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26.
The display will read “Zone 1 Trip 2: Off”. Press & hold Enter until CX224 re-
initializes the controller (about 3 seconds).
27.
The current temp reading will now be displayed on the controller for Zone 1.
28.
Heat the sensor until the alarm and output trip. (Hold onto the sensor to increase
the temperature of the sensor or place inside of a plastic bag and then place the
bag and sensor into a cup of warm water).
29.
Press Enter to silence the alarm. (Note: With the configuration settings above, the
alarm will continue turning on every minute until the temperature falls below the
trip point and hysteresis band).
30.
Maintain the sensor above 85º F. After 1 minute the alarm will resound. Press
Enter to turn the alarm off. To prevent the alarm from resounding allow
temperature to fall below hysteresis level for alarm trip point.
31.
Allow the sensor to cool so that Output 1 will untrip. Output 1 will turn off at 80º F,
due to the hysteresis setting of 5.
32.
With the CX224 operating, remove a wire from the sensor on one of the terminals
on the CX224.
33.
The alarm will sound because the CX224 is configured to sound the alarm on a
failed sensor.
34.
Reconnect the wire that was removed.
35.
The CX224 will resume reading the input and turn off the alarm.
You have now configured Zone 1 to trip on an over temp condition using hysteresis to
untrip. This means the controller will trip the outputs when the sensor reads a value of
75º F or higher and will not untrip until below 80º F.
Example 2: Under Temp Operation with Hysteresis @ 5
º
F
Note: Procedure is similar to Example 1, expect need to configure controller for “Under
Temp instead of “Over Temp”. Follow the guidelines below for complete instructions
on configuring the controller
1.
Press and hold any one of the keys on the front panel until the main menu is
displayed.
2.
Move the cursor to option 2. Configuration, then press Enter.
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