Ntron Microx Online, User Instruction Manual

Page: 26 / 29

Issue: 1.14 Rev. 1.0 Page 24
4.1.18 Menu 18
– Alarm levels
Note: When the option of the Light Tower indicator is fitted, Relays 1 or Relays 1 and 2
will be used to operate the Red, Green Lamps and Audible alarm. Thus only Relay 3 is
typically available for customer interface connection. The programming of Relay 3 can
be matched to either Relay 1 or Relay 2 or another Oxygen level setting as required..
This option allows the user to set the operation of the alarm levels. There are
three alarms levels associated with 3 relays.
Alarm level 1 is associated with relay 1.
Alarm level 2 is associated with relay 2.
Alarm level 3 is associated with relay 3.
•
Press MENU to open the menu system.
•
Using the NEXT and PREVIOUS buttons, select menu option:
E:18
•
Press ENTER. The display displays A:1
•
Use the UP / DOWN keys to select the desired alarm level.
•
Press ENTER. The display shows the alarm level.
•
Use the UP / DOWN keys to set the desired alarm level.
•
Press ENTER to store the new value in the memory.
Note: Pressing the MENU button rather than the ENTER button
exits without any change.
•
Press MENU to close the menu system.
4.1.19 Menu 19
– Alarm hysteresis
The unit has a hysteresis value associated with the alarm levels to
avoid relay chattering as the unit goes in and out of alarm conditions.
The hysteresis value is expressed as a percentage of the alarm set
point and takes a value of between 0 and 10.
•
Press MENU to open the menu system.
•
Using the NEXT and PREVIOUS buttons, select menu option:
E:19
•
Press ENTER. The display shows the hysteresis level.
•
Use the UP / DOWN keys to set the desired level.
•
Press ENTER to store the new value in the memory.
Note: Pressing the MENU button rather than the ENTER button
exits without any change.
•
Press MENU to close the menu system.