Since I don't yet have a "wet" environment I
unpacked and set up my power supply.
Like this one
:
http://www.ebay.com/itm/Precision-Variable-Adjustable-30V-5A-DC-Power-Supply-Digital-Regulated-Lab-Grade-/150910739194?pt=LH_DefaultDomain_0&hash=item2322fb22fa
(gee .. there's one like it for 50c
cheaper! That particular one's an auction -- but
Buy-it-now is the same price $67-ish, free shipping).
The manual is ... Chinese and Chinglish :
1. Current
2. Steady flow rough tuning
3. Steady flow fine tuning
4. Steady flow state
5. Shows the three voltage
6. Fine-tuning regulators
7. Rough-tuning regulators
8. Directed state regulators
9. Negative output terminal
10. Positive output terminal
11. Output grounding terminal
12. Current switch
13. A/mA range conversion
Pretty straight forward : a course and fine
voltage and current control, and a switch between mA and A
Whichever is higher takes control (Constant
Current, Constant Voltage) with an indicator light
I had a little potentiometer handy, so I set it to mA and gave it a twist.
Ooops !!! I misinterpreted the mA vs A switch : what's that burning smell !!??
Hooked up my 1 ohm / 25W resistor .... makes a
nice hand-warmer if you set the VA right.
I see that brand-new Chinese Variacs are available for a similar price.
