where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

Airstar Inc.
Application of the newest technologies, such as air-coupled ultrasound, digital instrumentation, signal processing, and transducer technology.
893 views
Technical Discussions
Mathias
Mathias
01:18 May-25-2005
ASTM E 1742-00

Can anyone explain why the curve in Figure 2 (Maximum Allowable Film Density) isn’t continous? There is a jump between density 2.5 and 3.0 – why?



 
 Reply 
 
DJ Kallhof
DJ Kallhof
04:25 May-31-2005
Re: ASTM E 1742-00
I believe they are attempting to illustrate the difference between the larger "low range " viewer and the smaller "high intensity" viewer. This is just a way to document and justify the maximum readable film density posted on each viewer. What I find interesting is the fact we can no longer measure the light intensity in foot candles. According to ASTM E 1742-05 we must now measure luminance in candelas/m squared. Again, the cost of NDT goes up. Yee Ha
----------- Start Original Message -----------
: Can anyone explain why the curve in Figure 2 (Maximum Allowable Film Density) isn’t continous? There is a jump between density 2.5 and 3.0 – why?
:
------------ End Original Message ------------




 
 Reply 
 
Mathias
Mathias
05:17 Jun-01-2005
Re: ASTM E 1742-00
Thank you for the answer Mr Kallhof. But what still makes me confused is the fact that if you now measure 10000 lux at the viewing port, can you post a 3.0 sticker on the viewer or is the maximum readable density just 2.5?
----------- Start Original Message -----------
: I believe they are attempting to illustrate the difference between the larger "low range " viewer and the smaller "high intensity" viewer. This is just a way to document and justify the maximum readable film density posted on each viewer. What I find interesting is the fact we can no longer measure the light intensity in foot candles. According to ASTM E 1742-05 we must now measure luminance in candelas/m squared. Again, the cost of NDT goes up. Yee Ha
: : Can anyone explain why the curve in Figure 2 (Maximum Allowable Film Density) isn’t continous? There is a jump between density 2.5 and 3.0 – why?
: :
------------ End Original Message ------------




 
 Reply 
 
DJ Kallhof
DJ Kallhof
09:27 Jun-03-2005
Re: ASTM E 1742-00
Unfortunately I'm in the dark over this revision as much as yourself. I am waiting for a response from ASTM subcommittee E07.01 to my inquiry regarding the posting of "Maximum Allowable Film Density" and how to come up with a value.


----------- Start Original Message -----------
: Thank you for the answer Mr Kallhof. But what still makes me confused is the fact that if you now measure 10000 lux at the viewing port, can you post a 3.0 sticker on the viewer or is the maximum readable density just 2.5?
: : I believe they are attempting to illustrate the difference between the larger "low range " viewer and the smaller "high intensity" viewer. This is just a way to document and justify the maximum readable film density posted on each viewer. What I find interesting is the fact we can no longer measure the light intensity in foot candles. According to ASTM E 1742-05 we must now measure luminance in candelas/m squared. Again, the cost of NDT goes up. Yee Ha
: : : Can anyone explain why the curve in Figure 2 (Maximum Allowable Film Density) isn’t continous? There is a jump between density 2.5 and 3.0 – why?
: : :
------------ End Original Message ------------




 
 Reply 
 

Product Spotlight

Lyft™: Pulsed Eddy Current Reinvented

PEC Reinvented—CUI Programs Redefined Corrosion under insulation (CUI) is possibly the greatest u
...
nresolved asset integrity problem in the industry. Current methods for measuring wall thickness with liftoff, without removing insulation, all have severe limitations. Eddyfi introduces Lyft — a reinvented, high-performance pulsed eddy current (PEC) solution. The patent- pending system features a state-of-the-art portable instrument, real- time C-scan imaging, fast data acquisition with grid-mapping and dynamic scanning modes, and flexibility with long cables. It can also scan through thick metal and insulation, as well as aluminum, stainless steel, and galvanized steel weather jackets. Who else but Eddyfi to reinvent an eddy current technique and redefine CUI programs. Got Lyft?
>

NovaScope 6000

The all-digital Novascope 6000 is a portable, ultra-high precision thickness gauge for high-speed
...
thickness measurement. Novascope 6000 has unmatched capabilities and unique features including: •Superior Resolution with high contrast, high-speed color RF display •High pulser voltage •Real-time video output •Increased internal/external data storage •Programmable SetUp features •Battery & AC Powered
>

NEW! The PragmaPro Instrument Platform

The PragmaPro is based on a modular cartridge technology and supports various NDT instrument modal
...
ities such as UT, PAUT, ECT and many more. This new platform is based on a machined, powder-coated aluminum frame for shock-proofness, best sealing qualities and maximum heat dissipation. This is practical to extend the outdoor temperature range and/or to extend the power injected in the transducers. The PragmaPro is aiming at a very wide range of applications, such as weld scanning, corrosion mapping and composite testing.
>

Teletest Focus+

Teletest Focus+ electronics have superior capabilities than rivals on the market. Beyond the usual
...
test features, Focus+ has 24 transmit channels and 24 receive channels, with an additional on-board switching capabilities. The instrument's frequency range is 10–300 kHz.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window