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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
Posts: 1,296
Loc: Some Country
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Checking your PC gage
#7536312 - 10/19/07 04:50 PM (16 years, 3 months ago) |
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Ive only PCed 3or4 times and I have never checked my gage, should I? Do you?
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Chi Ro
Jive Ass Turkey


Registered: 09/22/07
Posts: 211
Loc: Right hurr!
Last seen: 12 years, 5 months
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Re: Checking your PC gage [Re: BUDDHA_702]
#7536331 - 10/19/07 04:54 PM (16 years, 3 months ago) |
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I always check my Pressure Cooker gauge. If you have one, you should be using it.
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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
Posts: 1,296
Loc: Some Country
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Re: Checking your PC gage [Re: Chi Ro]
#7536357 - 10/19/07 05:00 PM (16 years, 3 months ago) |
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I talking about having the gage pressure tested between batches.
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CaptainLinger
A Fungus Amongus


Registered: 05/25/07
Posts: 1,756
Last seen: 3 years, 7 months
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Re: Checking your PC gage [Re: BUDDHA_702]
#7536440 - 10/19/07 05:22 PM (16 years, 3 months ago) |
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You shouldn't be using the gauge for anything critical; as far as I'm aware Presto, Mirro, and every other manufacturer explicitly tell you the gauges are there only for a quick visual read on pressure. The rocker is, for obvious reasons (thanks, mr. boyle!), the definitive pressure measure.
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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
Posts: 1,296
Loc: Some Country
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let me be more clear. In the PC's instructions it says to take your gage and have it calibrated in between using it.
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WWorker
...

Registered: 09/09/07
Posts: 395
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Re: Checking your PC gage [Re: BUDDHA_702]
#7536544 - 10/19/07 05:42 PM (16 years, 3 months ago) |
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I don't....I go by the rocker. High until it rocks and then cut back to medium
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Chi Ro
Jive Ass Turkey


Registered: 09/22/07
Posts: 211
Loc: Right hurr!
Last seen: 12 years, 5 months
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Re: Checking your PC gage [Re: WWorker]
#7536553 - 10/19/07 05:45 PM (16 years, 3 months ago) |
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I wouldn't bother doing that, personally.
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monstermitch
Growing in Bags Doesn't Work



Registered: 02/10/06
Posts: 3,911
Loc: Arizona Bay
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Re: Checking your PC gage [Re: Chi Ro]
#7536612 - 10/19/07 05:59 PM (16 years, 3 months ago) |
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I have several All Americans. Every gage is off a bit here or there. They all read different things, I don't bother looking at them much.
I just pay attention to the weight. So no, I don't calibrate mine, nor do I see a need to. I don't even use them really.
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
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Quote:
In the PC's instructions it says to take your gage and have it calibrated in between using it
Welcome to the world of lawyers writing instruction manuals. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
Posts: 1,296
Loc: Some Country
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Re: Checking your PC gage [Re: RogerRabbit]
#7536682 - 10/19/07 06:26 PM (16 years, 3 months ago) |
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Good one less thing I have to do, thanks all
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n20forme
TRUSTED CULTIVATOR




Registered: 01/29/06 
Posts: 158
Loc: USA
Last seen: 11 years, 8 months
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Re: Checking your PC gage [Re: BUDDHA_702]
#7536719 - 10/19/07 06:40 PM (16 years, 3 months ago) |
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my pc starts shaking the "rattle" when it is higher than 15, n that is with a gage!
peace,
n20forme
p.s. ever been to harvestfest?
-------------------- "In the 60's we learned that in order to change the world, we must change ourselves first."
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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
Posts: 1,296
Loc: Some Country
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Re: Checking your PC gage [Re: n20forme]
#7537459 - 10/19/07 09:59 PM (16 years, 3 months ago) |
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Quote:
n20forme said: p.s. ever been to harvestfest?
No what is it?
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Culland
Stranger



Registered: 09/12/07
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Re: Checking your PC gage [Re: BUDDHA_702]
#7537565 - 10/19/07 10:52 PM (16 years, 3 months ago) |
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What if your petcock doesn't rock when it hits 15 PSI? I have a very old pressure cooker, National No. 7. I can see no noticeable difference when it hits 15 PSI by the guage. I have always gone by the gauge and assumed the gauge is mostly accurate, because when the gauge hits 20 the top gets lifted and it starts venting. Assumed if the gauge was off, it would be off at the 20 mark as well?
My rocker may not rock due to the fact that its always sputtering along? Not sure.
Cul
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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
Posts: 1,296
Loc: Some Country
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Re: Checking your PC gage [Re: Culland]
#7537582 - 10/19/07 10:59 PM (16 years, 3 months ago) |
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one of these 
Ifso I would use it for fear explosion. it looks like it has wood handles.
Edited by BUDDHA_702 (10/19/07 11:01 PM)
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Culland
Stranger



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Re: Checking your PC gage [Re: BUDDHA_702]
#7537591 - 10/19/07 11:02 PM (16 years, 3 months ago) |
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Thats totally it, well it has black wooden handles I had an even older one, but the seal eventually went on it and the handles cracked so I gave it up and just use this one now. Don't see how it could explode as long as the vent pops when it reaches too high a pressure, which it does. Also in the center where you cant see it in that picture is a safety release seal, never seen it happen but I imagine it pops right out at some high pressure.
Cul
Edited by Culland (10/19/07 11:06 PM)
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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
Posts: 1,296
Loc: Some Country
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Re: Checking your PC gage [Re: Culland]
#7537596 - 10/19/07 11:03 PM (16 years, 3 months ago) |
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it just looks dangerous.
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CaptainLinger
A Fungus Amongus


Registered: 05/25/07
Posts: 1,756
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Re: Checking your PC gage [Re: BUDDHA_702]
#7539088 - 10/20/07 12:09 PM (16 years, 3 months ago) |
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Cull--
That's the entire point of this thread...your rocker isn't "malfunctioning", it relies on a basic precept of physics. Your gauge however, needs to be calibrated; you are not reaching 15 psi.
In related news, you have to be batshit insane to be using that thing.
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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
Posts: 1,296
Loc: Some Country
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what year was it made in? the 60's I would sell it on ebay and buy a brand new one
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Culland
Stranger



Registered: 09/12/07
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Last seen: 17 days, 7 hours
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Why do you think its not getting to 15 PSI? If its getting enough PSI to pop the entire rocker up and vent as its supposed to at 20 PSI, then it has to be hitting 15 PSI. I have just gone with the assumption if the 20 PSI safety feature is working at 20 PSI on the gauge, then it should be close to the gauge at 15 PSI as well?
I have sorta looked at new ones, but they seam flimsy by comparison to mine.
Cul
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Culland
Stranger



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Re: Checking your PC gage [Re: BUDDHA_702]
#7540253 - 10/20/07 06:01 PM (16 years, 3 months ago) |
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Quote:
BUDDHA_702 said: what year was it made in? the 60's I would sell it on ebay and buy a brand new one
The manual that I have with it has a 1947 copy write, thats all I have to go on for year.
Cul
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CaptainLinger
A Fungus Amongus


Registered: 05/25/07
Posts: 1,756
Last seen: 3 years, 7 months
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Re: Checking your PC gage [Re: Culland]
#7540769 - 10/20/07 08:43 PM (16 years, 3 months ago) |
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I do not know how your PC works, so I don't know how the release valve works or how to explain it. The rocker, however, is based on incredibly simply physics (boyle's law). It's a metered weight on a metered area; there's absolutely no way for it to fail.
Quote:
My rocker may not rock due to the fact that its always sputtering along? Not sure.
Wait, what? "Sputtering along"? Once pressure is released you've reached the stated pressure. You should be *stopping* and turning the heat down the second that starts happening. Explain. The actual "rocking" motion is completely irrelevent.
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Culland
Stranger



Registered: 09/12/07
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Last seen: 17 days, 7 hours
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Well here is my running theory. I don't think my petcock seals properly any more, so while its pressuring up its always leaking a tiny bit from the petcock. Sometimes I see a drop of water fall, whiffs of steam, and it makes a 'sputtering' as the water drips and burns off. Not sure how else to describe it sorry I think it's likely not pressuring up as fast as it could as a result, but it does pressure up.
When it hits 15 PSI on the gauge I turn down the heat and let it maintain that pressure till the necessary time has past, all the while the petcock will be sputtering along, but it doesn't actually 'rock' in place, nor does it sound or act any different at 15 PSI then it did at 10 PSI or 5 PSI. In testing if I let the pressure climb to 20 PSI the petcock will get forced up by the pressure and start venting steam in force as soon as it hits the 20 PSI mark and into the 'caution' area. After a few seconds of serious venting, the petcock drops back down and sputters along till I hit 20 again.
So in short I think my petcock never gets to a rocking point because its leaking just enough to not lift the petcock to a rocking motion, but not enough to prevent it from pressuring up. My secondary theory is that if the petcock pops ups at 20 PSI like it should, then the gauge is measuring the pressure accurately at 20 PSI and thus likely fairly accurately at 15 PSI as well.
Feel free to shoot my theories to hell I really do think the thing is safe though. May not be working up to snuff, but safe.
Cul
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