Providing service to users of equipment such as Electron Microscopes, Steppers, Scanners, Lasers or any other equipment with Vibration, Magnetic field or acoustic sensitivities.
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SC11 Sensor Interface Analysis System
Magnetic Field, Vibration and Acoustics - In-depth analysis from the compact, all-in-one easy to use system

 

 

 
SC11 Introduction
 
Basic System Description
Basic System Specification
 
SC11 Sensor Interface System Description
SC11 Sensor Interface System Specification
 
 
 

SC11 Sensor Interface Product Specification

 

System
  Carrying Case Size 58 x 36 x 19 cm (23 x 14 x 7.5 in) approx.
  Weight 11 kg (24 lb) approx. including typical laptop PC.
     
Laptop Personal Computer
  Processor 266 MHz Pentium min, 1 GHz Pentium rec.
  Memory 64 MB min, 128 MB rec.
  Free Hard Disc 100 MB min.
  CDROM 24X rec.
  Floppy Drive 3.5 in. 1.44 MB
  PCMCIA Slot Type 2
  Operating System Windows 98/Me/NT/2000/XP
 
Data Acquisition Card
  Type National Instruments DAQCard-6024E
  Resolution/Range Bits Input Range Resolution
      12 Fine: ±0.5V, Coarse: ±10V Fine: 0.24 mV, Coarse: 4.8 mV
  Anti-aliasing filters 5 kHz, 250 Hz (switchable)
 
Core System: SC11 Sensor Interface
  Inputs  
    MAG 3-axis magnetic field sensor (SC20 AC or wideband DC sensor)
    VIB1, VIB2, VIB3 3-axis vibration (3 x Wilcoxon 731A)
    MIC Precision microphone (Brüel & Kjær, 4190/2669L)
    AUX BNC voltage input, DC coupled, ±10 V range, 100 kOhm input impedance
  Anti-aliasing filters 5 kHz, 250 Hz (switchable)
  Power 100 - 240 V AC, 50 - 60 Hz, 0.25A max
 
3-axis Magnetic Field Sensor: SC20/AC
  Co-ordinate System X, Y, Z rectangular Cartesian
  Dynamic Range 40 mG (4 µT) Pk-Pk
  Bandwidth 5 Hz - 20 kHz
  Noise Limit 100 nG (10 pT)/root Hz RMS at 50 Hz, 10 nG (1 pT)/root Hz RMS at 250 Hz, typ.
  Accuracy ±1 %
 
3-axis Magnetic Field Sensor: SC20/DC
  Co-ordinate System X, Y, Z rectangular Cartesian
  Dynamic Range 40 mG (4 µT) Pk-Pk
  Ambient Field Range ±2 G (±200 µT)
  Bandwidth DC - 5 kHz
  Noise Limit DC: 30 µG (3 nT) Pk-Pk typ. (0.0001 - 0.01 Hz)
    AC: 1 µG (100 pT)/root Hz RMS typ. at 50 Hz
  Accuracy ±5 % (after >1hour warm up). (±15 % cold)
 
Vibration Sensor: Wilcoxon 731A Accelerometer
  Type Wilcoxon Research, model 731A
  Dynamic Range 20 mm/s2 Pk-Pk
  Bandwidth 0.1 - 500 Hz, 0.1 - 250 Hz (switchable)
  Noise Limit 7 µm/s2 RMS max.
    0.35 µm/s RMS at 1Hz, 0.11 µm/s RMS at 5Hz
    0.07 µm RMS at 1Hz, 0.0035 µm RMS at 5Hz
  Accuracy ±5 % (with gain calibration file)
 
Acoustic Sensor: B&K 4190/2669L Precision Microphone
  Type Brüel & Kjær, Condenser microphone 4190, Pre-amplifier 2669L
  Dynamic Range 20 dB to 103 dB (in this system)
  Bandwidth 1.5 Hz - 20 kHz
  Accuracy ±1 dB 3 Hz - 20 kHz
 
Acoustic Sensor: Sound Level Meter
  Type Radio Shack, Model 33-2050 or 33-4050
  Dynamic Range 50 dB to 126 dB
  Accuracy ±2 dB at 114 dB sound level
  Reference 0 dB = 20 µPa RMS
  Frequency Response dBA and dBC weightings
  Meter Response Fast, Slow
  Signal Output 1.0 V peak into open circuit with full scale meter deflection at 1 kHz
  Load Impedance 10 kOhms min.
  Distortion < 2 % at 1 kHz and 0.5 V
 
1-Axis Magnetic Field Sensor: Flux Gate Magnetometer
  Type MEDA µMAG-01N
  Ranges ±20.00, ±200.0, ±2000 mG full scale
  Bandwidth 0 - 100 Hz
  Accuracy ±0.5% of full scale
  Linearity ±0.05% of full scale
  Signal Output ±2 V full scale
 
Programs (General)
  Clipping Audio/visual indication
  Pause control Freeze/resume instrument operation
  Calibration panel Add/select sensors, set ranges, calibrate offsets, microphone self check, add/edit user defined units, set decimal symbol
  Setup file Open/save instrument controls
  Export Export results for spreadsheet
  Comment pad 3 lines
  Print window Print current screen display
  Help Context help on controls, online help file
  Year 2000 All SC11 programs are year 2000 compliant
 
Oscilloscope
  Channels 4 (X, Y, Z and A) each with style and position controls
  Divisions 10 X 10
  Ranges Division Size Unit
    Magnetic Field 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50 mG
      10, 20, 50 nT
      0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50 µT
      10, 20, 50 mA/m
      0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50 A/m
    Vibration 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50 mg's *
      0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50 mm/s2
    Acoustic 20, 50 mPa
      0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50 Pa
    Voltage 20, 50 mV
      0.1, 0.2, 0.5, 1, 2, 5, 10 V
    Resultant |XYZ| Magnetic Field, Vibration, Voltage units
    User defined 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50  
    Timebase 0.5, 1, 2, 5, 10, 20, 50, 100, 200 ms
  Bandwidth 5 kHz (0.5 ms/div - 5 ms/div)
    250 Hz (10 ms/div - 200 ms/div)
  Digital Meter RMS, Peak to Peak (all channels)
  Trigger Auto/Manual level, +/- edge, Auto/Manual source
    Single Shot
 
Spectrum Analyser
  Displays Waveform (autoscaling), Spectrum
  Amplitude units  
    Magnetic field mG, nT, µT, mA/m, A/m
    Vibration µg's*, mg's*, mm/s2, µm/s, mm/s, nm, µm
    Acoustic mPa, Pa, dB, dBa, dBC
    Voltage mV, V
  Amplitude ranges 0.5, 0.7, 1, 1.5, 2.5, 3.5, 5, 7, 10, 15, 25, 35, 50, 70, 100, 150, 250, log full scale
  Frequency ranges 20, 25, 30, 40, 50, 60, 80, 100, 125, 150, 200, 250, 300, 400, 500, 600, 800, 1000, 1250, 1500, 2000 Hz full scale
  Number of points 200, 250, 400, 500, 800, 1000, 1600, 2000
  Accuracy Amplitude: ±5% (not including sensor accuracy or noise)
    Frequency: ±0.01% ±0.02 div
  Pan & Zoom Palette Pan, zoom and format spectrum display
  Waveform windows None, Hanning, Flat top
  Spectrum modes RMS, 0-Pk, Pk-Pk, Third Octave
  Combine spectra Average/Peak, Max no. spectra
  Cursor modes Total RMS between 2 tracking cursors, 10 harmonic cursors
  Specification files Create, edit, add & remove. Compare with measurements.
  Capture indicator Indicates progress of data acquisition
  Data logging Start: Now, At time, Triggered by flat level, Triggered by spec
    Stop: Period, File size, Disk space
    Min. time step: 2 minutes
 
Chart Recorder
  Channels 4 (X, Y, Z and A) each with style and position controls
  Divisions 10 X 10
  Ranges as Oscilloscope, except
      Division Size Unit
    Vibration 10, 20, 50 µm/s
      0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50 mm/s
      0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50 µm
    Timebase 0.5, 1, 2, 5, 10, 20, 50 s
      50 points/div
  Chart length 200 div. max. (1.6 minutes - 2.7 hours)
  Bandwidth (Bandwidth is reduced in some modes)
    Magnetic field (SC20/DC sensor) DC - 250 Hz
    Magnetic field (SC20/AC sensor) 5 Hz - 250 Hz
    Vibration 0.01 Hz - 250 Hz
    Acoustic (Precision Microphone) 1.5 Hz - 250 Hz
    Acoustic (SLM) 20 Hz - 250 Hz
    Voltage DC - 250 Hz
  Chart palette Pan, zoom, format, reset and clear chart
  Chart modes Waveform, RMS, Peak to Peak, Waveform ext. LF, Narrow band RMS, Narrow band Pk-Pk.
  Update modes Strip chart, scope chart, sweep chart
  Bandwidth display XYZ/A upper/lower for all modes except narrow band
  Narrow band filter Centre frequency, f0 range: 1 Hz - 250 Hz
Accuracy: ±1% within pass band, f0 ± 3%
Attenuation: 60 dB min. in stop band, f0 ± 20%
  Markers Time, text string
  Data logging Start: Now, At time, Triggered
Stop: Period, File size, Disk space
Time step: Whole number of points (0.01 s at 0.5 s/div)
 
* g is the acceleration due to gravity
 

Vibration Engineering Consultants, 4555 Paul Sweet Road, Santa Cruz, CA 95065,   (831) 465-9189