VDD Digital Vibrometers - Technical Data

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Front-End Specifications

VDD-E-600 Stand-Alone Digital Front-End
Power	100 VAC ... 240 VAC, max. 75 W
Dimensions [W x L x H]	235 mm x 320 mm x 150 mm (9.3 in x 12.6 in x 5.9 in)
Weight	5.7 kg (12.6 lbs)
Signal inputs REF1/REF2	±200 mV ... ±10 V, into 1 MW
Input coupling	AC or DC, adjustable by software
Inputs TRIG, GATE, AUX	TTL/CMOS
Output SIGNAL	Internal generator output, max. ±10 V
Outputs SYNC, AUX	TTL/CMOS
DD-600 Signal Converter Board for OFV-5000 Vibrometer Controller
Decoder type	Auxiliary decoder (I&Q converter)
Output signal	Baseband Doppler signal in I&Q format for external VDD decoding
VDD-Z-011 Junction Box
Signal input REF	±200 mV ... ±10 V, into 1 MW
Input coupling	AC or DC, adjustable by software
Inputs/outputs	as specified for VDD-E-600

Performance Specifications

VDD Performance Specifications
Frequency range	0 Hz … 2 MHz
Max. no. of FFT lines	12,800
Maximum no. of samples	Time mode: 64 MSa FFT mode: 32,768
Max. velocity for frequency, f, and sample time, t	Frequency		f £ 51.2 kHz		f > 51.2 kHz
	Time t < 1 s		810 mm/s		810 mm/s
	Time t = 1 s ... 2 s		810 mm/s		405 mm/s
	Time t > 2 s		405 mm/s		405 mm/s
Velocity resolution¹⁾, depending on the vibration frequency f	f = 2 kHz	f = 20 kHz		f = 200 kHz		f = 2 MHz
	0.005 µm s^-1/ÖHz	0.05 µm s^-1/ÖHz		0.5 µm s^-1/ÖHz		5 µm s^-1/ÖHz
Max. displacement	unlimited
Displacement resolution¹⁾	< 0.4 pm/ÖHz
Maximum displacement error	±(1 % of RMS reading) for 1 nm … 100 nm ±(0.2 % of RMS reading + 1 nm) for ³ 100 nm
Total harmonic distortions	< 0.1 % up to 50 kHz (sinusoidal vibration)
Amplitude frequency response	Displacement: typ. ±0.1 % Velocity: typ. ±0.2 % Acceleration: typ. ±0.2 %
Spurious signals	<20 pm

¹⁾ Resolution is defined as the signal amplitude (rms) at which the signal-to-noise ratio is 0dB in a 1 Hz resolution bandwidth (RBW), measured on 3M Scotchlite Tape™ (reflective film). The velocity resolution values refer to the settings for a maximum velocity of 810 mm/s.

Data Acquisition System

VDD Data Acquisition System
Acquisition board	4 channels (2 for I/Q signal, 2 for reference); 5 MSa/s, 12 bits
Computer (optional)	PC-D Desktop PC or PC-I Industrial PC (from Polytec) System requirements: AMD Athlon™ 3000 XP+ or Intel Pentium 4; 3.0 GHz or higher; 512 MByte RAM; Windows^® XP Professional or Windows^® 2000 operating system
Signal generator (optional)	1 channel, 512 kHz, arbitrary waveforms
External signal generator	HP-33250A (option from Polytec) or HP-33120A (discontinued model), connected to GPIB via USB adapter

VibSoft-VDD Software

VibSoft-VDD Software
Vib-S-VDD	Digital data acquisition and processing, time & frequency domain displays, time & frequency domain averaging, digital filter program, time domain integration & differentiation. Input channels for vibrometer & reference (VDD-E-600: 2 references)
VIB-S-GateIn	TTL Gate input software
VIB-S-FFT128	Supports 12,800 FFT lines
VIB-S-VBEng	Creates Visual Basic^® Scripts for automation of measurements and data presentation. Includes User Defined Data Sets (UDDS) for adding external or post processed data
VIB-S-ExpUFF	Converts data to Universal File Format (UFF)
VibSoft-VDD Options
VIB-S-SIG-M	Internal arbitrary waveform generator
VIB-S-FFTEXT	Allows calculation of extended amount of FFT lines up to 819,200 lines*
VIB-S-ExtSig	Controls external arbitrary waveform generator via optional adapter
VIB-S-ExpME	Binary data interface for data exchange with ME’scope software
VIB-S-SigPro	Polytec Signal Processor, the user interface to the math library included in the VibSoft Software
VIB-S-VIDEO	Video option for VibSoft and VDD Software

*)Possible number of FFT lines depends on the sampling rate of the acquisition system.

Compliance with Standards

Compliance with Standards
Electrical safety	IEC/EN 61010
EMC	IEC/EN 61326 Emission: FCC Class B, IEC/EN 61000-3-2 and 61000-3-3 Immunity: IEC/EN 61000-4-2 to 61000-4-6 and IEC/EN 61000-4-11
Laser safety	IEC/EN 60825-1 (CFR 1040.10, CFR 1040.11)