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Is there any equipment to measure dv/dt of capacitor?
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Rich Grise
electronics forum Guru


Joined: 24 Mar 2005
Posts: 3971

PostPosted: Wed Jul 12, 2006 12:03 am    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

On Sat, 08 Jul 2006 17:09:36 -0700, GSiu wrote:

Quote:
Is there any equipment to measure dv/dt of capacitor?

Isn't that just capacitance? I thought I remembered something like

C = I * dv/dt or something.

Good Luck!
Rich
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Michael A. Terrell
electronics forum Guru


Joined: 24 Mar 2005
Posts: 2291

PostPosted: Mon Jul 10, 2006 4:04 am    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

John Fields wrote:
Quote:

On Sun, 09 Jul 2006 13:27:15 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

I just remembered the test procedure... the dv/dt rating has been
exceeded when the case bulges ;-)

---
Wow!!!

From your "Opti-Visor Monster" post on abse it looks like your dv/dt
rating has been exceeded big-time! Wink


Looks like he's ignoring the "Best if used by date: " too. ;-)


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
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Jeff L
electronics forum beginner


Joined: 04 Sep 2005
Posts: 47

PostPosted: Mon Jul 10, 2006 2:21 am    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote in
message news:pip2b29i10iutkrl5gt81nnbv2d4fp3vb6@4ax.com...
Quote:
On Sun, 09 Jul 2006 19:59:04 GMT, "Genome" <mrspamizgood@yahoo.co.uk
wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote in
message news:mjk2b21q5nffpob4njn4o9t43f94lb7pva@4ax.com...


Some capacitors may well have a specification for MAXIMUM RATED dv/dt
before dielectric failure; but the OP didn't ask that... unless, of
course, he has no clue ;-)

...Jim Thompson

You're just trying to make excuses for going BwaaaHaaHaaHaa.....

DNA


I just remembered the test procedure... the dv/dt rating has been
exceeded when the case bulges Wink


And here I thought it was when the lead wires vaporized ;-)

Quote:

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
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Genome
electronics forum Guru


Joined: 30 Apr 2005
Posts: 789

PostPosted: Sun Jul 09, 2006 10:18 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:4hc7t1F1r3e0pU1@individual.net...
Quote:

BTW:

Psychotic piles of sub human garbage like "Genome" can go f*** a dead
donkey.

...... Phil

Oooooo, That might be a new experience.

Can I borrow yours when you're finished with it?

DNA
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Genome
electronics forum Guru


Joined: 30 Apr 2005
Posts: 789

PostPosted: Sun Jul 09, 2006 10:15 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

"ian field" <dai.ode@ntlworld.com> wrote in message
news:vFesg.93997$uP.7299@newsfe2-gui.ntli.net...
Quote:

"Genome" <mrspamizgood@yahoo.co.uk> wrote in message
news:Tzesg.23484$v4.23180@newsfe3-win.ntli.net...

"ian field" <dai.ode@ntlworld.com> wrote in message
news:73esg.78791$lQ.52136@newsfe3-gui.ntli.net...


Imagine going through all that discomfort just to get the bus to
yourself! Personally I find it much less effort to let a really putrid
decomposing flesh fart, and then sit there and watch as all the other
passengers jam the door trying to pile out at the next stop.


Hey, you haven't smelled me so you're not worth an opinion.

DNA


No doubt you'd make a skunk's eyes water!


I wouldn't want to get recursive about this but....

Hey, you haven't smelled me so you're not worth an opinion.

DNA
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I.F.
electronics forum Guru


Joined: 30 Mar 2006
Posts: 407

PostPosted: Sun Jul 09, 2006 9:36 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

"Genome" <mrspamizgood@yahoo.co.uk> wrote in message
news:Tzesg.23484$v4.23180@newsfe3-win.ntli.net...
Quote:

"ian field" <dai.ode@ntlworld.com> wrote in message
news:73esg.78791$lQ.52136@newsfe3-gui.ntli.net...


Imagine going through all that discomfort just to get the bus to
yourself! Personally I find it much less effort to let a really putrid
decomposing flesh fart, and then sit there and watch as all the other
passengers jam the door trying to pile out at the next stop.


Hey, you haven't smelled me so you're not worth an opinion.

DNA


No doubt you'd make a skunk's eyes water!
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Genome
electronics forum Guru


Joined: 30 Apr 2005
Posts: 789

PostPosted: Sun Jul 09, 2006 9:31 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

"ian field" <dai.ode@ntlworld.com> wrote in message
news:K_dsg.78790$lQ.51366@newsfe3-gui.ntli.net...
Quote:

"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote in
message news:pip2b29i10iutkrl5gt81nnbv2d4fp3vb6@4ax.com...

I just remembered the test procedure... the dv/dt rating has been
exceeded when the case bulges ;-)

...Jim Thompson

As it often does on PC monitor flyback tuning caps - especially the square
cased blue Philips ones!


No, surely not.

Oh, that must have been some rip off design not specified by Philips where
someone tried to save pennies and didn't read the data sheet.....

Are you saying BC components have stuffed up the QC under orders from
Vishay?

DNA
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Genome
electronics forum Guru


Joined: 30 Apr 2005
Posts: 789

PostPosted: Sun Jul 09, 2006 9:30 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

"ian field" <dai.ode@ntlworld.com> wrote in message
news:73esg.78791$lQ.52136@newsfe3-gui.ntli.net...
Quote:


Imagine going through all that discomfort just to get the bus to yourself!
Personally I find it much less effort to let a really putrid decomposing
flesh fart, and then sit there and watch as all the other passengers jam
the door trying to pile out at the next stop.


Hey, you haven't smelled me so you're not worth an opinion.

DNA
Back to top
John Fields
electronics forum Guru


Joined: 24 Mar 2005
Posts: 3260

PostPosted: Sun Jul 09, 2006 9:17 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

On Sun, 09 Jul 2006 13:27:15 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:


Quote:
I just remembered the test procedure... the dv/dt rating has been
exceeded when the case bulges Wink

---
Wow!!!

From your "Opti-Visor Monster" post on abse it looks like your dv/dt
rating has been exceeded big-time! ;)


--
John Fields
Professional Circuit Designer
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qrk
electronics forum Guru Wannabe


Joined: 07 May 2005
Posts: 167

PostPosted: Sun Jul 09, 2006 8:58 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

On 8 Jul 2006 17:09:36 -0700, "GSiu" <gomansiu@mintformer.com> wrote:

Quote:
Is there any equipment to measure dv/dt of capacitor?

This is a torture test where the outcome can be determined using a
capacitance meter. As you vaporize the metalization during the torture
test, you can measure the decrease in capacitance. I once saw
production substitute a wimpy poly cap for the pulse rated cap they
were supposed to use in a pulse power amplifier tuning network. After
a day of operation, the caps would open. That was fun.

---
Mark
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I.F.
electronics forum Guru


Joined: 30 Mar 2006
Posts: 407

PostPosted: Sun Jul 09, 2006 8:55 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

"Genome" <mrspamizgood@yahoo.co.uk> wrote in message
news:tbdsg.78782$lQ.54444@newsfe3-gui.ntli.net...
Quote:

"ian field" <dai.ode@ntlworld.com> wrote in message
news:fXbsg.93722$uP.89480@newsfe2-gui.ntli.net...


How's Genome's not washing marathon going? - maybe the dead donkey smells
better!

Got a bit sweaty during the hot weather type stuff and had to resort to
Canestan to clear up the red halo around my arsehole.

There are a few crotch pores building up plugs but nothing worth
harvesting for a chew yet.

DNA


Imagine going through all that discomfort just to get the bus to yourself!
Personally I find it much less effort to let a really putrid decomposing
flesh fart, and then sit there and watch as all the other passengers jam the
door trying to pile out at the next stop.
Back to top
I.F.
electronics forum Guru


Joined: 30 Mar 2006
Posts: 407

PostPosted: Sun Jul 09, 2006 8:50 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote in
message news:pip2b29i10iutkrl5gt81nnbv2d4fp3vb6@4ax.com...
Quote:
On Sun, 09 Jul 2006 19:59:04 GMT, "Genome" <mrspamizgood@yahoo.co.uk
wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote in
message news:mjk2b21q5nffpob4njn4o9t43f94lb7pva@4ax.com...


Some capacitors may well have a specification for MAXIMUM RATED dv/dt
before dielectric failure; but the OP didn't ask that... unless, of
course, he has no clue ;-)

...Jim Thompson

You're just trying to make excuses for going BwaaaHaaHaaHaa.....

DNA


I just remembered the test procedure... the dv/dt rating has been
exceeded when the case bulges ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

As it often does on PC monitor flyback tuning caps - especially the square
cased blue Philips ones!
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Jim Thompson
electronics forum Guru


Joined: 06 May 2005
Posts: 5440

PostPosted: Sun Jul 09, 2006 8:27 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

On Sun, 09 Jul 2006 19:59:04 GMT, "Genome" <mrspamizgood@yahoo.co.uk>
wrote:

Quote:

"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote in
message news:mjk2b21q5nffpob4njn4o9t43f94lb7pva@4ax.com...


Some capacitors may well have a specification for MAXIMUM RATED dv/dt
before dielectric failure; but the OP didn't ask that... unless, of
course, he has no clue ;-)

...Jim Thompson

You're just trying to make excuses for going BwaaaHaaHaaHaa.....

DNA


I just remembered the test procedure... the dv/dt rating has been
exceeded when the case bulges ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
Back to top
Jim Thompson
electronics forum Guru


Joined: 06 May 2005
Posts: 5440

PostPosted: Sun Jul 09, 2006 8:08 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

On Sun, 09 Jul 2006 19:59:04 GMT, "Genome" <mrspamizgood@yahoo.co.uk>
wrote:

Quote:

"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote in
message news:mjk2b21q5nffpob4njn4o9t43f94lb7pva@4ax.com...


Some capacitors may well have a specification for MAXIMUM RATED dv/dt
before dielectric failure; but the OP didn't ask that... unless, of
course, he has no clue ;-)

...Jim Thompson

You're just trying to make excuses for going BwaaaHaaHaaHaa.....

DNA


;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
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Genome
electronics forum Guru


Joined: 30 Apr 2005
Posts: 789

PostPosted: Sun Jul 09, 2006 7:59 pm    Post subject: Re: Is there any equipment to measure dv/dt of capacitor? Reply with quote

"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote in
message news:mjk2b21q5nffpob4njn4o9t43f94lb7pva@4ax.com...
Quote:


Some capacitors may well have a specification for MAXIMUM RATED dv/dt
before dielectric failure; but the OP didn't ask that... unless, of
course, he has no clue ;-)

...Jim Thompson

You're just trying to make excuses for going BwaaaHaaHaaHaa.....

DNA
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