Terry,
If your power supply has current limit regulation, do as Mike recommends below. Set the voltage so
that you get about 7 amps of current, for example, then reduce the current limit setting so that it
regulates at 6 amps. The power supply will automatically reduce the voltage to limit the amount of
current to the value selected by the current adjustment. You probably have an LED that indicates
when you are in "Voltage Regulation" mode and another that indicates when you are in "Current
Regulation"mode. After doing the proper setup, above, you want to be operating in the "Current
Regulation" mode.
Dan
M. G. Devour wrote:
Wayne writes:
I would think, the higher the stream velocity, the higher your voltage
needs to be. ... I think we will be amazed at the velocity of the
stream.
Which is why it might be a good idea to build your chamber out of a
large diameter piece of pipe with reducing fittings at each end, Terry.
The larger diameter will slow the flow rate in that section without
changing the overall fill time of the tank by much, if any.
Terry writes:
I have a device that gives me 0-600 VDC, with separate dials and meters
for voltage and current. I may experiment with that to try to find an
ideal voltage/current ratio.
If that's the case, Terry, you may have the perfect piece of equipment.
Set it up like this:
Set the current control to full scale and the voltage to zero. Turn on
the power.
Start the water flowing through the chamber.
Gradually increase the voltage and watch the current rise in response.
Once the current exceeds the amount we calculated (6A for 10 ppm in 160
gallons in 15 minutes) by maybe a few amps, start turning the current
control *down* until it starts to regulate the current by reducing the
voltage being supplied to the cell. Adjust the current to your desired
setpoint.
Now it's in current limiting mode and will continue to adjust the
voltage up or down in response to changing conditions, so long as the
voltage needed is no more than you have the voltage control set for.
As long as you keep it in current control mode, you will have a very
accurate measure of the weight of silver you're putting into the water
in any given period of time. It should even be relatively independent
of water quality, temperature, and moderate changes in flow rate.
Does that start to make sense? I think you've got the makings of a very
nicely controlled system.
Be well,
Mike D.
[Mike Devour, Citizen, Patriot, Libertarian]
[[email protected] ]
[Speaking only for myself... ]
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