Take me home
CDi3.FTe Submersible, Universal Gas-Field Controller
Keller Digital Pressure Transducers/Transmitters
Burkert Solenoid Modifications
PDL/CDi History: Pembina Lake Erie Datalogger
LD Series Pressure Transmitters
CDi.P5.FTe Submersible Natural Gas Flowmeter
CDi3.FTe Submersible, Universal, Gas-Field Controller
Long Range RF Link (900MHz)
Switcher Remote Monitoring and Control Software
CDi.P5.Sw Submersible Natural Gas Flowmeter and Intermitter
CDi3.FTe Submersible, Universal, Gas Field Controller
CDi3.RMe Submersible, Universal, Gas Field Controller

Lake Erie datalogging/control operations went digital in 2011 after the introduction of the prototype P7MAIN board and associated charger and memory boards. Five systems were built and delivered by June 2011, some firmware bugs were subsequently discovered and corrected, all are alive and well today. The design is actually a set of three boards, a main board plus a charger and memory boards. P7MAIN original combined layers design and individual layers design, charger combined layers design and individual layers design, memory board combined layers and individual layers. Some shortcomings in the original have been addressed in the new CDi3.P7 and CDi3.LE boards. These two additional boards are meant to take care of lake erie operation needs as they manifest now, in the near future, or even later. The CDi3.P7 takes care of things now, the CDi3.LE board takes care of things later, and as a result P7MAIN has been deprecated and will never be built again. The two new boards are much the same as the original but have several enhancements as explained below:

  1. Clock increase from 6.144MHz to 7.373MHz resulting in a maximum baud rate of 115.2K for both communication channels.
  2. Ability to use the newer DS1553 RTC, since the DS1386 is now obsolete but still available in the aftermarket.
  3. Design preserves the original 8-channel analog circuitry, multiplexer is not used in digital modes, ADC only there to read the battery voltage.
  4. Added a Bluetooth wireless interface to the main communications channel.
Typical plot output from a group intermitter recorded over the 2011-2012 winter. There is about 2 miles of upstream pipeline behind this one. Significant line pressure reductions have been achieved...
Switcher3, visual operational, communications and charting functionality software.
CDi3.RMe Submersible, Universal, Gas Field Controller
  • All Keller-digital pressure measurement, universal gas field controller, 11"x11"x11" cube, implements Keller comms protocol.
  • Designed to be perfectly comfortable at the bottom of Lake Erie, can be used as a line controller, plunger lift, intermitter, etc.
  • Fully-on, fully-off type of controller. Wakes up, reads everything, stores everything, operates the switch if it has to, and goes back to sleep 2.1 seconds later.
  • Programmable interval from 1 minute to 24 hours, with one minute resolution. Due to this operating mode, it can run without recharge for years.
  • Supports RS485, master-slave, wired or wireless networks at up to 115.2Kbits/sec.
  • Local RS485 network to "talk" to its Keller pressure transmitters at up to 115.2Kbits/sec.
  • State-of-the-art PA10LHX singles and PD10LHX differential Kellers, all Hastelloy C276 construction, sourced from Keller in Switzerland.
  • Field-replaceable differential and switching cylinders, pressure transmitters.
Submersible Intermitter/Plunger Lift
Land Plunger Lift
Routine installation example @ lake bottom.
Land Plunger Lift
Reading (Differential) Cylinder
316L Differential Cylinder with Hastelloy Differential Keller (PD10) Housing
Switching Cylinder
316L Switching Cylinder with Burkert Solenoid
  • 316L cylinder contains a latching type of solenoid, sourced from Burkert in Germany and a 10,000psi penetrator originally sourced from Impulse in California (now a Teledyne Company).
  • The solenoid can switch at pressures of up to 140psi, so it is meant to be supplied through a pressure regulator. The lake operation has had a 20-year period of successfully using these 6V, low-power, media-isolated, latching type of valves.
  • Waterproof, quick connectors allow very fast change-out of the entire cylinder in the field.
  • The solenoid is used as a pilot valve to operate a pneumatic actuator which in turn does the actual well switching.
Keller Digital Singles
Keller Singles, Submersible Version
  • Keller PA10 series, 0.05%FS-class-over-temperature pressure transducer, coupled with a Xemics XE8805A-based (now Semtech) board.
  • Hastelloy C276 business end, all other metal 316L, 4-wire connection, 2 committed to power, the other 2 for either digital communication or analog output, mechanical pdf drawing here.
  • See this page for more info on the Kellers.
PVC Frame
PVC Frame
  • Supporting frame made of PVC stock with 316 SS hardware, original design by Adam-Meister of the Welland Meister Club, perfected and built like a tank by Steve-O-Meister of the Port Colborne Meister Club.Top
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Copyright © 1991-2017 AdamG Last Update: Thursday, June 15, 2017 11:48:33 AM