CAUTION!
5.3 Electrical Connections
The Centurion is provided with a 24VDC AC adapter. This AC adapter provides
electrical ground to the unit via a direct connection through the adapter to the wall
outlet. For this reason the unit should be used with this AC adapter only. The unit’s line
cord should be plugged in to a standard 3-terminal grounded receptacle with line
voltage and frequency of 100-240 VAC, 50/60 Hz. Note that an instrumentation ground
is provided on the rear of the unit for testing and calibration purposes.
SECTION 6 Operation
The Centurion’s ON/OFF switch is located at the rear of the unit. The unit should be
turned on using the switch when 24VDC is provided via the AC adapter. Do not ‘hot
plug’ the AC adapter into a unit when the switch is in the ON position. Switch the unit
off, then insert the 24VDC connection into the unit.
Fan speed is adjustable at the unit’s rear panel using a potentiometer adjustment tool or
small screwdriver. Turning the control clockwise increases the fan output; turning
counter clockwise reduces the airflow. Note that the time required to neutralize static is
dependent on the fan speed setting. For fastest charge neutralizing performance, the
unit should be adjusted for the highest fan speed.
The Ion Balance adjustment located on the rear of the unit tunes the Centurion’s offset
voltage to zero. Typically this adjustment is made as part of scheduled maintenance or
setup. Adjustments to this control should not be made without using the correct
calibration instrumentation.
SECTION 7 Maintenance
7.1 Ion Balance Calibration
The Centurion is delivered from the factory calibrated to a zero volt offset set point. As
part of regular maintenance, or if the unit’s fan speed is changed, the ion balance
calibration should be checked. For calibration, a charge plate monitor (CPM) such as
SIMCO’S EA-4 is required. The CPM should have its ground connected to the
instrument ground provided on the rear panel of the Centurion; this jack accepts a
standard banana plug. For most accurate calibration results, the unit should be
operated at least 30 minutes and the test location should not be subject to other
ionization sources. The operator should wear a grounding wrist strap. With the charge
plate located 12” from the outlet grille of the unit, the ion balance control can be
adjusted for 0V using a potentiometer adjustment tool or small screwdriver.
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