Hitachi S-4800 manual Oscillation Allowable Amplitude X, Y, ∝m Peak to Peak

(4)Floor vibration

S-4800 Type I

Oscillation	Allowable Amplitude (X, Y)
Frequency	(∝m Peak to Peak)
(Hz)
1.0	Less than 7.0
1.4	Less than 2.0
2.0	Less than 2.0
3.0	Less than 4.0
4.0	Less than 4.5
5.0	Less than 4.5
6.0	Less than 4.0
10.0	Less than 3.0

Oscillation	Allowable Amplitude (Z)
Frequency	(∝m Peak to Peak)
(Hz)
1.0	Less than 25.0
2.0	Less than 14.0
3.0	Less than 5.0
3.5	Less than 2.9
4.0	Less than 1.8
5.0	Less than 1.0
6.0	Less than 1.1
10.0	Less than 1.2

S-4800 Type II

Oscillation	Allowable Amplitude (X, Y)
Frequency	(∝m Peak to Peak)
(Hz)
1.0	Less than 8.0
1.5	Less than 3.0
2.0	Less than 1.4
2.4	Less than 1.4
3.0	Less than 3.0
5.0	Less than 4.0
6.0	Less than 3.5
10.0	Less than 3.5

Oscillation	Allowable Amplitude (Z)
Frequency	(∝m Peak to Peak)
(Hz)
1.0	Less than 20.0
2.0	Less than 10.0
3.0	Less than 5.0
4.0	Less than 2.7
5.0	Less than 1.8
6.0	Less than 1.0
7.0	Less than 1.0
10.0	Less than 1.0

The allowable amplitude corresponds to an image deviation of less than 0.2 mm on a micrograph at magnification 220,000×

(5)Acoustic noise .................. The following table shows the relation between allowable noise level (C characteristic) and frequency at the S-4800 installation site. The allowable amplitude corresponds to an image deviation of less than 0.2 mm on a micrograph at magnification 220,000× .

Frequency : f (Hz)	Allowable Noise Level（Type I）	Allowable Noise Level (Type II）
ｆ≦150	75 dB or less	72 dB or less
150≦ｆ≦800	60 dB or less	60 dB or less
800≦ｆ≦2000	54 dB or less	52 dB or less

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