I first found this 2-06 How bad is the servity and will it fell? It has stayed about the same for a year.

Pre_Press_Feed_(3-20-07).pdf (149 Kb, 145 downloads)

There appear to be two different problems on your report.. which are you referring to? One is on "A" phase the other on "C" phase.

I guess the question is.. why hasn't it been repaired yet?

Hi Gary,

I think this is an old story now, but i just happen to read this post..

In your report the Feed To#3 had a temperature rise of 47.3º,but the category is just "moderate" and the repair should be in 2-4 weeks..And for the Feed To#2 the rise is 18.3º and the category is just "moderate" and the repair should be in 1-4 weeks .

Normally we would put a temperature rise of 40º in "Critical" category!! Can tell me what happen to these breakers? Did they change it?

Have a nice time!!

Jenish,

Your response brings up a good point. You want to have this fixed within 2-4 weeks, the problem was discovered 1 year ago and has remained the same since with no failure. I have these same issues with my vibration customers and was hoping that IR was a more cut and dried. How do others write up their repair recommendations?

normally the priorities are as belows , those we are using.
Temp Priority

0 deg : 5- normal
1 to 7 deg c: 4- Minor
8 to 15 deg c : 3- Important
16 to 32 deg c : 2- serious
33 & above : 1- critical

thanks & regards

I have a few thoughts I'd like to ask the IR report people in the forum.

Do the IR people here think that keeping the same scale across images on the report, where feasible, is a good idea? Or, would it be a good idea to at least acknowledging that the scale has changed because the temperature ranges have changed?

Images can be visually deceptive to the reader. When the reader notices the scales are different, they might give less credence to the report as a whole when they figure that out. The images on the first post look very similar visually, but are over 30 degrees different.

Also, if the problem existed a year without further problems, the time scales associated with the crit factors might be seen as alarmist when persons in charge test the recommendations. Leaving the problem could be seen as a test of the recommendations.

Could possible failure modes assocated with the hot spots be better than quoting warning dates that might not come true?

Thanks,
J-

Good points. We all know here that failure cannot be predicted and at the same time we try to quantify the degree of urgency. I'm with you that we should avoid mentioning time frames. For one thing, there will be a multitude of other factors that will control the scheduling beyond our recommendation (plant conditions and resources). So it would be good to add comments about the severity without dates. In developing a plan, you might suggest that the problem needs to be monitored monthly until corrected. (actually when monitoring findings on critical equipment pending repair, we tend to watch it frequently at first and then less frequently as we see it appears stable).

As far as temperature scales, I wouldn't restrict the temperature scales since that limits your ability to use the full range of color scale available to you on a given condition. I guess you could add a note mentioning that scales changed, but my personal preference would be not to. If someone notices the change in scale and the effect the scale has on the image, they are learning one of the subtleties of interpreting images (i.e. don't just look for red). It is not our job to teach them how to read images on each report, and it would contribute to the clutter if we tried to. Just my opinion... I guess the most effective technique will certainly depend on the audience.

Hi guys,

I agree with Pete.. If we give different temperature scales in our report people will automatically learn to compare the severity of thermal images based on the scales and not on the colors. But still, putting same scale for different images in the same report will be more appealing for anyone who read your reports.. We can't think that all people are ready to learn!! ha ha ha...

Have a nice day and Happy New Year in Advance!!