Yes I see it, ‘open circuit voltage’.

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> On Feb 20, 2020, at 7:37 PM, Paul Andrews <[email protected]> wrote:
> 
> A whole bunch of IN-28s. The current won’t be constant, and I don’t want the 
> voltage to fluctuate, so time for plan B it seems. Whatever that might be.
> 
> Thanks for the insight, is that on that datasheet somewhere?
> 
>>> On Feb 20, 2020, at 6:48 PM, gregebert <[email protected]> wrote:
>>> 
>> 
>> Essentially, yes. But be aware of the open-circuit output voltage; the 
>> supply will attempt to pump-out the amount of requested current, and in 
>> order to do so, it will increase it's output voltage until the desired 
>> current is obtained.
>> Just make sure that *you* are not the load. For example, if you set the 
>> current to 150mA, and touch the terminals, you will probably be killed. I'm 
>> not joking. The 1400mA supply will crank out as much as 420V, and 100-200mA 
>> is fatal.
>> 
>> I suspect that when the supply is energized, it will rapidly increase the 
>> output voltage from 0 volts, up to the maximum no-load output voltage 
>> (420V), until the measured current reaches what you set it to. If the load's 
>> resistance decreases as the current increases, the output voltage will also 
>> decrease; this is typical behavior of a gas discharge as it ionizes.
>> 
>> What are you driving from the supply ?
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