5101015-01 Rev 2 20
4.4 Balance & Ion Output Test
Ion balance (offset voltage) and ion output (discharge time) are
measured using a charge plate monitor such as the Simco-Ion
Model 280A Charged Plate Monitor. The standard for this test
procedure is ANSI/ESD STM3.1. The typical testing interval is six
months. Inspect air filter and clean the ion emitter point before
testing.
Ion Balance
Position nozzle of gun 2” (50 mm) from center of
sensing plate on charged plate monitor. Set-up
charge plate monitor to measure ion balance
according to the manufacturer's instructions.
Activate gun by pressing trigger, adjust input air
pressure to 50 psi (3.5 bar) and fully open flow
control knob in gun handle. The ion balance
potentiometer is just beneath the trigger on the gun,
adjust it with a standard trim pot tool or insulated screwdriver. Allow
ion balance reading to stabilize and adjust ion balance if necessary.
If ion balance cannot be adjusted to zero, the ion balance offset may
need to be adjusted.
Ion Balance Offset
Center ion balance potentiometer on the gun.
Activate gun by pressing trigger. The ion balance
offset potentiometer is accessed through a hole on
the side of the power unit, adjust it with a standard
trim pot tool or insulated screwdriver. Adjust the ion
balance offset potentiometer for an ion balance as close to zero as
possible. It may be necessary to adjust the ion balance
potentiometer on the gun to achieve an ion balance of zero.
Ion Output
Position nozzle of gun 2” (50 mm) from center of sensing plate on
charged plate monitor. Set-up charged plate monitor to measure
discharge time according to the manufacturer's instructions.
Activate gun by pressing trigger, adjust input air pressure to 50 psi
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