SE-21
Powerful high-frequency exciter as part of the SE-2X series with cube-shaped ceramic armature for excitation of all DUT axes.
With its electrodynamic drive system, the SE-21 offers a very wide frequency range with low transverse motions. A high payload, simple operation in a climatic chamber (as SE-21T) and the many extensions enable the SE-21 to be used as a multi-tool for testing, characterizing and calibrating vibration sensors or smaller electronic devices.
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Product details
Technical data
| SE-21 | |
| Force rating, max. (sine-peak) | 95 N 1) |
| Frequency range | DC … 50 kHz 3 Hz … 50 kHz with optional internal reference accelerometer |
| Acceleration, max. (sine-peak) | 390 m/s² 1) |
| Displacement, max. (peak-peak) | 10 mm |
| Transverse motion | typical < 5 % 2) |
| Payload, max. | 2 kg (vertical) / 1 kg (horizontal) |
| Temperature range (in operation) | -20 °C … +80 °C |
| Stray magnetic field on table | < 3 mT |
| Armature weight | 245 g |
| Weight (total) | 17 kg |
| Dimensions (H × W × L) | 164,5 mm × 270 mm × 270 mm |
All specifications are at room temperature unless otherwise specified. Technical data achieved with power amplifier PA 500 DM.
1) interval mode of operation
2) up to 35 kHz: single peaks up to 10 % / better than ISO 16063-11/21; up to 50 kHz: single peak more than 10 %
For a wider temperature range, especially to be used in climate chambers, we offer a special T-variant of the SE-21.
DUT mounting
- cube 30 mm / 1.2 in
- DUT mounting with adhesive
- thread patterns on request
Options and accessories
- suitable power amplifier PA 500 DM
- internal reference accelerometer including BNC cable
- set for active cooling
- readout set for the internal temperature sensor
- trunnion base for operation of the vibration exciter at a wide tilt angle range
- DUT mounting kit
For further details, please refer to the technical data sheet. Subject to change without notice.
Performance
The diagrams below show the performance of the SE-21 and SE-21T for operation alternating between 10 minutes at full load and 10 minute breaks (blue graph). Performance may vary for different cycles. The yellow graph shows acceleration values that can be safely used during continuous operation.
At 2 kHz, you can see a boost in the maximum acceleration. This is due to a new bearing design which minimizes transverse motion over the whole frequency range and reduces the moving mass above 2 kHz, thereby allowing for increased acceleration at equal force.
PA 500 DM
This specially designed power amplifier offers a max. frequency range DC...200 kHz, small harmonic distortion, excellent stability even with temperature or supply line variations and helpful protection functions.
For all vibration exciters that require a 500 VA power amplifier (load impedance 4 Ω).
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SE-2x Trunnion Base
Allows the vibration axis of the exciter (SE-20, SE-21 and SE-29) to be tilted and locked at any angle between 0° and 90° from the vertical axis.
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Large set of adapters
large set of adapters for sensor mounting (screwing and gluing)
including adapter plate
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