<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:14pt"><div><span>Hi Alec,</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>Thanks for the explanation, I'm a bit vague on these things & it looks like I'll have to learn.</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>I'm probably about 6 months off making a decision on a PLC but that looks like what</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial,
'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>I need. I had been looking at using a rebreather system for life support, where they</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>monitor the input of 3 O2 sensors & take the average reading of the closest 2. </span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>James Cameron had his life support system </span><span style="background-color: transparent;">based </span><span style="background-color: transparent;">on the rebreather & built by </span><span style="background-color:
transparent;">Ambient </span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color: transparent;">Pressure </span><span style="background-color: transparent;">Diving who make the Inspiration rebreather.</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color: transparent;">I was going to approach APD but It seems a relatively easy system to replicate on a PLC. </span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;
font-style: normal;"><span style="background-color: transparent;">I like the electronic compass I posted, with the yaw pitch & roll & graphics software.</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color: transparent;">They state.......</span><span style="font-family: Arial; font-size: small;"> </span><span style="font-family: Arial; font-size: small;">The 5000-US software includes a USB to serial port driver, facilitating a quick connection between the compass and your Windows based system. Compasses can also be connected to a host system using Microsoft Hyperterm or other terminal programs.</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida
Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color: transparent;">I am not sure if I can connect this to a PLC with Microsoft Hyperterm. But buying something with the</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color: transparent;">graphics program already written would be a big advantage. Any knowledge as to whether I</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color: transparent;">can connect this to any PLC?</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family:
HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color: transparent;">I took a photo of the Triton computer/PLC. (attached bottom of page) It does have a windows logo </span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color: transparent;">on the keyboard </span><span style="background-color: transparent;">but I think the screen detaches & runs independantly, so may be a PLC. </span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color:
transparent;">All confusing </span><span style="background-color: transparent;">to me. See what you think.</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="background-color: transparent;">Alan</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span><br></span></div><div><br></div> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 14pt;"> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font size="2" face="Arial"> <b><span
style="font-weight:bold;">From:</span></b> "Smyth, Alec" <Alec.Smyth@covisint.com><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, January 15, 2014 3:23 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Compass Choice<br> </font> </div> <div class="y_msg_container"><br><div id="yiv5864668152"><style>#yiv5864668152 #yiv5864668152 --
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<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;">Hi Alan,</span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;"> </span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;">I think Triton use a PLC, because I spied a switch labeled “PLC Off” on their control panel. Years ago I got a PLC, a touch screen, and all the associated sensors
together, and wrote the code for it. Cliff and I picked the same equipment and shared our code, and you may have seen his R-300 runs everything off a touch screen. It’s a very neat approach because you can let the PLC concentrate on background monitoring (e.g.
O2 levels, pressures) while letting the pilot concentrate on the driving. Personally, I’m headed in the opposite direction nowadays, designing my new boat to have minimal electronics for reliability and ease of maintenance. But I still have a box full of all
this hardware, and if anyone is interested in installing it on their sub they can have it for a tiny fraction of what it would cost new.</span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;"> </span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;">A PLC is a sort of industrial computer, much simpler and more rugged than a PC. It has no hard drive to fail, and you won’t get the “blue screen of death” like
on a PC. The logic runs in a continuous loop, monitoring parameters and taking action when conditions you specify are met. For instance, for life support you can say if cabin pressure drops below X, then open a valve to inject O2. Later in the loop, a similar
clause would close the valve if cabin pressure rises above Y. The scrubber would remove CO2 continuously, and the PLC add O2 to keep the cabin pressure between X and Y. Other alarms would go off if tank pressures are getting too low, if max depth is exceeded,
etc. etc. </span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;"> </span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;"> </span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;">Best,</span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;"><br clear="none">
Alec</span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;"> </span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;"> </span></div>
<div class="yiv5864668152MsoNormal"><span style="font-size:11.0pt;"> </span></div>
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<div class="yiv5864668152MsoNormal"><b><span style="font-size:11.0pt;">From:</span></b><span style="font-size:11.0pt;"> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org]
<b>On Behalf Of </b>Alan James<br clear="none">
<b>Sent:</b> Tuesday, January 14, 2014 2:02 AM<br clear="none">
<b>To:</b> Personal Submersibles General Discussion<br clear="none">
<b>Subject:</b> Re: [PSUBS-MAILIST] Compass Choice</span></div>
</div>
</div>
<div class="yiv5864668152MsoNormal"> </div>
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<div class="yiv5864668152MsoNormal" style="background:white;"><span style="font-size:14.0pt;">Hi Douglas,</span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">I'll do a bit of homework on this.</span></div>
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<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">I had a look at the Triton 3000 when it visited N.Z. & it was monitoring</span></div>
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<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">just about everything off a computer. They were talking of moving to</span></div>
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<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">smaller computers & maybe strapping them to their thighs, so that the screen</span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">didn't impinge on their view. Other submersibles I've seen similarly monitor</span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">a lot of functions off the computer.</span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">I like this little computer with a 4.8" screen.</span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;"><a rel="nofollow" shape="rect" target="_blank" href="http://www.dynamism.com/top-notebooks/viliv-s5-premium.shtml">http://www.dynamism.com/top-notebooks/viliv-s5-premium.shtml</a></span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">It runs windows so would be compatable with the Ocean Server compass.</span></div>
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<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">Cheers, Alan</span></div>
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<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;"> </span></div>
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<div class="yiv5864668152MsoNormal" style="background:white;"><span style="font-size:14.0pt;"> </span></div>
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<span style="">
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<div class="yiv5864668152MsoNormal" style="background:white;"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;"> Douglas Suhr <<a rel="nofollow" shape="rect" ymailto="mailto:spiritofcalypso@gmail.com" target="_blank" href="mailto:spiritofcalypso@gmail.com">spiritofcalypso@gmail.com</a>><br clear="none">
<b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
<br clear="none">
<b>Sent:</b> Tuesday, January 14, 2014 4:59 PM<br clear="none">
<b>Subject:</b> Re: [PSUBS-MAILIST] Compass Choice</span><span style=""></span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal" style="background:white;"><span style=""> </span></div>
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<div class="yiv5864668152MsoNormal" style="background:white;"><span style="">Nice find Alan. I'm going to spend some time looking over that site. I have to admit though, I feel the same as you in terms of not wanting to run my
compass off a computer. To me, computers should be benefitted from but not relied upon unconditionally. ~ Douglas S. </span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal" style="margin-bottom:12.0pt;background:white;"><span style=""> </span></div>
<div>
<div class="yiv5864668152MsoNormal" style="background:white;"><span style="">On Mon, Jan 13, 2014 at 10:45 PM, Alan James <<a rel="nofollow" shape="rect" ymailto="mailto:alanlindsayjames@yahoo.com" target="_blank" href="mailto:alanlindsayjames@yahoo.com">alanlindsayjames@yahoo.com</a>> wrote:</span></div>
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<div class="yiv5864668152MsoNormal" style="background:white;"><span style="font-size:14.0pt;">Hi Jon,</span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">I found this off the shelf unit for $250- (made in USA) It is designed for marine applications</span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">& has yaw, pitch & roll which is a G.L. requirement. So it's looking attractive.</span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;"><a rel="nofollow" shape="rect" target="_blank" href="http://www.ocean-server.com/compass.html">http://www.ocean-server.com/compass.html</a></span></div>
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<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">It looks like I would have to run it off a computer though, which I didn't want to do,</span></div>
</div>
<div>
<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">but may be forced down this path. </span></div>
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<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;">Alan</span></div>
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<div class="yiv5864668152MsoNormal"><span style="font-size:14.0pt;"> </span></div>
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<div class="yiv5864668152MsoNormal" style="background:white;"><span style="font-size:14.0pt;"> </span></div>
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<div class="yiv5864668152MsoNormal" style="background:white;"><b><span style="">From:</span></b><span style=""> Jon Wallace <<a rel="nofollow" shape="rect" ymailto="mailto:jonw@psubs.org" target="_blank" href="mailto:jonw@psubs.org">jonw@psubs.org</a>></span><span style=""></span></div>
<div>
<div class="yiv5864668152MsoNormal" style="background:white;"><span style=""><br clear="none">
<b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
</span></div>
</div>
<div class="yiv5864668152MsoNormal" style="background:white;"><b><span style="">Sent:</span></b><span style=""> Tuesday, January 14, 2014 2:09 PM</span></div>
<div>
<div class="yiv5864668152MsoNormal" style="background:white;"><span style=""><br clear="none">
<b>Subject:</b> Re: [PSUBS-MAILIST] Compass Choice</span></div>
</div>
</div>
<div>
<div class="yiv5864668152MsoNormal" style="background:white;"><span style=""> </span></div>
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<div class="yiv5864668152MsoNormal" style="background:white;"><span style=""><br clear="none">
A tilt-compensated electronic compass (three axis, plus three axis <br clear="none">
accelerometer) would work connected to a small microcontroller like the <br clear="none">
Arduino UNO. The HMC6352 was the standard but Honeywell stopped <br clear="none">
producing them. There are others however but probably more expensive. <br clear="none">
The display could be a nice four digit LED (under two inches).<br clear="none">
<br clear="none">
Jon</span></div>
<div>
<div class="yiv5864668152MsoNormal" style="background:white;"><span style=""><br clear="none">
<br clear="none">
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</blockquote>
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