Controls And Functions; Front Panel Display And Controls - Desco EMIT C/E Series Owner's Manual

Safety interlock switches are
provided internally on each
emitter cassette. This ensures that
power is cut off in the event that
any cassette is removed or not
fully installed.
The grills below each fan function as
sensors and feed back a signal to the
balance circuitry. Therefore, it is
important not to hang or attach
anything to the fan grills.

Controls and Functions

Figure 4. Control Panel
• The CONTROL PANEL is
located on the right hand end of the
ionizer. It provides controls for fan
speed, balance, and a key switch to
prevent unauthorized adjustment of
the controls. Also located on the
control panel is an I/O port that may
be used for auto calibration. It also is
used to provide output signals to
allow remote monitoring of ionizer
status.
• OFF/SET/LOCK key switch - this
switch controls the power to the
ionizer. When the SET position is
selected, it allows the balance and
fan speed to be adjusted. When the
LOCK position is selected, a LOCK
indicator is illuminated on the front
Figure 5. Front panel and controls
TB-6529 Page 4 of 9
panel of the ionizer. In this position,
the balance and fan speed controls
are disabled and the key is
removable. In the OFF position,
power is shut off to the ionizer and
the key is removable.
• FAN speed adjustment switches
are used to set the fan speed to the
desired level that provides the best
performance while minimizing
operator discomfort. With the key
switch in the SET position, pressing
and holding the "+" symbol will
increase fan speed, and the "-"
symbol will decrease fan speed.
Relative fan speed is displayed on
the front panel indicator.
• BAL controls are used to adjust
the balance of the ionizer and are
used in conjunction with a charged
plate analyzer. Pressing the "+"
symbol will shift the balance offset
positive, while pressing the "-"
symbol will shift it negative.
Adjustment should be made with a
charged plate analyzer located 24"
directly under the ionizer. The BAL
controls, like the FAN speed, are
only adjustable when the key switch
is in the SET position.
• I/O PORT serves a dual purpose.
It accepts signals from a charged
plate analyzer and automatically
calibrates the ionizer when the key
switch is in the SET position. It also
outputs ionizer status signals that
can be useful for remote monitoring.
• IEC INPUT CONNECTOR,
based on the International IEC
60320 Standard, allows the power to
be disconnected at the ionizer and
provides a fuse drawer for a 5mm x
20mm fuse. The fuse drawer may be
opened when the cordset is removed.
In addition, an IEC Outlet on the
opposite end of the ionizer can
supply power for a charged plate
analyzer, or for up daisy-chaining a
second unit.
Front Panel Display and
Controls
See figure 5.
System Status is the information
center on the front of the ionizer.
From it, the operator can easily
check the operational status of the
ionizer.
• PWR - this indicator will normally
be green when the ionizer is
operating correctly. When the
autobalance circuit can no longer
adjust for dirty emitter pins, this
indicator will turn red and begin to
flash. It is normal for it to flash for
a few seconds each time the ionizer
is turned on. This indicator will be
on when the key switch is either in
the "SET" or "LOCK" position.
• LOCK - when the key switch on
the end of the ionizer is set to lock,
this indicator will display a
© 2007 DESCO INDUSTRIES INC.
Employee Owned