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 -

AT-Automation Technology GmbH
AT -Automation Technology is a systems house for industrial image processing. AT offers thermographic ndt systems as well as high-speed 3D sensors.
3387 views
Career Discussions
Rafid O. Lopez
, NDT Level 3
Mexico, Joined Jan 2010, 79

Rafid O. Lopez

, NDT Level 3
Mexico,
Joined Jan 2010
79
21:49 Mar-11-2010
Densitometer calibration

Someone know on the difference between adjust and calibration in the densitometer? or if someone has information on this topic.

I want to do the adjust and calibration in accordance with the standard, but i do not have this standard.

I wanted to search information in the standard but, this standard change in the last revision.
Before: E 1079 Practice for Calibration of Transmission Densitometers
Now: ASTM E1709 - 09 Standard Test Method for Measurement of Retroreflective Signs Using a Portable Retroreflectometer at a 0.2 Degree Observation Angle.

Thanks all.

 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
07:16 Mar-15-2010
Re: Densitometer calibration
In Reply to Rafid O. Lopez at 21:49 Mar-11-2010 (Opening).

Hello Rafid

Adjust your densitometer after appropriate warm-up time by placing it direct on to the iluminated viewing screen and setting the reading to "0".

Then, calibration as per E 1079 2005 (latest issue according to ASTM website) is still achieved using the NIST calibrated X-ray step tablet. Use density steps closest to 0,3, 3,0 and 3,9 values. "If any of the recorded density values vary by more than +/-0,05 density units from the density values on the claibrated step tablet, the linearity of the densitometer is out of tolerance and should be corrected." Read manufacturer's instructions for how to adjust - usually a small screw altering the potentiometer settings.

All results to be recorded. In my opinion any deviation should be notified to supervisor for checking and if deviation is confirmed then to quality management.

E 1709 as you correctly wrote covers a topic totally unconnected with radiography.

 
 Reply 
 
Rafid O. Lopez
, NDT Level 3
Mexico, Joined Jan 2010, 79

Rafid O. Lopez

, NDT Level 3
Mexico,
Joined Jan 2010
79
21:21 Mar-16-2010
Re: Densitometer calibration
In Reply to Nigel Armstrong at 07:16 Mar-15-2010 .

Excellent.

This information will be very useful.

Thanks Nigel.

Best regards.

 
 Reply 
 

Product Spotlight

Wireless TOFD scanner

Quick, accurate and highly reproducible welds testing. The System operates wirelessly and is compat
...
ible with any type of Windows based Laptop, Desktop or Tablet.
>

FMC/TFM

Next generation for Phased Array UT is here now with FMC/TFM! Have higher resolution imaging, impr
...
oved signal to noise ratio, characterize, size and analyze defects better with access to several wave mode views and save raw FMC data for higher quality analysis.  Some of the benefits are:
  • Beautiful Image! Easier to understand what you're looking at
  • Completely focused in entire image or volume
  • Much easier to define setups before inspection
  • Easier to decipher geometry echoes from real defects
  • Oriented defects (e.g. cracks) are imaged better
  • See image from different wave modes from one FMC inspection
  • FMC data can be reprocessed/analyzed without going back to the field
>

CIVA 2020 UT Module

CIVA NDE Simulation Software is the world leader of NDT Simulation. The UT simulation Module incl
...
udes: - "Beam computation": Beam propagation simulation - "Inspection Simulation": Beam interaction with flaws or specimens The user can simulate a whole inspection process (pulse echo, tandem or TOFD) with a wide range of probes (conventional, Phased- arrays or EMAT), components, and flaws.
>

TESTD-PT SYSTEM

Pulse thermography is a non-contact test method that is ideal for the characterization of thin fil
...
ms and coatings or the detection of defects. With a remarquable short test time and a high detection sensitivity, the Telops TESTD-PT is the perfect tool for non- destructive testing. With such high frame rates, it is even possible to investigate highly conductive or diffusive materials.
>

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