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 -
3803 views
Career Discussions
Rafid O. Lopez
, NDT Level 3
Mexico, Joined Jan 2010, 82

Rafid O. Lopez

, NDT Level 3
Mexico,
Joined Jan 2010
82
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, 82

Rafid O. Lopez

, NDT Level 3
Mexico,
Joined Jan 2010
82
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

YXLON Cougar EVO

Scalable small footprint X-ray inspection systems for assembly and laboratory applications. The
...
YXLON Cougar EVO series was designed to provide the "best-in- class" inspection solutions for SMT, semiconductor, and laboratory assembly applications, while maintaining a small system footprint for maximum convenience. With optimized software and hardware, these systems produce higher quality and more consistent results than other electronics inspection systems currently on the market.
>

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
>

Research Center IDEKO develops an ultrasonic train wheel inspection system for CAF

The Basque Research centre IK4-IDEKO has developed a state-of-the-art ultrasonic inspection system f
...
or the train wheel. This system secures a sound condition of train wheels and is thus a significant contribution to rail transport safety. The device was delivered to CAF recently and its use allows the manufacturer to become an approved supplier of rolling stock in Italy, as it meets the demanding homologation standards of this country. \\\\r\\\\n
>

Compact NDT inspection-heads for measurements with active thermography

The compact inspection head is suitable for thermographic ndt tasks. The uncooled infrared camera
...
is specially developed for NDI-tasks and offers a thermal sensitivity until now known only from thermal imagers with cooled detector. All required components and functions are integrated into the inspection-head. You will only need an ethernet cable to connect the sensor with the evaluation system.
>

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