http://forum.theriac.org/ This is a Reliability discussion forum maintained by http://www.theRIAC.org en Thu, 20 Jun 2013 05:36:07 GMT vBulletin 60 http://www.theriac.org/forum/images/misc/rss.jpg http://forum.theriac.org/ http://forum.theriac.org/showthread.php?t=14711&goto=newpost Wed, 19 Jun 2013 09:07:17 GMT Hello, I have a problem with determining temperature to my prediction analysis with 217plus method. This method requires 3 kinds of temperature:... Hello,
I have a problem with determining temperature to my prediction analysis with 217plus method.
This method requires 3 kinds of temperature: TAO (ambient –operation), TAE (ambient non-operation), TR (juncion temperature). We would like use thermovision camera and read these temperatures from thermograph but how to do this?

TAE – we can read this temperature when the power is off (then this temperature is the same everywhere)
TR- temperature rise above the ambient operating temperature (the junction temperature is, therefore, TAO+TR)
But what is TAO? Where does it measure? Is TAO next to the component (lets say 1cm)? Here is a helpful picture
http://i.cmpnet.com/powermanagementd...13-Figure1.gif
Regards ]]> General mamarzec http://forum.theriac.org/showthread.php?t=14711 http://forum.theriac.org/showthread.php?t=14710&goto=newpost Mon, 17 Jun 2013 10:17:23 GMT Hello, I am a new user of the 217Plus norm. During the categorization process I have experienced some problems concerning a few parts. To which... Hello,
I am a new user of the 217Plus norm. During the categorization process I have experienced some problems concerning a few parts. To which category can I add the following parts:

- DIODE TRANSIL (http://www.tme.eu/pl/details/p6smb6....wukierunkowe/#)
Diode, Low Frequency, Array / Diode, Low Frequency, Transient Suppressor?

- ESD PROTECTION DIODE (http://uk.farnell.com/texas-instrume...22?Ntt=1603422)
Diode, Low Frequency, Array?

-IC, ADC CONVERTER (http://pl.farnell.com/analog-devices...sop/dp/1607231)
Is it IC, Digital, Plastic or IC, Linear, Plastic?

Furthermore, I have troubles with categorization of the components:

1. Jumper: JUMPER-2.0/B -TME http://www.tme.eu/pl/details/jumper-...lkowe/ninigi/#
Connector, Rectangular ?

2. Battery holder for battery CR2032: SN2032SN-LF – Martiex http://www.maritex.com.pl/en/shop/se...nd=SN2032SN-LF

3. Suppression Filter: NFE61PT472C1H9L - Fernell http://uk.farnell.com/murata/nfe61pt...nal/dp/9528229


4. FUSES SMD: BSMD-T1.0A – TME http://www.tme.eu/pl/details/bsmd-t1...siba/1580001/#

5. Quartz crystal SMD: QSD12M000 - Maritex http://www.maritex.com.pl/en/shop/products/ggid/291


6. Quartz Crystal SMD with Capacitor: 12.00M-12SMXR – TME http://www.tme.eu/pl/details/12.00m-...f-xtal026384/#

I am a little bit experienced with the method MIL-HDBK-217F which includes both components of Quartz crystal type and Fuses. Can I use data from MIL-217F while performing calculations of lambda_IA using method 217Plus for fuses and quartz crystals? If yes, how should I do this? For instance FUSES MIL-217F present the following model:

Lambda=base_failure_rate*environmental_factor*qual ity_factor

The problem is that 217Plus does not include a quality factor and on the level of Lambda_IA this method does not take into account an environmental factor. How can I cope with that?
I do not use any software (just the norm).
Regards, ]]> Electrical Component Reliability mamarzec http://forum.theriac.org/showthread.php?t=14710 http://forum.theriac.org/showthread.php?t=14709&goto=newpost Mon, 17 Jun 2013 08:56:49 GMT Hello, I am a new user of the 217Plus norm. During the categorization process I have experienced some problems concerning a few parts. To which... Hello,
I am a new user of the 217Plus norm. During the categorization process I have experienced some problems concerning a few parts. To which category can I add the following parts:

- DIODE TRANSIL (http://www.tme.eu/pl/details/p6smb6....wukierunkowe/#)
Diode, Low Frequency, Array / Diode, Low Frequency, Transient Suppressor?

- ESD PROTECTION DIODE (http://uk.farnell.com/texas-instrume...22?Ntt=1603422)
Diode, Low Frequency, Array?

-IC, ADC CONVERTER (http://pl.farnell.com/analog-devices...sop/dp/1607231)
Is it IC, Digital, Plastic or IC, Linear, Plastic?

Furthermore, I have troubles with categorization of the components:

1. Jumper: JUMPER-2.0/B -TME http://www.tme.eu/pl/details/jumper-...lkowe/ninigi/#
Connector, Rectangular ?

2. Battery holder for battery CR2032: SN2032SN-LF – Martiex http://www.maritex.com.pl/en/shop/se...nd=SN2032SN-LF

3. Suppression Filter: NFE61PT472C1H9L - Fernell http://uk.farnell.com/murata/nfe61pt...nal/dp/9528229


4. FUSES SMD: BSMD-T1.0A – TME http://www.tme.eu/pl/details/bsmd-t1...siba/1580001/#

5. Quartz crystal SMD: QSD12M000 - Maritex http://www.maritex.com.pl/en/shop/products/ggid/291


6. Quartz Crystal SMD with Capacitor: 12.00M-12SMXR – TME http://www.tme.eu/pl/details/12.00m-...f-xtal026384/#

I am a little bit experienced with the method MIL-HDBK-217F which includes both components of Quartz crystal type and Fuses. Can I use data from MIL-217F while performing calculations of lambda_IA using method 217Plus for fuses and quartz crystals? If yes, how should I do this? For instance FUSES MIL-217F present the following model:

Lambda=base_failure_rate*environmental_factor*qual ity_factor

The problem is that 217Plus does not include a quality factor and on the level of Lambda_IA this method does not take into account an environmental factor. How can I cope with that?
I do not use any software (just the norm).
Regards, ]]> 217Plus mamarzec http://forum.theriac.org/showthread.php?t=14709 http://forum.theriac.org/showthread.php?t=14708&goto=newpost Fri, 07 Jun 2013 14:49:12 GMT Hello! I use the 217plus method to calculate the failure rate of our system. When initial assessment of failure rate was calculated we would like to... Hello!
I use the 217plus method to calculate the failure rate of our system. When initial assessment of failure rate was calculated we would like to go one level up and use system level model. According to norm, System Model Process Grade Factor (PGF) multiplier is equal to 1.0 (default). The one factor I would like to use in the model is the environmental factor (system is exposed to strong vibrations). The rest of the factors could be set at their default values. What is the default value of the environmental factor? If I had such information I would be able to adapt the equation (Factor_P*Factor_IM*factor_E+……+factor_W = 1) for my needs . I do not use any software (just the norm).
Could you also tell me where I can find in the above norm a electrolytic capacitor and standard SMD resistor (what is it made of? metal?).

With regards, ]]> 217Plus mamarzec http://forum.theriac.org/showthread.php?t=14708 http://forum.theriac.org/showthread.php?t=14707&goto=newpost Thu, 23 May 2013 14:16:31 GMT could someone tell me just what a rel.audit control plan should entail? could someone tell me just what a rel.audit control plan should entail? ]]> Electrical Component Reliability ejschuss http://forum.theriac.org/showthread.php?t=14707