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WeighPod - Loadcell Digitiser
  weighpod board   weighpod plan view  
  The WeighPod Mk1 is a high speed load cell amplifier / signal conditioner with digital output.  
         
        Main Features   Specification
 
  • All weight indicator functions available
  • Weight values ready for display
  • Power supply 12 - 24 V dc
  • Excitation 10 V dc
  • Drive for 1 - 4 Load Cells with 350 ohm bridge
  • 6.25 - 960 conversions / second
  • Selectable Analog and Digital Filtering 24 bit Internal resolution
  • Outputs RS232, RS422/485, CAN Bus. Baud rates selectable.
  • Multidrop Communications up to 32 devices (RS485), 99 devices (CAN Bus)
  • Address Rotary switch selectable 0-99
  • Approved EN45501 to 6000 divisions
  • Optional metal case to IP67
  Power Supply   12V-24V DC
Maximum Readout   +/- 99999
Measurement   6-wire sense system for 1-4 loadcells
Sample Rates/Second 50Hz: 6.25, 12.5, 25, 50, 100, 200, 400, 800
  60Hz: 7.5, 15, 30, 60, 120, 240, 480, 960
Resolution   +/- 130000 or +/- 260000 bits
Excitation Voltage   10V DC (+/- 5V)
Wiring   Full Wheatstone bridge with sense
Sensitivity   2mV/V. Other values on request
Dead Load   Full digital offset
Temperature Range   Operating: -10 to +40 °C. Storage: -25 to +80 °C
Linearity Error   0.003% FS max.
Span Stability   2.7ppm/°C
Zero Stability   100nV/°C
RFI Protection   Signal, excitation and sense lines protected by feed-through capacitors
 
    Polarity   Bipolar
      Input overload   All loadcell inputs will withstand connection to excitation voltages
   
      Analogue filter   24dB/octave (80dB/decade). 4 cut-off frequencies DIL switch selectable: 1.3Hz, 2Hz, 3Hz, 5Hz
   
      Digital filter   Selectable IIR or FIR. Butterworth, Gaussian, Bessel. 1 - 14Hz
   
      Calibration   Software calibration and set-up
      Communication   RS232, RS422 / RS485, CAN bus
      Baud rates   DIL switch selectable: 1200, 2400, 4800, 9600, 19200, 57600, 115200
 
      Approval (NWML)   EN45501 6000 divisions, 1uV/VSI
      Bus   RS485 up to 32 devices, CAN up to 99 devices
      Housing (optional)   Alochrome aluminium 130 x 57 x 28mm to IP67. DIN rail mountable