Teachable Moment Pop-Quiz #1

[Outta Control]

What is going on with Outta Control's Aerial Vue vehicle.

Explain your onservations.

 

[ArrUnTuS]

It's raining and that's why some areas are colder than others, the water jets?

 

[Outta Control]

Not bad. So why the 65 reading?

 

[ArrUnTuS]

The vehicle has stopped after running and is cooling down. Is the reading from the engine vent? Or from the inside?

 

[Outta Control]

Ugh you are so close. Need to remember some of my past post that will give you a hint.

 

[ArrUnTuS]

Do we need an FFC?

 

[Outta Control]

Just like #2 it is about reflection.

 

[TreeLineView]

Are you taking that reading off the wiper blade which should have a high emissivity reading or is the defroster ON?

 

[Outta Control]

Yeah the spot meter is pointed to the wiper but which does have a high emissivity but I was more directing to the over FoV and no the defroster is not on nor is the Aerial Vue truck running.

Here is the RGB shot from my C2.

Remember that water hold heat more? And some are reflections. If you look at the wipers and can barely see the drivers mirrors they are absorbing and reflecting the sunlight.

Does this makes sense?

 

[ArrUnTuS]

I don't know why I have it in my head that they take pictures at night. Same because the difference in temperature makes it easier to see the details. My follies.

Reflections of the water, understood (we'll see )

Thanks

 

[Outta Control]

Remember water has the ability to reflect and can hold heat longer.

 

[LUIS MARTINEZ]

The first, obvious problem is the ~next to 45.7 which any thermographer using FLIR brand knows means the detector is still warming up and no readings should be attempted. FLIR 101...

 

[Outta Control]

Good technical observation, but the camera has been on for over 10 minutes prior to the shot taken so the sensor is already warm.

 

[LUIS MARTINEZ]

Level 1 thermography course warning-don't assume one knows more than the FLIR- the warning symbols are there for a reason.

 

[Outta Control]

I never claim to know more that FLIR. As I stated it has been on for over 10 minutes because I was walking around finding interesting subject matter. Plus this exercise is more about qualitative results.

 

[LUIS MARTINEZ]

The 10 minutes are irrelevant. FLIR instructions are clear, so was my Level 1 instructor; don't attempt reading until detector says is ready.
I understand your "exercise" parameters, However, if we are going to guide others we should fully disclose correct settings and conditions, OC. That's all.

 

[Outta Control]

Not sure what you are getting at and this challenging tone comes from. You may have more experience that I do but certainly "sense a disturbance in the Force".

I was not giving or noting Absolute temp but more just an Apparent temperature. Besides this is a Qualitative exercise.

I guess I should put a footnote or disclaimer, per your instruction, in all these exercises.

BTW: This where I got my information when the sensor is NUC'd aka sensor is warmed up.

 

[LUIS MARTINEZ]

Not sure what you are getting at and this challenging tone comes from. You may have more experience that I do but certainly "sense a disturbance in the Force".

There's no agenda, other than if we are going to teach (posting an ITC logo),and post an image as a "quiz," we should use a good image and/or explain the indicators rather than assume the rest of the folks playing along knows what they mean. Any conclusions based on your image are suspect, detector is not up to specs yet, and the camera is trying to tell you that ~.

I was not giving or noting Absolute temp but more just an Apparent temperature. Besides this is a Qualitative exercise.

Your "students" don't know that.

I guess I should put a footnote or disclaimer, per your instruction, in all these exercises.

If you are going to assume the mantle of teacher...yes, you should.

BTW: This where I got my information when the sensor is NUC'd aka sensor is warmed up.

NUC occurs regularly. A ~ indication means not ready/don't make measurements.
ITC instructor was very clear about this. I'm only level 1, not qualified to teach.

Just constructive criticism, provide all necessary info, not everyone here is a trained thermographer and they are entitled to accurate info.

 

[Outta Control]

PM your way

 

[LUIS MARTINEZ]

PM back at ya...