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Group 3 Digital Teslameters (Gaussmeters), DTM-133 & 151 
Tabs
 
Specifications - DTM-151
 Electrical
  Measurement modes  Filter on, filter off, peak hold on, peak hold off,
 tesla, gauss, manual, and autoranging
  Ranges  Manual or autoranging, actual range depends on
  probe used, see probe specifications, below
  Digitization  20 Bits, (1 bit for polarity, 19 bits for field)
  Accuracy  ± 0.01% of full scale
  Time stability  ± 0.1%/year max
  Measurement rate  10 per second (digitally corrected)
  Display rate  10 per second (digitally corrected)
  Response time  < 0.3 seconds with digital filter off
  Operating temperature  0 to 50°C
  Ambient field  Maximum operating field for meter:
 10mT with single range probe
 0.5mT with multi-range probe
  Interfacing options  RS-232C & fiber optic or IEEE-488 (GPIB)
  External power input  9 to 12Vac, 900mA max
 9.5 to 19Vdc, 0.75mA max
  Analog monitor output
   Full scale output  ± 3V, nominal, uncorrected
   Source impedance  1kOhm
   Zero offset  < ±10mV max
   Accuracy  ± 5%
   Residual noise  < 0.5mV p-p
   Bandwidth  9kHz at - 3dB, rolloff 3-pole 6dB/decade
  Controls and indicators
    Front panel
      Range  Select between ranges
      Mode  Change measurement modes
      Display  7 character, 7 segment LED
      Indicators  8 LED back-lit legends for range, filter, hold,
 tesla, and gauss
   Internal
      Internal controls  1 x 2 position DIP switch for default modes
 2 x 8 position DIP switches for addressing and
 communications
 Mechanical
  Enclosure  Aluminum 
  Dimensions (mm)  217 x 125 x 50 
  Weight  1.2kg
  Connectors 
    Power input  2.1mm coaxial socket
    Probe  40 position dual row header
    Analog output  Molex 2-position header, M5046-2
    RS-232  26 position dual row header and
 HP Versalink fiber optic
    IEEE-488  Amphenol 57-20240 socket with metric standoffs

DTM Kit, Panel Version, Standard Delivery

 Panel version comes complete with:
   Rack mounting digital teslameter (gaussmeters)
   Support bracket (with panel versions only)
   Plug pack
   Molex 2-position socket
   System manual (not pictured)

DTM-151-PG, MPT-141-3s, and Probe Holder  Three DTM-151-PGs in a 19" rack panel   DTM-151 Front and Rear panels

Specifications - Probes
 Electrical
  Orientation  Transverse
  Temperature range  0 to + 50°C operating to spec, - 20 to + 60° max
  Accuracy  ± (0.03% of reading + 0.03% of full scale) max
 at 25°C
  DTM-151 with MPT-141 Probe
   Ranges  0.3T, 0.6T, 1.2T, & 3.0T
 (3,000, 6,000, 12,000 & 30,000G)
   Resolution (Digital Filter OFF)
     Displayed  5µT, 10µT, 20µT, & 50µT
 (0.05, 0.1, 0.2, & 0.5G)
     Via the interface  0.1µT, 1µT, 1µT, & 1µT
 (0.001, 0.01, 0.01, & 0.01G)
   Resolution (digital filter on)
     Displayed  1µT, 2µT, 4µT, & 10µT
 (0.01, 0.02, 0.04, & 0.1G)
     Via the interface  0.1µT, 1µT, 1µT, & 1µT
 (0.001, 0.01, 0.01, & 0.01G)
   Accuracy  ± (0.01% of reading + 0.006% of full scale) max
 at 25°C
   Calibration  ± 10ppm of reading/°C max
 add - 3ppm/°C for each meter of probe cable
   Zero drift  ± (1µT + 0.0003% of full scale)/°C max
  DTM-151 with MPT-231 Probe
  Ranges  0.03T, 0.06T, 0.12T, & 0.3T
 (300, 600, 1,200 & 3,000G)
   Resolution (digital filter off)
     Displayed  0.5µT, 1µT, 2µT, & 5µT
 (0.005, 0.01, 0.02, & 0.05G)
     Via the interface  0.01µT, 0.1µT, 0.1µT, & 0.1µT
 (0.0001, 0.001, 0.001, & 0.001G)
   Resolution (digital filter on)
     Displayed  0.1µT, 0.2µT, 0.4µT, & 1µT
 (0.001, 0.002, 0.004, & 0.01G)
     Via the interface  0.01µT, 0.1µT, 0.1µT, & 0.1µT
 (0.0001, 0.001, 0.001, & 0.001G)
   Accuracy  ± (0.03% of reading + 0.006% of full scale) max
 at 25°C
   Calibration  ± 25ppm of reading/°C max
 add -3ppm/°C for each meter of probe cable
   Zero drift  ± (1µT + 0.0003% of full scale)/°C max
 Mechanical
  Dimensions (mm)
   Probe head  14 x 5 x 2
   Sensitive area  1 x 0.5 x 0.08
   Probe cable diameter  6.6

   Probe cable length

 3 meters standard, (30 meters max)
   Connector  83 x 77 x 17

MPT Probe  MPT Probe and Holder   MPT Probe Drawing
 
  Tel: + 650-802-8292    Fax: + 650-802-8298
   
Email:     
955 Industrial Road, San Carlos, CA 94070, USA