Hi all.
In a weak moment when browsing through DBA (a Danish eBay equivalent) I saw a listing for the B&K precision 9206 PSU. I sent him an offer and i he agreed.
The day after and 2500Dkr poorer (ca 350$) I picked it up.
Did I really need this supply? Yes absolutely
Until now, I've used one of those DPS5005 PSU modules and three lab-top power bricks in series and mounted in a box. This setup is working but the leakage voltage to chassis is much higher than I'm comfortable with.
I haven't seen any review
s on the 9206 so I'll post some pics and my initial thoughts of it for the next person interested.
My unit is like new. I even had the honour of pealing the screen protector off
The key specs:
Output Rating
Voltage 0-150 V
Current 0-10 A
Power 600 W
Line Regulation
Voltage ≤ 0.01%+15 mV
Current ≤ 0.05%+10 mA
Load Regulation
Voltage ≤ 0.01%+15 mV
Current ≤ 0.05%+10 mA
Ripple and Noise (20 Hz - 20 MHz)
Voltage ≤ 50 mVpp
Current ≤ 15 mArms
Programming Resolution
Voltage 1 mV
Current 0.1 mA
Readback Resolution
Voltage 1 mV
Current 0.1 mA
Programming Accuracy ± (%output+offset)
Voltage ≤ 0.03%+20 mV
Current ≤ 0.1%+25 mA
Readback Accuracy ± (%output+offset)
Voltage ≤ 0.03%+20 mV
Current ≤ 0.1%+25 mA
This thing is seriously heavy. 15kg. And I had it with me through the Copenhagen metro to get home.
It's big too. 8.45” x 3.47” x 17.52” (214.5 x 88.2 x 445 mm).
Having a keypad on a PSU with this high voltage, current and the programming resolution, it’s nice to have the keypad. All in all, I think the user interface is good. Maybe I would have liked it more if it automatically switched from set voltage and current to the measured values when enabling the output.
I have had the need for a programmable PSU before, now I have one.
It has both USB, RS-232 and GPIB interface on the rear panel.
This is where the voltage sense terminals are too. Furthermore, there is a DVM input. Why this is only 0 - 60V on a 150V PSU is beyond me… I won’t use it anyway.
Remember the 15kg? Why all the weight you ask?? This is a switching supply after all!
It sure is, but they opted to using a GIGANTIC toroidal transformer before the switcher.
One thing that does not impress me much, is the layout. It’s a bit cunfusing with all the wires crossing everywhere.
I shouldn’t complain though. I can’t do it better myself.
The huge output capacitance and the mounting of the caps is the same construction as on my HP E3631A. Right on the output banana jacks. It’s even floating in free air like on the HP.
I think the former owner might have changed the rear fan. The wire was soldered and heat srunk and the fan is only mounted with two bolts. Maybe it always have been…
It was easy to take apart and put together. Now it has found it’s resting place omong new friends.
If you have any questions or want me to take some measurements, just ask.