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Active Vibration Isolation System
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Transparent Enclosure
Mounting Accessories
Active Vibration Isolation System Print

HOLMARC's active vibration isolation system contain pneumatically isolated supports that effectively decouple the optical table from vertical and horizontal vibrations throughout the critical 3 to 50 Hz frequency range. The most common large-amplitude sources of vibrations found in laboratories vibrate within this range of frequencies. If the source of compressed air is removed, the optical tabletop will lower until it securely rests on the supports and the table will no longer be isolated from floor vibrations. The active optical table supports can be used to dramatically reduce the vibrations transmitted to an optical table setup in a noisy environment.

 
Vertical Resonant Frequency
: 1.25 Hz
Horizontal Resonant Frequency
: 1.0 Hz
Vertical Transmissibility at Resonance
: 10 dB
Horizontal Transmissibility at Resonance
: 12 dB
Vertical Transmissibility at 5Hz
: -20 dB (90%)
Horizontal Transmissibility at 5Hz
: -24 dB (94%)
Vertical Transmissibility at 10Hz
: -32.5 dB (97.5%)
Horizontal Transmissibility at 10Hz
: -30 dB (97%)
Maximum Load Capacity (set of four)
: 1500 kg)
Height Adjustment Range
: -10 mm, +5 mm
Self Leveling Repeatability
: ± 0.5 mm
Height
: 700 mm
Air Pressure (Maximum)
: 80 psi
Finish
: Black Paint
* The specification data above was measured under a 600 kg load (24% of maximum).
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    Accessories   Accessory Order Code
    Overhead Table Shelf : OTS
    Faraday Cages : FCU
    Transparent, Semitransparent &
    Opaque Full body Enclosure
: TEU, SEU & OEU
    Central Rack : CRS
    Bottom Rack : BRS
    Arm Rest & Support Rails : ARS
Accessories code can be added along with the rigid tabletop
support model number under bracket for ordering.
Eg. RTS 120-120 (OTS, ARS, BRS, SEU)
 
Types Suitable for
tabletop models
AVIS 300 From TT 300
AVIS 150 Upto TT 240
Vibration Isolation Legs

Vibration Isolation Legs are ideal for isolating optical tables from floor vibrations. These are available in two models - AVI 203S and AVI204S. Load capacity of AVI 203S is in the range of 60-600kgs and for AVI 204S, it is 25-200kgs. Standard legs are in 300mm diameter and 700mm height(custom heights are also available upon request).

Holmarc's vibration isolation legs have an air isolator in each leg. The entire leg is coated in black paint(custom colors are also available). Four legs are preferred for standard loads. More than four is needed for higher loads and longer tables.

Holmarc's AVI legs are easy to set up and maintain. These are cost effective solutions, without compromising performance.

Common Vibration Sources
Types Frequency (Hz Amplitude (inches)
Air Compressors 4 - 20 10-2
Handling Equipment 5 - 40 10-3
Pumps 5 - 25 10-3
Building Services 7 - 40 10-4
Foot Traffic 0.5 - 6 10-5
Elevators Up to 40 10-3 to 10-5
Building Motion 46 / Height in meters 10--1
Building Pressure Waves 1 - 5 10-5
Railroad * 5 - 20 +/- 0.15g
Highway Traffic * 5 - 100 +/- 0.001g
* Amplitude is reported in dB using the acceleration
due to gravity as the reference acceleration.
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