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 Specifications


A/D CONVERTERS

  • Opto 22 SNAP I/O controllers:
    • 16 bits per sample
    • 20,000 levels of resolution, 0.005% maximum quantization error (when used with 4-20 mA field inputs)
    • Pluggable modules available which support a variety of analog signal standards, with and without optical isolation between inputs
    • Ethernet
      • 300-foot maximum distance between PC and controller (can be extended using Ethernet switches)
    • Serial
      • Interfaces to PC serial port with RS-485 to RS-232 converter at 38,400 bits/second (Optomux) or 115,200 bits/second (mistic)
      • 4000-foot maximum distance between PC and ADC
  • B&B Electronics 232SDA12
    • 12 bits per sample
    • 3276 levels of resolution, 0.031% maximum quantization error (when used with 4-20 mA or 1-5 V field inputs)
    • Interfaces to PC serial port via. RS-232C cable at 9600 bits/second
    • Eleven non-isolated 0-5 V field inputs (convertible from 4-20 mA - see AquaServ Administrator's Guide)
    • 50-foot maximum distance between PC and ADC (using shielded cable)
    • Ideal for temporary or portable AquaServ deployments

TEMPORAL ACCURACY

  • Effective A/D converter polling interval: 0.1 seconds (0.5 seconds if using the B&B 232SDA12)
  • Real-time totalizers updated every 100 ms
  • On-screen chart updated every 5 seconds
  • Data stored to disk every 5-1800 seconds (configurable)
  • Temporal resolution depends on horizontal resolution of screen and printer:
    • 113 seconds on a 1024-pixel-wide display
    • 90 seconds on a 1280-pixel-wide display
    • 35 seconds on a 300 DPI printer
    • 17 seconds on a 600 DPI printer

MEASUREMENT UNITS SUPPORTED

  • Millions of Gallons per Day (MGD) *
  • Gallons Per Day (GPD) *
  • Gallons Per Minute (GPM) *
  • Cubic Feet per Second (CFS) *
  • Gallons
  • Feet
  • Degrees Fahrenheit
  • Millions of Liters per Day (MLD) *
  • Liters Per Day (LPD) *
  • Liters Per Minute (LPM) *
  • Cubic Meters per Second (CMS) *
  • Liters
  • Meters
  • Degrees Celcius
  • Pulses per Second (PPS) *
  • Pulses per Minute (PPM) *
  • Milligrams per Liter (mg/L)
  • NTU
  • Pounds per Square Inch (PSI)
  • pH
  • Other *

(* = totalizer active. For "Other", the totalizer counts in items per second.)


 


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