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John Bryan[_2_] John Bryan[_2_] is offline
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Default 30V, 5-10A bench PSU recommendations?

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T i m wrote:

On Wed, 16 Sep 2020 23:50:17 +0100, John Bryan
wrote:


snip


So if you set it on the units field you could wind it down from say 12
to 5 volts just by turning the knob (eg, it wouldn't just go from 12
to 10 and up to 19 and back down etc)?


The display would go from the initial 12, 11, 10, 9, 8, 7, 6, then 5.
Conversely going up 12, 13, 14,.....up to 30.


Understood, thanks (once out of 'setting' mode?)


If that was the case and based on the fact that most people would set
the volts in 'whole unit' increments, that would make it much more
useable IMHO).


Similar thing could happen with the current limit in that you could
have it on the .1 range and still have reasonable speed and
granularity?


Yes and obviously on the 1 amp setting you only have five steps and on the
100mA setting 50steps.


Check.

Do you have to leave it to 'time out' on the individual digit for the
above to happen (eg, to stop it just cycling round that field or does
it never do that)?



Yes you have to leave it to time out but it is only for 4-5 seconds.


Check.

The output display when setting mode increments/decrements the whole of
the voltage or current display.


Is there any prior indication on what field you will be on when you
press the encoder again John or is it 'suck it and see' (press it and
see what flashes)?


No.
I have just tested that and from power on the most significant field
flashes in either voltage or current setting mode. The least significant
field is only four quick pushes away.

If you miss it, just keep pressing as the display cycles through most to
least field and then back again least to most field, which seems a bit
wierd to me!

I have never given this a thought as it seemed to be intuitive to just
repeatedly press the control to get to the one needed.


So in your example when in the 100mV field, turning the control
anti-clockwise the display would show 11.90, then 11.80 and so on down to
5.10 then 5.00.


Check.


Left for 5 seconds the display stops flashing and the output is now set at
5.00 volts.


Ah, so, what happens to the output voltage between selections? Does it
stay at the last setting, follow the changes or disconnect till the
new voltage is selected etc?

The display does not cycle round.


Noted (and that might be just as well, depending on the output status
during changes etc).


When at the minimum or maximum is gives a bleep as a warning.


Ok.


The control can still be turned being but an encoder does not change the
output.


Understood.


Cheers, T i m



--
John Bryan