<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Cliff this was very helpful, thank you.</div><div><br><br>Lasse Schmidt<div>Upplevelseakuten</div><div>Skeppsbron 21, Tullhus 1</div><div>11130 Stockholm</div></div><div><br>19 sep 2014 kl. 15:00 skrev "Cliff Redus via Personal_Submersibles" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>:<br><br></div><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div><span></span></div><div></div><div><font face="Times New Roman" size="3">
</font><div style="margin: 0in 0in 10pt;"><font face="Calibri"><font size="3">Lasse,</font></font></div><div style="margin: 0in 0in 10pt; color: rgb(0, 0, 0); font-family: Calibri; font-size: 16px; font-style: normal; background-color: transparent;"><font face="Calibri"><font size="3">It would be very straight forward to build your own depth
measuring and display system that could also tell you if your are going up or
downs.</font><span style="mso-spacerun: yes;"> </span><font size="3">The parts would be a simple PLC
with at least one analog input channel, a 0-10 vdc pressure transmitter to measure ambient water pressure and
inexpensive display. </font><span style="mso-spacerun: yes;"> </span><font size="3">Ladder logic would
be easy to right as all you are doing calculating depth as a function of
pressure and density.</font><span style="mso-spacerun: yes;"><font size="3"> </font></span><font size="3">Again simple
calculation in PLC to determine if you are ascending or decending based on pressure
change i.e, if ambient pressure is increasing, you are descending and
descreaing, you are ascending.</font></font></div><font face="Times New Roman" size="3">
</font><ol style="list-style-type: decimal; direction: ltr;"><li style="color: rgb(0, 0, 0); font-style: normal; font-weight: normal;"><div style="color: rgb(0, 0, 0); font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt; mso-list: l0 level1 lfo1;">Cheap PLC ($129) <a href="http://www.automationdirect.com/adc/Shopping/Catalog/Programmable_Controllers/CLICK_Series_PLCs_(Stackable_Micro_Brick)/PLC_Units/C0-02DD2-D">http://www.automationdirect.com/adc/Shopping/Catalog/Programmable_Controllers/CLICK_Series_PLCs_(Stackable_Micro_Brick)/PLC_Units/C0-02DD2-D</a></div></li><li style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal;"><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt; mso-list: l0 level1 lfo1;">Cheap pressure transmitter ($125) <a href="http://www.automationdirect.com/adc/Shopping/Catalog/Sensors_-z-_Encoders/Pressure_Sensors/Pressure_Transmitters/Ceramic_Sensing_Element_-_M12_Cable_Connection/PTD25-10-0200H">http://www.automationdirect.com/adc/Shopping/Catalog/Sensors_-z-_Encoders/Pressure_Sensors/Pressure_Transmitters/Ceramic_Sensing_Element_-_M12_Cable_Connection/PTD25-10-0200H</a></div></li><li style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal;"><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt; mso-list: l0 level1 lfo1;">Cheap display ($161) <a href="http://www.automationdirect.com/adc/Shopping/Catalog/Operator_Interfaces/C-more_Micro-Graphic_Panels/3_inch_Panels_-a-_Accessories/EA1-S3ML-N">http://www.automationdirect.com/adc/Shopping/Catalog/Operator_Interfaces/C-more_Micro-Graphic_Panels/3_inch_Panels_-a-_Accessories/EA1-S3ML-N</a></div></li><li style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal;"><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt; mso-list: l0 level1 lfo1;">Cheap software ($0) to program the PLC <a href="http://www.automationdirect.com/adc/Shopping/Catalog/Programmable_Controllers/CLICK_Series_PLCs_(Stackable_Micro_Brick)/PLC_Units/C0-00DR-D">http://www.automationdirect.com/adc/Shopping/Catalog/Programmable_Controllers/CLICK_Series_PLCs_(Stackable_Micro_Brick)/PLC_Units/C0-00DR-D</a></div><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt;"> </div><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt;">and Display <a href="http://support.automationdirect.com/products/cmoremicro.html">http://support.automationdirect.com/products/cmoremicro.html</a></div><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt;"> </div></li><li style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal;"><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt;
mso-list: l0 level1 lfo1;">Total cost $415</div><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt;"> </div></li><li style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal;"><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt;">Of course if you already had a PLC for boat
systems, then all you would need is pressure transmitter and a bit of ladder logic programming.</div></li><li style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal;"><div style="color: rgb(0, 0, 0); font-family: "Calibri","sans-serif"; font-size: 11pt; font-style: normal; font-weight: normal; margin-top: 0in; margin-bottom: 0pt;">Finally, you can always go old school install a manual
depth gage <a href="http://www.weksler-gauges.com/pdf/p22.pdf">http://www.weksler-gauges.com/pdf/p22.pdf</a></div></li></ol><font face="Times New Roman" size="3">
</font><br><br><br>Cliff</div><div><br></div><div><br></div> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <div style="margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); border-image: none; height: 0px; line-height: 0; font-size: 0px;" contenteditable="false" readonly="true"></div> <font face="Arial" size="2"> <b><span style="font-weight: bold;">From:</span></b> Lasse Schmidt via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, September 19, 2014 4:18 AM<br> <b><span style="font-weight: bold;">Subject:</span></b>
[PSUBS-MAILIST] Pressure change indicator?<br> </font> </div> <div><br>Hi,<br><br>I´m interested in finding two instruments, I hope I can get some pointers from you guys.<br>First of all, i´d like to find an instrument that shows if the sub is rising or descending, like the ones found in airplane (variometer). I have googled and googled but can´t find anything.<br>Does anyone have any suggestions how i can see (with an instrument) if the sub is stationary or moving up and down?<br><br>Secondly, I´m looking for a digital solution to show my passengers how deep we are (or what pressure is outside), I have been told that there are such instruments but could´t find any.<br><br>All pointers and suggestions to specific products is appreciated.<br>Below is a news coverage about our sub, made by swedish television.<br><a href="http://www.tv4.se/nyhetsmorgon/klipp/maria-forsblom-pr%C3%B6var-livet-under-ytan-2784847" target="_blank">http://www.tv4.se/nyhetsmorgon/klipp/maria-forsblom-pr%C3%B6var-livet-under-ytan-2784847</a><br><br><br>Cheers, Lasse<br><br><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br></div> </div> </div> </div></div></blockquote><blockquote type="cite"><div><ATT00001.c></div></blockquote></body></html>