Features

• 24-bit ADC per analog input
• 4 analog inputs, ±10V on 640 (±60V max without damage)
• 5 analog inputs, ±40V on 650 (±60V max without damage)
• AC/DC coupling per channel
• IEPE current source per channel (20V compliance)
• Any analog input can be a tachometer input
• Pseudo-differential input
• Total harmonic distortion of -100 dB (typical)
• Channel-to-channel phase matching of <0.12 degrees at 1 kHz
• Spurious-free dynamic range of 108 dB (typical)
• USB2 and 10/100BaseT Ethernet versions
• Model 650 for rotating machinery analysis
• Model 640 for noise, vibration, and harshness testing
• 24-bit DAC analog output (640 only)
• Analog outputs: sine, swept sine, random, burst, arbitrary
• Analog Output Signal-to-Noise Ratio: 100 dB (typical)
• 8-bit digital IO port
• TEDS support
• Power input of 6 to 16 VDC
• Analysis rates are software programmable from 20 Hz to 40 kHz

General Specifications

Environment

• Operating Temperature
  • 640u and 650u: -30˚ to 70˚
  • 640e and 650e : 0˚ to 50˚C
• Humidity: o˚ to 95% RH, non-condensing
• Vibration: IEC 600068-2-64
• Shock: IEC 600068-2-27
• Emissions: EN61326, 89/366EEC
• Safety: EN61010
• Ingress: IP40
• Power Consumption
  • 640e and 650e: 5.0W max
  • 640u and 650u : 2.5W max
• Input Power Range: 6 to 16 VDC
• PC Communication
  • 640e and 650e: 10/100BaseT Ethernet
  • 640u and 650u : USB2.0
• Dimensions: 142.24mm W x 180.34mm D x 38.1mm H (5.6"x7.1"x1.5")
• Weight: 675g (1.5Ibs)
• Warm-up: 30 minutes to rated specifications

Analog Specifications

Analog Measurements

• ADC Converter Resolution: 24bits
• ADC Converter Type: Delta-sigma
• Sample Rates: Up to 105,468 sample per second (Software dependent)
• Sample Rates Accuracy: ±50ppm
• Channels
  • 640e and 650e: 4 input channels
  • 640u and 650u : 5 input channels
• Input Connector: 1 BNC per channel
  

  Input Impedance	640e/640u	650e/650u
  High to ground	200k Ohm II 130p	800k Ohm II 120p
  Low to ground	1k Ohm	1k Ohjm
  High to low	201k Ohm	801k Ohm

• Input Cuoling: DC, AC, or AC + IEPE; software programmable per channel basis
• High-Pass Filter (AC Coupling Cutoff)
  • 640e and 650e: 1.0 Hz
  • 640u and 650u : 0.1 Hz
• Input Range
  • 640e and 650e: ±10V peak
  • 640u and 650u : ±40V peak
• Input Protection: ± 60V max without damage
• Over-Range Indication: Software
• Low-Pass Filter: Software programmable per channel
• Type: Antialiasing hardware 3-pole 360 kHz, software selectable FIR filter. Any aliasing above 27 MHz is lost in the noise floor of 64k FFT.

Amplitude Accuracy

• Amplitude-3dB: 0.49 x sample rate
• Amplitude Flatness: ±0.05 dB typ ±0.10 dB max DC to 20kHz
• Total Harmonic Distortion: -100 dB typical 1 kHz-97 dB typical 10 kHz
• SFDR Including Harmonics: 108 dB typical DC to 50kHz
• SFDR -60dB: 128dB typical DC to 50 kHz
• Channel to Channel Crosstalk: <-100dB at 1 kHz
• Channel to Channel Phase Matching
  • 640e and 640e: <0.04°/kHz + 0.08°
  • 650u and 650u : <0.06°/kHz + 0.1°
• Common Mode Rejection Ratio: -70dB typ -55dB max at 1kHz
• Wideband Noise
  • 640e and 640u: <46 μ V RMS typ 76 μ V RMS max
  • 650e and 650u : <184 μ V RMS typ 304 μ V RMS max
• IEPE Bias Source (640, 640u, 650, 650u channels 1 to 4)
  • Current: 2.1 mA, 21V compliance (on/off software programmable per channel)
  • Impedance: >255k Ohm
• IEPE Fault Detection Thresholds:<1V(short), > 20V(open)
• IEPE Fault Indication: Software indicator, per channel

Analog Output (640e, 640u only)

• Chnnels: 1
• Signal Connection: BNC
• Frequency Range: DC to 45 kHz (-0.25dB)
• Frequency Accuracy: ±50ppm
• DAC Resolution: 24bit
• DAC Update Rate: 93.75 KSps
• DAC Type: Delta-sigma; initial value 0.0V for 640e and 650e; not guaranteed for 640u and 650u
• Amplitude settings: 0 to 7V p-p or 0 to 3.5V peak
• Amplitude Accuracy at 1kHz: ± 0.05dB typ ±0.12 dB max
• Amplitude Flatness (DC to 20kHz): ±0.02dB typ ±0.1dB max
• SNR (DC to 20kHz): 100dB typ 90dB max
• Maximum Load: 1k Ohm (50Ohm with external power)
• Waveform Modes: Sine, swept sine, random, burst, arbitrary
• Output Impedance: 50 Ohm

Tachometer Inputs

• Any analog input channel may be used as a tachometer input