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
PDL/CDi History Version 1.0: PDL1 to PDL4 Datalogger
PDL/CDi History Version 1.0: PDL5
PDL/CDi History Version 1.0: CDi2/PDL6, the PDL that Wasn't
PDL/CDi History Version 1.0:
PDL/CDi History Version 1.0: Pembina Lake Erie Datalogger
PDL/CDi History Version 1.0: P5 Switcher
PDL/CDi History Version 1.0: P7 Switcher
PDL/CDi History Version 2.0

PDL/CDi History Version 1.0: ZDL5 Switcher
PDL/CDi History Version 1.0: CDi3.FTe Switcher
PDL/CDi History Version 1.0: CDi3.RMe Switcher
PDL/CDi History Version 1.0: Remote 900 MHz RF Link
PDL/CDi History Version 1.0: CDi99 Libby Flow Meter
Lake Erie Tech Roadmap
The PDL/CDi Hall of Fame has been forever closed since 2002, see "Contributions" here. The new way of acknowledging individuals who helped advance the cause, the cause being excellence in measuring things and controlling things at the bottom of lake Erie, is to simply add an individual's initials or nickname to the name of the product. So "RMe" means measuring differential pressure using a Keller digital differential transmitter, field-proven the last couple of years, affectionately named after our very own Ross M. for wanting a line controller for frequently loading well 224A way back in 2004, and for supporting all things "switching". "FTe" means measuring differential pressure using a reinforced solenoid, "Plan B", affectionately named after our very own Franko Tanko for showing up early in 2006 and supporting development of plunger lifts and gas lifts and switchers in general.
A new board is needed to accommodate the new DS1553/DS1554 RTC, because the CP82C54 timer is no longer necessary, and because the ADC MAX135 is being replaced by the NAU7802. Since there is no longer much similarity of these new units with the "PDL", "Px" designations will be dropped in favor of the "CDix" ones. All of this means there will be four units shortly: CDi3.RMe and CDi3.FTe which will take care of lake Erie needs for the foreseeable future plus two more, industrial versions, just in case the CDi escapes outside of the immediate lake Erie vicinity. These two will be designated CDi4.RMe and CDi4.FTe. The new boards should be available by April, 2016 and when this becomes fact, I can finally call this project "FINISHED". Spring 2016. Adam
Now that the ZDL5 has been proven in the field, I can, finally, call this project FINISHED. But you know, when I called this document "The lake Erie tech roadmap" I didn't actually expect to ever have to use road signs in it. Adam, Aug. 29th, 2017.
R&D shelved indefinitely, nothing here for sale, try Walmart. Locked and put away at LoggerLand5, partial unlock code is "neene". Adam, 2017/10/28
Click to download power consumption spreadsheet for all current devices.
<-- The Past
<-- The Present -->
The Future -->
Stone Age
<-- Analog Pressure Metrology, Calibration Required, ZDL5 the only exception
Digital Pressure Metrology, Calibration Not Required -->
<-- Battery Chemistry: Lead-Acid
Battery Chemistry: NiMH -->
<-- Remote Communications: No
Remote Communications: Yes -->
Soft: RTMS
Soft: WinRTMS
CDi1 or CDi/PDL5
Soft: WinRTMS, Switcher
Soft: CDiComm
Soft: WinRTMS
Soft: CDiComm
CDi3 RMe or FTe
Soft: CDiComm+
CDi4 RMe or FTe
Soft: CDiComm+
PDL/CDi History: PDL1 to PDL4 Datalogger
PDL/CDi History: CDi99 Libby Flow Meter
PDL/CDi History: PDL5
CDi.P5.Sw Submersible Natural Gas Flowmeter and Intermitter
PDL/CDi History: CDi2/PDL6, the PDL that Wasn't
CDi3.P7 Submersible, Universal, Gas-Field Controller
Yet to be born...
NSC800N-3i, more info
Program ROM
32Kx8, AT28C256
64Kx8, GLS29EE512-70-4C
64Kx8, GLS29EE512-70-4I
2 UARTs in Z8S180 CPU chip
MAX243, RS232
MAX485, RS485
MAX485E, RS485
Baud Rate
Board "ON" Time
11 Secs
9 Secs
6 Secs
3 Secs
6 Secs
1.2 Secs
Pressure TRs "ON" time
9 Secs
8 Secs
6 Secs
<1 Sec
6 Secs
<1 Sec
<1 Sec
8 Analog
3 Keller Digital
8 Analog
8 Analog + 8 Digital
Up to 128, Keller Digital
10AHr, Lead-Acid
14AHr, Lead-Acid
1.1AHr, Lead-Acid
10AHr, NiMH
RTC: Real Time Clock
Not Applicable
ADC: A/D Converter
+-15-bit, MAX135
+-23-bit, NAU7802
1MBx8, 2x AS6C4008-55PCN
2MBx8, 4x AS6C4008-55PIN
Storage Format
16-bit integers
32-bit integers
0C to +70C
-40C to +85C
1994 and 1995. Original datalogger on the left. Improved wiring version on the right.The black box on bottom left is a Multi plunger lift. The cream coloured thing next to it is the 8-bit-resolution datalogger. The green boards attached to the orange connectors are range amplifiers. They were necessary due to the very low resolution (8 bit) of the A/D converter in the datalogger. They required 24 Volts and that explains the 2, 12 Volt batteries wired in series.
1995. Datalogger production line at Loggerland1 in Port Maitland.
1994. Loggerland1 floor.
1996. Loggerland1 bench. Computer running RTMS (daddy to WinRTMS) and aluminum box with PDL1 board in it. This very simple setup has proven extremely reliable and versatile... most are still around.
1999. CDi99 (PDL5) Prototype
April 2013. CDi2 on its way to becoming CDi4...
April/May 2001. First Dry CDi99.P5, PM Station
April/May 2001. First Dry CDi99.P5, PM Station. Please note the worst possible transmitter was purposely used, so that it would change with temperature. The point is BOTH pressures change with temperature, differential value unaffected.
Summer 2000. CDi2.P6 memory board
2006. Final wire isolation method.
2009. First attempt to implement quick connectors. Cylinders now have machine threads.
CDi3.P7 Board
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Copyright © 1991-2018 AdamG Last Update: Sunday, December 10, 2017 1:39:14 PM