
Setting the Alarm Point
The 977CM features an adjustable alarm that will alert the operator when the Ion
Output of the ionising system falls below a desired level or when a system fault is
detected.
As the ionisers become contaminated, the 977CM increases the output voltage to
maintain maximum Ion Output. When the maximum voltage has been reached and the
ionisers become further contaminated, the Ion Output will slowly start to decrease and
will reduce the system’s performance. At this point the ionisers need cleaning.
To alert the operator to the need for cleaning, the 977CM will trigger an in-built audible
alarm and the LCD screen will flash on and off. A remote alarm can also be triggered
using the alarm relay connections on the output socket.
The alarm point is set as a percentage of maximum Ion Output. An initial value of 60%
is recommended.
To set the Alarm Point.
1. Press
to enter menu
2. Select option 4 “Alarm” and press
3. Use the up and down button to change the value
4. Press
to store the setting
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