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jackhkau
註冊時間: 2008-02-28 文章: 106
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發表於: 星期三 七月 18, 2012 5:56 pm 文章主題: Expobar 改電子控制鍋爐蒸氣壓力 |
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改左用電子控制
吾使用原裝pressurestat
可以任意調較

jackhkau 在 星期四 七月 19, 2012 12:35 am 作了第 1 次修改 |
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bib
註冊時間: 2007-04-21 文章: 786
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發表於: 星期三 七月 18, 2012 8:28 pm 文章主題: |
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wow high tech ar...
but sorry to ask there is a 0.05bar dead band pressurestat.
electronic one more durable and better ?
Thanks for teaching.
0.05 bar pressurestat data sheet:
http://www.barksdale.com/download/?dl=505
mine is 0.2-0.3bar , due to the durable issue, I have given up the upgrade.
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jackhkau
註冊時間: 2008-02-28 文章: 106
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發表於: 星期三 七月 18, 2012 9:58 pm 文章主題: |
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用壓力控制,保證打奶壓力
其實PID 去控制水溫,反應會快d
用壓力PID去控制會有delay
現時個控制是0.80bar,加熱去到0.88bar
水溫98~99
仲試緊setting
改左,我吾使較PStat去改壓力
if you own a dual boiler machine, dont waste money to do upgrade like this.
It wont give you too much different.
Someone come with a "home made" pressure profile upgrade, which is great.
Ps .請大家吾咁輕易去改expo bar ,基本每一樣都要定做 |
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alexfan
註冊時間: 2008-09-18 文章: 266
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發表於: 星期四 七月 19, 2012 6:43 am 文章主題: |
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Do you keep the original PSTAT (set to just higher than the PID pressure) in serial with the PID control (SSR) ? In case of the PID fail (always on), the PSTAT could be the final protection. |
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jackhkau
註冊時間: 2008-02-28 文章: 106
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發表於: 星期四 七月 19, 2012 10:41 am 文章主題: |
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It has a safety valve @ 2 bar something
I tested, no problem.
I foundD out inside no space to keep the original pstat.
Also You have to refit the copper tube.
Alexfan I like you pressure profile upgrade. Is it good? |
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alexfan
註冊時間: 2008-09-18 文章: 266
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發表於: 星期四 七月 19, 2012 9:50 pm 文章主題: |
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jackhkau 寫到: | It has a safety valve @ 2 bar something
I tested, no problem.
I foundD out inside no space to keep the original pstat.
Also You have to refit the copper tube.
Alexfan I like you pressure profile upgrade. Is it good? |
Understand.
Yes, but do not have time to tune the PID and profile for the brewing pressure. |
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bib
註冊時間: 2007-04-21 文章: 786
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發表於: 星期五 七月 20, 2012 4:54 pm 文章主題: |
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for durable and simple pressurestat replacement 100,000 tested :
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