Chromalox CX224 Setup Tutorial Download Page 17 | Manualshive

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Chromalox CX224 Setup Tutorial Download Page 17

Chromalox Tel: 615-793-3900 • Fax: 615-793-3563 • www.chromalox.com

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Using Hysteresis – The outputs will untrip when the input value exits the hysteresis
(deadband) limit.

Note: The order of precedence for the methods of untrip is Manual Reset Only,
Pressing Enter, and then Using Hysteresis. This means that if at any time an output is
tripped and configured by an zone to untrip using Manual Reset Only, the only way to
untrip that zone is using the Manual Reset.

Note: When any zone causes a trip for an output, all zones that have caused a trip on
that output will be refreshed. This means that if an output has been tripped and then
cleared by pressing Enter and another zone causes that output to retrip, the output
will act as though both trips have reoccurred at the same time to cause the output to
trip. So, if the second trip were to reset by dropping below the programmed
hysteresis value, the output will still be tripped, due to the first zone, which caused the
trip. To reset the output again, Enter would need to be pressed.

Set Hysteresis:

- Hysteresis is the amount that the reading must move past the trip

value before the outputs will reset. For example, the system is configured to trip at
100ºF, has a 10ºF hysteresis and will trip Output 1 on an over temperature reading.
The reading increases to 100ºF, so Output 1 trips. The reading will need to go below
90ºF before Output 1 will reset.

1382 Heil Quaker Blvd.

LAVERGNE, TN 37086
Phone: 615-793-3900

Fax: 615-793-3563

www.chromalox.com

http://www.chromalox.com

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Summary of Contents for CX224

Page 1: ... Over Temp Operation with Alarm and Output Tripping Separately D Example 4 Under Temp Operation with Alarm and Output Tripping Separately E Example 5 Over Temp Operation with Pressing Enter F Example 6 Over Temp Operation with Manual Reset E Example 7 Over Temp Operation with Offset F Example 8 How to Rename Zones G Example 9 How to Exercise Relays H Example 10 How to Freeze Outputs 3 Definition o...

Page 2: ...uick Reference Guide Note Holding down any button for 3 seconds and you will be put into the main menu 2 Configuring Controller for Operation Example 1 Over Temp Operation with Hysteresis 5º F 1 Begin by placing the CX224 on a desk or table 2 Connect one senor to the unit note which type of sensor you have connected 3 Apply power to the CX224 The display should light and the message Initializing I...

Page 3: ...ress Enter This will allow the user to choose the zone that will be displayed on the CX224 17 Set Minutes of Alarm Silence when a key is pressed to 1 minute then press Enter This will cause the alarm to resound 1 minute after the output has been tripped if the current reading is still above the trip setting 18 Set If an input fails to Sound Alarm then press Enter This will cause the alarm to sound...

Page 4: ... 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 inpu...

Page 5: ...r 11 Set If an input fails to Sound Alarm then press Enter 12 Set Zone 1 to the input type that has been connected to Zone 1 on the controller then press Enter 13 Set Zone 1 Trip 1 to 65º F then press Enter 14 Set Zone 1 Trip 1 Trip Over or Under to Under then press Enter 15 Set Zone 1 Trip 1 Sound Alarm on trip to Yes then press Enter 16 Set Zone 1 Trip 1 Outputs to trip to Output1 Y and the othe...

Page 6: ... will not untrip until above 70º F To enter programming the password must be entered This shows how the password protection can prevent unauthorized users from changing the settings Example 3 Over Temp Operation with Alarm and Output Tripping Separately 1 Enter Configuration menu The password 1111 will be used to gain entry Choose 1 Change Password and press Enter Select Program Password and enter...

Page 7: ...tinue to heat the sensor further until Output 1 trips at 90º F The alarm and output should both be tripped now 21 Press Enter to clear the alarm 22 Allow the sensor to cool so that Output 1 will untrip Output 1 will turn off at 85º F and Alarm will turn off at 80º F due to the hysteresis settings of 5 You have now configured Zone 1 Trip 1 on an over temp condition using hysteresis to untrip and Zo...

Page 8: ...d Zone 2 Choose Input Type No Input Connected Press hold Enter until CX224 re initializes 16 The current temp reading will now be displayed on the controller for Zone 1 17 Cool the sensor until the alarm trips Put sensor in a freezer or place sensor in a bag and place in cold water 18 Continue to cool the sensor further until Output 1 trips at 60º F The alarm and output should both be tripped now ...

Page 9: ...isplayed on the controller for Zone 1 12 Heat sensor until alarm and output trip 13 Press any button but Enter to silence the alarm 14 Press Enter and output will untrip If the output temperature after pressing Enter is still high alarm will not resound or retrip until temp falls below set hysteresis band The output will also untrip regardless of pressing Enter if temp falls below 80º F the hyster...

Page 10: ...rm 13 To untrip output hold down any of the buttons for at least 3 sec and move cursor to 3 Manual Reset then press Enter 14 This is the only way to reset this output The change in temperature will have no effect on the controller once the output has been tripped until the CT244 has been manually reset You have now configured Zone 1 to trip on an over temp condition using Manual Reset Only to untr...

Page 11: ...for changing the letters numbers and the right arrow for moving to the next letter number 5 After Zone name is changed press hold Enter until CX224 re initializes and the CX224 will display the new Zone name Example 9 How to Exercise Relays 1 Press and hold any one of the keys on the front panel until the main menu is displayed 2 Move the cursor to 4 Options then press Enter 3 Select 2 Exercise Ou...

Page 12: ...4 will then return back to the Main Menu with the cursor at Monitor Zones press Enter again 5 The CT 224 will re initialize and return to its normal operating mode displaying Outputs Are Frozen 6 To remove the Frozen Outputs repeat example 10 You have now learned how to freeze and unfreeze the outputs on the CX224 Freezing the outputs will disable the program from changing the state of any output ...

Page 13: ...ll be required to enter the existing password in order to change it If you forget your password the master password can be used it is found on the last page of this manual Available selections are 1 Program Password 2 Unlatch Password 1 Program Password Changes the password that is used to protect the Change Program option 2 Unlatch Password Changes the password that is used to protect Manual Rese...

Page 14: ...tiple CX224 are to be used the addresses should be changed to prevent communication errors The next screen will request setting the baud rate Valid baud rates are 600 1200 2400 4800 9600 and 19200 3 Manual Reset Use this option to reset the outputs if a trip has occurred and Manual Reset Only was selected when configuring the outputs May be password protected 4 Options Options Menu allows the user...

Page 15: ... will use this temperature scale for display Options are F Fahrenheit and C Celsius Zone to be displayed during normal operation Choose how the input readings should be displayed The user can always adjust the displayed reading by pressing keys after 5 seconds the CX224 will resume it s process of displaying the High Low or Scanning through inputs High Highest input reading is displayed regardless...

Page 16: ...ture ranges are shown in the charts found under Choose input type If a value not within the range for the sensor is entered a warning will be displayed and a new valid setting should be entered Trip Over or Under This setting determines when the outputs will trip Over Outputs for the zone will trip when the reading is higher than the trip value Under Outputs for the zone will trip when the reading...

Page 17: ... and another zone causes that output to retrip the output will act as though both trips have reoccurred at the same time to cause the output to trip So if the second trip were to reset by dropping below the programmed hysteresis value the output will still be tripped due to the first zone which caused the trip To reset the output again Enter would need to be pressed Set Hysteresis Hysteresis is th...

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