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February 1998

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Sat, 28 Feb 1998 16:22:14 EST
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Mr. Hew How Chee:
- Measuring ion flux is not a major problem.  Build an ion flux detector as
follows: Make a "charge plate" out of a piece of alum., brass, copper,
(anything of that sort).  The plate needs to be about 15cm square (15cm X
15cm).  Get a piece of screenwire the same size as the charge plate. The
screenwire should have approximately 3mm to 6mm screen grids and mount the
screenwire parallel to, but about 6mm to 8mm in front of the charge plate.
Keep the screenwire and the charge plate electrically isolated from each
other.  Get a High Voltage DC power supply (3,000 to 4,000 volt range) and
connect the positive voltage (+3,000 V-dc) to the charge plate.  Connect the
return (ground) side of the power supply to the screenwire.  Put a nanoammeter
( 0 + 20 nanoamp) in the ground wire between the screenwire and the return
side of the power supply.  Turn the power supply on at about 3,000 volts and
check to make sure no current is registered on the nanoammeter.  (If any
current registers you have a high-resistance short or leak in the system which
must be eliminated before continuing.)  When no current flows with the power
supply turned on, move the air ionizer to about 1-meter in front of the
screenwire/charge plate and turn the ionizer on.   The nanoammeter will
register a current which indicates the quantity or volume of positive ions
generated (negative ions will all be attracted to the charge plate).  To see
if your ionizer is balanced (that is producing the same number of positive and
negative ions) just reverse the polarity of the system (+ voltage on the
screenwire and negative (return side) on the charge plate.
- Hope this method helps confirm/deny that your ionizer works.
Regards, Jim Moffitt, Moffitt Enterprises Consulting Service.

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