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CDi-99 Controller

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CDi-99 Recorder and Process Controller - Y2K Ready new
Industrial-strength datalogger and controller with large memory capacity and a ten man-year development history. Controls Temperature, pH, and up to eight Dissolved Oxygen diffusers or saturators, while allowing the operator to see all measurements, output states, and alarm conditions on its integral display. The unit features input channels with 1500 Volt galvanic isolation from system ground and from each other, as well as isolated communications links.
CDi99

Typical display. The asterisks indicate active outputs (1&3 in this example).

Sample VFD screen

Example of alarm display. The asterisk in the previous example has become an "A".

Sample VFD screen

dotLarge, 4 line x 20 Character VFD (Vacuum Fluorescent Display), perfect for indoor use, where ambient light is low. Polarizing lens increase contrast in high ambient light situations. An LCD version is available, but LCD technology does not match the brilliance, contrast and viewing angle of the VFD.
dot100% local and remote operation functionality (use with or without a computer).
dot1 Megabyte data storage area. One month, four channels @ 30 minutes = 20 Kbytes. CDi maximum capacity is 1024 Kb. Then 1024/20 = 51 months at these settings. 
dot8 analog inputs (15 bit resolution), 9 digital output channels (8 control + 1 alarm). The digital outputs can be "software tied" to inputs to form control loops.
dotBinary download (fast). Memory image download. No translation takes place in the unit. Up to 15 times faster than ASCII-based data.
dotProgrammable recording interval from one minute to three days with one minute resolution.
CDi analog channel backplane

Piggyback boarddot Allows user to mix and match channels at any time
dot Picture shows:

  1. a temperature module mounted at position 1
  2. two (2) jumpers at positions 2 and 3
  3. five (5) DO modules mounted at positions 4 through 8

dot The two jumper modules indicate there are 2 external pH modules in this system

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