STACIS IIIc is a compact version of our STACIS III active piezoelectric vibration cancellation system. It offers the same outstanding vibration isolation performance at a reduced height.
STACIS IIIc is ideal in situations where there is no, or very low, raised floor, where the height of the standard STACIS III system would make the instrument too tall.
In a 3-isolator configuration isolator height is less than 60% of the regular STACIS III height. In systems with more than 3 isolators the height will be between 60 and 70% depending on payload setup. See specifications below for details.
Performance Specifications
| Active degrees of freedom | 6 |
| Active bandwidth | 0.6 Hz - 150 Hz |
| Passive natural frequency | 18 Hz vertical and horizontal |
| Effective active resonant frequency | 0.5 Hz |
| Isolation at 1 Hz | 40% - 70% |
| Isolation at ≥2 Hz | ≥90% |
| Settling time after a 10 lb (4.5 kg) step input (10:1 reduction) | 0.3 sec |
| Internal noise | <0.1 nm RMS |
| Operating load range per isolator | Low capacity: 400-1100 lbs (182-500 kg) Med capacity: 900-2100 lbs (410-955 kg) Hi capacity: 1900-4500 lbs (864-2045 kg) |
| Stiffness (1000 lb / 454 kg mass, Med capacity isolator) | 40,000 lb/in. (73 x 105 N/m) |
| Magnetic field emitted at maximum 4 in. (102 mm) from the isolator | <0.02 μG broadband RMS |
Isolator Design, Dimensions, and Environmental and Utility Requirements
| Environmental and safety | CE and RoHS compliant |
| Active isolation elements | Piezoelectric actuators with minimum 3300 lb. (1500 kg) capacity receive signal from a high-voltage amplifier with an output of up to 800 VDC. Vertical actuators support the isolated payload. |
| Passive isolation element | single stiff isotropic elastomer (no compressed air supply required) |
| Vibration sensor elements | downward facing geophone type inertial sensors that measure floor vibration below the isolator and deliver voltage proportional to the velocity of vibration motion |
| Active feedback control loop | Floor vibration is measured, processed and attenuated below the spring supporting the isolated surface |
| Isolator dimensions (WxDxH) |
14.45 x 14.26 x 6.16* in. 367 x 362 x 157* mm * Unloaded height. Loading may decrease height by up to 0.12 in. (3 mm). Systems with ≥4 isolators may require the addition of external wedge mounts that add 1.6 in. (41 mm) to the height. |
| Isolator weight | 53 lbs (24 kg) |
| Operating temperature | 50° - 90° F 10° - 32° C |
| Storage temperature | -40° - 130° F -40° - 55° C |
| Humidity | 80% at 68 deg F (20 deg. C), Max dewpoint: 18 deg C |
| System power requirements | 100, 120, 230, 240 VAC 50/60 Hz AC; <600 W CE compliant |
| Floor displacement | <480 μin. (12 μm) below 10 Hz |
| Isolator count per system | minimum of 3 |
| Options | laminated stainless steel platforms, frames, risers, leveling devices, earthquake restraints, lifthoods |
DC-2020 Controller Specifications
| Dimensions (WxDxH) | 19 x 8.5 x 1.75 in. 483 x 216 x 45 mm |
| Weight | 6.3 lb (2.9 kg) |
| Processor | 150/75 MHz dual core |
| Sampling rate | 10 kHz |
| Analog outputs | 16 channels |
| Analog inputs | 16 channels |
| Status light | single LED |
| Front panel ports | 1x serial USB 2.0 1x serial Micro-USB 1x Ethernet RJ-45 2x BNC |
| Rear panel ports | 1x serial USB 2.0 1x Ethernet RJ-45 1x RS-232 DB-9 legacy serial for legacy STACIS 2100 isolators |
| User interface | Front panel LCD display Character menu on HyperTerminal Extended GUI for Microsoft Windows Embedded Ethernet GUI |