Watlow Series 945 High/Low Limit Control - Manual (Page 8)

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WATLOW Series 945 High/Low Limit User's Manual
Keys/Displays
How to Use the Keys and Displays
Upper Display
Red, 0.56" high, seven segment, four digit LED display, indicat-
ing either process actual temperature, the operating parameter
values, or an open sensor. When powering up, the Process
display will be blank for 8 seconds.
UP Key
Increases the value of the dis-
played parameter. A light touch
increases the value by one. Hold-
ing the key down increases the
display value at a rapid rate. New
data is self entering in 5 seconds. DOWN Key
Decreases the value of the displayed
parameter. A light touch decreases
the value by one. Holding the key
down decreases the displayed value
at a rapid rate. New data is self
entering in 5 seconds. Front Panel
Locking Screw
Secures or releases
the control chassis in
its case.
UP/DOWN keys
When pressed simultaneously for 3 seconds, the Set Up Menu will appear
displaying the LOC parameter. At the LOC parameter, continue to press
the UP/DOWN keys, and the Calibration Menu will appear.
NOTE:
The Upper display
will automatically
display the process
value after 1 minute
without key strokes.
MODE Key
Steps the control through the Op-
erating menu; also, in the Auto
mode, enters new data selected
less than 5 seconds previously .
F & C
Indicates the displayed tempera-
ture is in degrees Fahrenheit (F) or
Celsius (C). If neither F or C are lit,
the 945 is displaying process vari-
able units.
Figure 12 -
Series 945
Displays
Lower Display
Red 0.56" high, seven segment,
four digit LED display, prompts for
data in the upper display, or error
and alarm codes.
A1 & A2
When lit, A1 indicates the
audible alarm is active.
When A2 is lit, the relay
outputs are de-energized.
ALARM CLEAR Key
Pressed once, it silences
the audible alarm and A1
is no longer lit. If pressed
again, the alarm relays
are reset, A2 is no longer
lit, and the alarm message
is cleared.