Mitutoyo HM-200A Series - Wind, Sound

2. INSTALLATION
No. 99MBG127A
2-3
Table 2-1 Floor vibration/frequency, and acoustic vibration/frequency
Influences of floor vibrations upon test forces
Frequency of floor vibrations
Use conditions
Test force range: 0.4903 to 19.61 mN
Insulating material: Rubber insulator.
The accuracy is guaranteed as shown
below in the shaded portion of the graph:
0.4903mN ±40%
0.9807mN ±30%
1.961mN ±20%
2.942mN ±10%
4.903mN ±5%
9.807mN ±1.5%
19.61mN ±1.5%
Influences of acoustic vibrations upon test forces
Frequency of acoustic vibrations
Use conditions
Test force range: 0.4903 to 19.61 mN
The accuracy is guaranteed as shown
below in the shaded portion of the graph:
0.4903mN ±40%
0.9807mN ±30%
1.961mN ±20%
2.942mN ±10%
4.903mN ±5%
9.807mN ±1.5%
19.61mN ±1.5%
2.1.4 Wind, Sound
 Avoid a direct air flow from the air conditioner toward the hardness testing machine.
 Avoid a place where internal air circulation is extreme.
 Try not to select a place closer to the doorway. (Subject to wind, vibration)
 Avoid installing the hardness testing machine closer to the instrument which
generates sound. (Acoustic vibration: Phones, speakers)
 The speeches from the phones or speakers may adversely affect the test results.
Acoustic vibrations
80
60
70
100
300
500
700
(Hz)
(dB)
Not insulated
Insulated
Floor vibrations
2.0
0.5
1.0
10
20
30
40
50
(Hz)
(gal)