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Test Equipment Anonymous (TEA) group therapy thread
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Zucca:

--- Quote from: TERRA Operative on July 07, 2022, 03:53:02 pm ---optimise the panel angle over the year....

--- End quote ---

It's a week I am sitting a pondering an hydraulic system to adjust the panel tilt during the day....
It will never happen on the roof.... for me.... But if I build something in the garden, wife would like some shade and tables outside... oh oh ..
AVGresponding:

--- Quote from: bd139 on July 07, 2022, 04:07:13 pm ---So sitting here cleaning test gear again.

Anyone got any ideas what might remove this horrible idiot graffiti on the panel? Isopropyl doesn’t touch it.

--- End quote ---

If those are pencil marks, solvents won't work; graphite isn't soluble in either water or organic solvents. Pencil eraser is your best bet, they work by getting the graphite to stick better to the rubber/synthetic rubber than to the writing surface.
Zoli:

--- Quote from: vk6zgo on July 07, 2022, 09:16:56 am ---
--- Quote from: Zoli on July 07, 2022, 06:06:33 am ---
--- Quote from: Vince on July 06, 2022, 05:58:52 pm ---...
As for DMM's, I don't have fancy modern ones that can test white LEDs.
...

--- End quote ---
You don't need a new and fancy DMM to test the LED's; as example, my DMM870(1998) gives 3.2v,  and the 8060A gives 8V in diode testing mode, both enough to light up any LED's.
That's why I've asked to check your multi-meters, so next time you will know which is suitable for LED testing(is part of "Know your tools" training)  >:D :-DD :-DD :-DD

--- End quote ---

That's "new & fancy" to me!
My Fluke 77 won't turn on blue LEDs, either, as they also require 3.2v.

My "bodge tester", consisting of a 9v battery, a 360 \$\Omega\$ resistor, a switch, and a small "junk" pin connector does, though!
(I dunno how I happened to have 360 \$\Omega\$ resistors & not 330 \$\Omega\$, but that's what my junk box had!)

An old ADSL box teardown yielded some nice blue LEDs with long leads, plus two bicolour ones.(red & blue, so if I ever need  a purple light, I'm in good shape!) ;D

--- End quote ---
So the Fluke 8060A is new and fancy for your Fluke 77? :-DD :-DD :-DD
Side notes:
1. I've measured my 75 seriesII diode voltage: 2.5V; the 77series I&II should be the same
2. You don't really need 3.2V to lit up the blue/white LED's; 2.8V is usually enough
AVGresponding:

--- Quote from: Zoli on July 07, 2022, 04:34:45 pm ---
--- Quote from: vk6zgo on July 07, 2022, 09:16:56 am ---
--- Quote from: Zoli on July 07, 2022, 06:06:33 am ---
--- Quote from: Vince on July 06, 2022, 05:58:52 pm ---...
As for DMM's, I don't have fancy modern ones that can test white LEDs.
...

--- End quote ---
You don't need a new and fancy DMM to test the LED's; as example, my DMM870(1998) gives 3.2v,  and the 8060A gives 8V in diode testing mode, both enough to light up any LED's.
That's why I've asked to check your multi-meters, so next time you will know which is suitable for LED testing(is part of "Know your tools" training)  >:D :-DD :-DD :-DD

--- End quote ---

That's "new & fancy" to me!
My Fluke 77 won't turn on blue LEDs, either, as they also require 3.2v.

My "bodge tester", consisting of a 9v battery, a 360 \$\Omega\$ resistor, a switch, and a small "junk" pin connector does, though!
(I dunno how I happened to have 360 \$\Omega\$ resistors & not 330 \$\Omega\$, but that's what my junk box had!)

An old ADSL box teardown yielded some nice blue LEDs with long leads, plus two bicolour ones.(red & blue, so if I ever need  a purple light, I'm in good shape!) ;D

--- End quote ---
So the Fluke 8060A is new and fancy for your Fluke 77? :-DD :-DD :-DD
Side notes:
1. I've measured my 75 seriesII diode voltage: 2.5V; the 77series I&II should be the same
2. You don't really need 3.2V to lit up the blue/white LED's; 2.8V is usually enough

--- End quote ---

Yes, but what is the maximum reading you can get?
bd139:

--- Quote from: Zucca on July 07, 2022, 04:22:51 pm ---
--- Quote from: bd139 on July 07, 2022, 04:07:13 pm ---Anyone got any ideas what might remove this horrible idiot graffiti on the panel? Isopropyl doesn’t touch it.

--- End quote ---

Pencil erase rubber?

--- End quote ---

First winner on that one. Much better now. Thank you

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