Dave's esoteric lab equipment.....

[george graves]

Dave - I noticed in your lab, you have some really specialized gear.  Not something that the average bloke would have.  Micro current, and micro volt stuff.  What do you need it for?  Why did you buy it?  In what situation do you reach for it?  How do you keep it calibrated?

I find it really  interesting watching your videos, that you'll naturally go for a "kit" power supply  and not something newer.  It's not something you talked about - other than outside of the whole "confidence" of measurement and test gear.

Would love to know more.  I think you know the question I'm asking....but I honestly only know enough to ask why!

[EEVblog]

Dave - I noticed in your lab, you have some really specialized gear.  Not something that the average bloke would have.  Micro current, and micro volt stuff.  What do you need it for? 

Yes, I've got 4 Keithley units that allow me to generate anything from nV to 1000V in any step you like, and fA to A in any step you like.

Why did you buy it? 

Because I thought they were cool. And once you get one, you have to get the complete set 
Some people like people like high voltage/high power gear, I like low voltage/low power gear.

In what situation do you reach for it?

Hardly any, I just like to fiddle 
The 225 current source is useful sometimes because it can generate "real world" useful constant currents up to 100mA.

How do you keep it calibrated?

Cross checking with other gear and standards. I don't pay to get them formally calibrated.
e.g. it's not hard to check a constant current source if you have a simple resistance standard and precision multimeters.

Dave.