OFV-5000 Modular Vibrometer Controller - Decoders
By selecting from a choice of different analog and/or digital decoders, performance of the OFV-5000 Vibrometer Controller can be precisely tailored to match the demands of the application. Up to four decoders can be installed simultaneously to obtain the greatest possible flexibility. This flexibility also allows subsequent add-ons and modifications to meet future needs.
Decoder Selection
The OFV-5000 controller is designed to accept a choice of signal processing modules, each optimized for different frequency, velocity or displacement performance. Various analog and/or digital decoder options seamlessly cover the entire velocity range up to ± 10 m/s, displacements from picometers to meters, and frequencies from DC to 24 MHz. For vibration velocities up to 20 m/s Polytec provides the OFV Modulare 20 m/s Vibrometer.
The following tables list the basic features of the velocity and displacement decoders available for the OFV-5000 Controller. For more information please see separate data sheets for the respective decoders and the OFV-5000 vibrometer controller.
|
Available Velocity Decoders |
|
Decoder |
Description |
No. of ranges |
Best resolution |
Max. velocity |
Upper
freq. limit |
|
VD-02 |
Wide-bandwidth velocity decoder |
4 |
0.15 µm/s |
10 m/s |
1.5 MHz |
|
VD-04 |
Mid-frequency velocity decoder prerequisite to DD-400 |
3 |
0.2 µm/s |
10 m/s |
250 kHz |
|
VD-05 |
10 MHz velocity decoder for ultrasonics |
2 |
< 3 µm/s |
5 m/s |
10 MHz |
|
VD-06 |
Digital high-precision velocity decoder |
4 |
0.02 µm/s |
0.5 m/s |
350 kHz |
|
VD-09 |
Broadband digital velocity decoder |
14 |
0.02 µm/s |
10 m/s |
2.5 MHz |
|
Available Displacement Decoders |
|
Decoder |
Description |
No. of ranges |
Best resolution |
Full scale output |
Freqency range |
|
DD-100 |
Basic displacement decoder
Requires any velocity decoder |
8 |
80 nm |
±82 mm |
0 Hz -
250 kHz |
|
DD-200 |
High-resolution displacement decoder
Requires any velocity decoder |
13 |
2 nm |
±82 mm |
0 Hz -
250 kHz |
|
DD-300 |
20 MHz displacement decoder for ultrasonics
Requires any velocity decoder |
1 |
0.1 pm |
±75 nm |
30 kHz - 24 MHz |
|
DD-400 |
Integrating displacement decoder
Requires VD-04 |
3 |
frequency dependent |
±1 nm |
20 Hz - 250 kHz |
|
DD-500 |
Digital high-end displacement decoder
Requires VD-06 |
16 |
15 pm |
±50 mm |
0 Hz -
350 kHz |
|
DD-900 |
Broadband digital displacement decoder
Requires VD-09 velocity decoder |
16 |
15 pm |
±50 mm |
0 Hz -
2.5 MHz |
|
DD-600 |
I&Q converter for data processing with VibSoft VDD |
Decoder Combination
The OFV-5000 controller has four internal slots to accept up to four different signal decoders, depending on the desired measurement ranges. Two are specifically designated for velocity decoders and one is for the displacement decoder. An Auxiliary Slot is provided that can take either an optional velocity or displacement decoder.
The following table contains recommended decoder combinations for representative applications. More combinations adding further decoders are possible. If you have specific requirements, please contact Polytec’s application and sales engineers who will help you select the appropriate decoders and VibSoft software.
|
Recommended Decoder Combinations |
|
VD-02
|
DD-200 |
Measurement of velocity and displacement up to 1.5 MHz and 10 m/s velocity. General applications, e.g. acoustics, mechanical and automotive engineering |
|
VD-06
|
DD-500 |
Digital, high-precision measurement of velocity and displacement at frequencies up to 350 kHz with velocity range limited to 0.5 ms-1. Demanding applications e.g. acoustics, micro systems, precision mechanics |
|
VD-02
VD-06 |
DD-500 |
Same as VD-06+DD-500, but vibration frequency range extended up to 1.5 MHz and velocity range extended up to 10 m/s |
|
VD-02
VD-05 |
|
Measurement of velocity at high frequencies up to 10 MHz.
High-frequency applications, e.g. ultrasonics, micro systems |
|
VD-02
|
DD-300 |
Acquisition of vibrations at frequencies up to 24 MHz.
High-frequency applications, e.g. ultrasonics, micro systems |
|
VD-04 |
DD-400 |
Special solution for measurement of small displacements at very high velocities. Applications: monofrequent ultrasonic tools and processing, e.g. wirebonding, ultrasonic welding |
|
VD-09
|
|
Acquisition of vibrations at frequencies from DC up to 2.5 MHz at high resolution and velocity. Application: ultrasonics and microstructures |
|
VD-09
|
DD-900 |
Additional direct displacement output with picometer resolution. Suitable for measurements signals with DC components like switches or transient behaviour |
|
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