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- since 1996 -

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Technical Discussions
Darlene Johnston
Darlene Johnston
00:40 Apr-30-2004
Re: Calibration of TAM Panel
----------- Start Original Message -----------
: Hi, l am from Singapore Airline NDT section. Want to ask how do we calibrate the TAM Panel for FPI ? I know one way is to send back to manufactuer. Other than that any other method we could do on our own?
: Thanks
------------ End Original Message ------------

1st problem - does your company allow for in-house calibrations or do you follow the NDT standards - if so, you will have to follow their guidelines. Just to let you know, if you clean your panel (using acetone in an ultrasonic cleaner for approx 2 hrs) you get a VERY clean panel.



 
 Reply 
 
BILL KIESEL
NDT Inspector, level III L.P.I., X-RAY & U.T.
Smiths Tubular Systems-Laconia, USA, Joined Aug 2002, 4

BILL KIESEL

NDT Inspector, level III L.P.I., X-RAY & U.T.
Smiths Tubular Systems-Laconia,
USA,
Joined Aug 2002
4
02:43 Apr-30-2004
Re: Calibration of TAM Panel
----------- Start Original Message -----------
: : Hi, l am from Singapore Airline NDT section. Want to ask how do we calibrate the TAM Panel for FPI ? I know one way is to send back to manufactuer. Other than that any other method we could do on our own?
: : Thanks
: 1st problem - does your company allow for in-house calibrations or do you follow the NDT standards - if so, you will have to follow their guidelines. Just to let you know, if you clean your panel (using acetone in an ultrasonic cleaner for approx 2 hrs) you get a VERY clean panel.
------------ End Original Message ------------

Most common method for performing TAM panel calibrations require recording the results obtained when the panel is new using new (unused) test materials. Once the size of each indication is recorded the panel can be put into a recall system and the same results must be obtained each time the panel is recalled for calibration. It is important to use the same materials and the same processing parameters. A decrease in indication size will indicate the panel needs cleaning and a increase in size will indicate panel degradation.


 
 Reply 
 
Dave Davies
Dave Davies
06:22 May-03-2004
Re: Calibration of TAM Panel
----------- Start Original Message -----------
: : Hi, l am from Singapore Airline NDT section. Want to ask how do we calibrate the TAM Panel for FPI ? I know one way is to send back to manufactuer. Other than that any other method we could do on our own?
: : Thanks
: 1st problem - does your company allow for in-house calibrations or do you follow the NDT standards - if so, you will have to follow their guidelines. Just to let you know, if you clean your panel (using acetone in an ultrasonic cleaner for approx 2 hrs) you get a VERY clean panel.
------------ End Original Message ------------

What do you mean by "calibration"? The TAM panel, to the best of my knowledge, is a comparative item used to check deterioration of chemicals or other problems in the system on an ongoing basis.

By photographing the new panel with a known good process / consumables a baseline is established against which you can see any deterioration. (You should have two photographs, keeping one for on line display/use and keeping one in a light proof storage as a backup).

Whether deterioration comes from problems with the panel or process is what you have to determine. You should be keeping unused samples of consumables so if you suspect TAM panel problems process it with the saved materials and check against your initial photo.

"Calibration" is thus done by yourself on your system and would not be valid for any other system. Keeping the TAM panel immersed in a solvent between uses and regular vapour / ultrasonic cleaning should slow down the build up of penetrant residue in the cracks on the panel.

You need to write your own procedure for this, suppliers when they "calibrate" panels process with unused materials and check against file photo's, there should be no reason why you can't do the same (provided your regulators and customers agree of course).

Dave Davies


 
 Reply 
 
Dave
Dave
02:09 May-04-2004
Re: Calibration of TAM Panel
----------- Start Original Message -----------
: : : Hi, l am from Singapore Airline NDT section. Want to ask how do we calibrate the TAM Panel for FPI ? I know one way is to send back to manufactuer. Other than that any other method we could do on our own?
: : : Thanks
: : 1st problem - does your company allow for in-house calibrations or do you follow the NDT standards - if so, you will have to follow their guidelines. Just to let you know, if you clean your panel (using acetone in an ultrasonic cleaner for approx 2 hrs) you get a VERY clean panel.
: Most common method for performing TAM panel calibrations require recording the results obtained when the panel is new using new (unused) test materials. Once the size of each indication is recorded the panel can be put into a recall system and the same results must be obtained each time the panel is recalled for calibration. It is important to use the same materials and the same processing parameters. A decrease in indication size will indicate the panel needs cleaning and a increase in size will indicate panel degradation.
------------ End Original Message ------------


What do you mean by "calibration"? The TAM panel. to the best of my knowledge,is a comparative item used to check deterioration of chemicals or other problems in the system on an ongoing basis.

By photographing the new panel with a known good process / consumables a baseline is established against which you can see any deterioration. (You should have two photographs, keeping one for on line display/use and keeping one in a light proof storage as a backup).

Whether this comes from problems with the panel or process is what you have to determine. You should be keeping unused samples of consumables so if you suspect TAM panel problems process it with the saved materials and check against your initial photo.

"Calibration" is thus done by yourself on your system and would not be valid for any other system. Keeping the TAM panel immersed in a solvent between uses and regularvapour / ultrasonic cleaning should slow down the build up of penetrant residue in the cracks on the panel.

You need to write your own procedure for this, suppliers when they "calibrate" panels just process with unused materials and check against file photo's, there should be no reason why you can't do the same (provided your regulators and customers agree of course).





 
 Reply 
 

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