：
270 average data in 9 files
；
3.1.9
Upper and lower limit setting
：
same to measuring range
；
3.1.10
Power
：
AAA
（
7#
）
1.5V 2pc
；
3.1.11
Continual working time
：
about 150 hours
（
without backlight
）
；
3.1.12
Communication interface
：
USB2.0.
3.2 Dimension and weight
3.2.1
Dimension:155mm
×
55mm
×
25mm
3.2.2
Weight: about 166g.
4 Using
4.1 Preparation before using
4.1.1Preparation for sample surface
Preparation for sample surface should conform to the relative requirement in figure 3.
●
In the preparation process for sample surface, the hardness effect of being heated or cold processing on the
surface of sample should be avoided
；
●
Too big roughness of the measured surface could cause measure error. So, the measured surface must be
metallic luster, smoothing and polish, without oil stain
；
