Calibration

wizbang · 30th March 2006, 21:26

I think Steve is asking about actually calibrating the analog meter, not calibrating the rebreather/sensors.

If the sensors are reading correct and they are in 100% and you set the meter to read xxx%, as long as the meter returns to xxx% when the sensors are again in 100% then good.

That would be the difference between precision and accuracy.

Precision is what we want from the meter/gauge and accuracy is set by us during the rebreather calibration.

Jason Blackwell · 30th March 2006, 21:44

Quote: (Originally Posted by wizbang)

That would be the difference between precision and accuracy.

Precision is what we want from the meter/gauge and accuracy is set by us during the rebreather calibration.

That is too "deep" for this time in the morning.

Rich Sawkins · 30th March 2006, 22:46

Quote: (Originally Posted by Steve)

How do Prism owners currently calibrate their analogue secondary? Do you have to send it back to SMI periodicly to verify its accuracy?

If you are concerned about the gauge reading correctly you could set the secondary dial to S and set the setpoint to 1 ( or any of the other values ) and see what it reads on the gauge. Since this is part of the setup of the unit we do this as part of every build don't we boys .....

Mike · 31st March 2006, 00:10

Quote: (Originally Posted by Steve)

Not fishing at all. All the panel metres I have ever used needed calibration on an annual basis. How often does the PRISM one get done?

Process of deduction;
You dive with (at least) a couple of guys who dive Prisms.
You have obviously never seen them calibrate the secondary.
Ergo, they don't need calibration that often...

I validate the calibration after I've prepped my unit.
I prep my unit on a friday night.
After a hard week at work I need a few relaxing beers with my mates, then a Shiraz or two with dinner.
By the time I check the calibration, I can neither see the difference between .98 and 1.0, nor care very much.
Ergo, I actually change the calibration every month or so.

Mike

jdz · 31st March 2006, 01:17

You can't half tell it's Friday in Oz already....

Hi guys...

time to dive....

Cheers, JDZ

abowie · 31st March 2006, 12:00

As a bit of an aside Steve, are you planning on incorporating your new DSV calibration technique into your upcoming courses?

Chriso sent me a picture of how you did it on his unit. Perhaps he could post it here.

DaveC · 31st March 2006, 13:18

Quote: (Originally Posted by mverick)

You only have one?

I have 2 in the basement. One in the garage. One by the pool. One in the bedroom. And one in the Kitchen..

We're talking about beer here, right??? not women???

mverick · 31st March 2006, 13:47

Quote: (Originally Posted by DaveC)

We're talking about beer here, right??? not women???

I can't afford that many women.. LOL

DaveC · 31st March 2006, 15:30

Quote: (Originally Posted by mverick)

I can't afford that many women.. LOL

Ah too bad... I thought there was a GOD

Chris · 31st March 2006, 16:53

Quote: (Originally Posted by abowie)

As a bit of an aside Steve, are you planning on incorporating your new DSV calibration technique into your upcoming courses?

Chriso sent me a picture of how you did it on his unit. Perhaps he could post it here.

Steve’s special PRISM Calibration technique is a bit unorthodox to say the least. I don’t think it is really appropriate to be posting photos of how he accomplishes it on this mighty fine forum

Needless to say my DSV has been bathing in a tub of Virkon for the last 24 hours.

Cheers
Chriso

30th March 2006, 21:26	#11 (permalink)
wizbang WEB MERMEN Current Rebreather/s: Inspiration Classic Dolphin Home Build Other Rebreather/s: Not Bought Yet Inspiration Vision Evolution Prism Topaz Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Perth Australia Posts: 386	Re: Calibration I think Steve is asking about actually calibrating the analog meter, not calibrating the rebreather/sensors. If the sensors are reading correct and they are in 100% and you set the meter to read xxx%, as long as the meter returns to xxx% when the sensors are again in 100% then good. That would be the difference between precision and accuracy. Precision is what we want from the meter/gauge and accuracy is set by us during the rebreather calibration.
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30th March 2006, 21:44	#12 (permalink)
Jason Blackwell Bloody Rebreathers! Current Rebreather/s: Inspiration Classic Sport Kiss Optima Dolphin Ray Other Rebreather/s: Not Bought Yet Inspiration Vision Evolution Classic Kiss Dolphin Ray Join Date: Feb 2005 Location: Brisbane, Queensland, AUSTRALIA Posts: 361	Re: Calibration Quote: (Originally Posted by wizbang) That would be the difference between precision and accuracy. Precision is what we want from the meter/gauge and accuracy is set by us during the rebreather calibration. That is too "deep" for this time in the morning. __________________ Jason Blackwell TDI Instructor Trainer #1358 Optima...Inspiration/Evolution...KISS...and what is next??? www.divedivedive.com.au OZTeK '09 March 2009 Sydney, Australia www.diveoztek.com.au
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30th March 2006, 22:46	#13 (permalink)
Rich Sawkins New Member Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Sydney, Australia Posts: 74	Re: Calibration Quote: (Originally Posted by Steve) How do Prism owners currently calibrate their analogue secondary? Do you have to send it back to SMI periodicly to verify its accuracy? If you are concerned about the gauge reading correctly you could set the secondary dial to S and set the setpoint to 1 ( or any of the other values ) and see what it reads on the gauge. Since this is part of the setup of the unit we do this as part of every build don't we boys ..... Last edited by Rich Sawkins : 30th March 2006 at 22:53.
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31st March 2006, 00:10	#14 (permalink)
Mike Prism 'prentice Current Rebreather/s: Prism Topaz Other Rebreather/s: Inspiration Classic Evolution Join Date: Feb 2005 Location: Melbourne Posts: 328	Re: Calibration Quote: (Originally Posted by Steve) Not fishing at all. All the panel metres I have ever used needed calibration on an annual basis. How often does the PRISM one get done? Process of deduction; You dive with (at least) a couple of guys who dive Prisms. You have obviously never seen them calibrate the secondary. Ergo, they don't need calibration that often... I validate the calibration after I've prepped my unit. I prep my unit on a friday night. After a hard week at work I need a few relaxing beers with my mates, then a Shiraz or two with dinner. By the time I check the calibration, I can neither see the difference between .98 and 1.0, nor care very much. Ergo, I actually change the calibration every month or so. Mike __________________ Open ....... Closed Mind ........ Loop
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31st March 2006, 01:17	#15 (permalink)
jdz Prism Cave Diver Current Rebreather/s: Prism Topaz Dolphin Home Build Other Rebreather/s: Dolphin Home Build Join Date: Feb 2005 Location: Melbourne Australia Posts: 219	Re: Calibration You can't half tell it's Friday in Oz already.... Hi guys... time to dive.... Cheers, JDZ
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31st March 2006, 12:00	#16 (permalink)
abowie Fighting Girl Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: May 2005 Location: Land of Oz Posts: 573	Re: Calibration As a bit of an aside Steve, are you planning on incorporating your new DSV calibration technique into your upcoming courses? Chriso sent me a picture of how you did it on his unit. Perhaps he could post it here. __________________ Andrew Bowie Rebreather-friendly Buddy
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31st March 2006, 13:18	#17 (permalink)
DaveC New Member Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Prism Topaz Join Date: Mar 2005 Location: Ontario. Canada Posts: 192	Re: Calibration Quote: (Originally Posted by mverick) You only have one? I have 2 in the basement. One in the garage. One by the pool. One in the bedroom. And one in the Kitchen.. We're talking about beer here, right??? not women???
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31st March 2006, 13:47	#18 (permalink)
mverick ScubaPimp Current Rebreather/s: Megalodon Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Aug 2005 Posts: 541	Re: Calibration Quote: (Originally Posted by DaveC) We're talking about beer here, right??? not women??? I can't afford that many women.. LOL
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31st March 2006, 15:30	#19 (permalink)
DaveC New Member Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Prism Topaz Join Date: Mar 2005 Location: Ontario. Canada Posts: 192	Re: Calibration Quote: (Originally Posted by mverick) I can't afford that many women.. LOL Ah too bad... I thought there was a GOD
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31st March 2006, 16:53	#20 (permalink)
Chris Go Nude Or Go Home Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Megalodon Prism Topaz Sport Kiss Join Date: Feb 2005 Location: Perth, Western Australia Posts: 609	Re: Calibration Quote: (Originally Posted by abowie) As a bit of an aside Steve, are you planning on incorporating your new DSV calibration technique into your upcoming courses? Chriso sent me a picture of how you did it on his unit. Perhaps he could post it here. Steve’s special PRISM Calibration technique is a bit unorthodox to say the least. I don’t think it is really appropriate to be posting photos of how he accomplishes it on this mighty fine forum Needless to say my DSV has been bathing in a tub of Virkon for the last 24 hours. Cheers Chriso __________________ Megalodon Sorb and Sensors whilst in Australia www.divetub.com.au Diving & Photography @ www.uwphotog.com
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