KEYPAD FUNCTIONS
2.6 Contrast
In the main menu screen, the contrast of the display can be adjusted by pressing and touching the
Contrast icons on the LCD until the desired contrast level is obtained.
Light Dark
2.7 Backlight
#7 key
The ECOM J2KN is equipped with a backlit digital display for easy viewing. Simply press the
Backlight key to illuminate the display. To turn off, press again and the light will go off.
2.8 CO Bypass
F3 key / #3 key
The J2KN is equipped with an automatic & manual CO Bypass to protect the CO sensor from over-
range conditions. When levels exceed the programmed CO limit, an automatic CO bypass activates a
small purge pump to divert the gas and purge the CO sensor. This function can be activated
manually, if needed, by pressing the F3 key. The display will show “----“ for the CO value when the
Bypass pump is activated. Once the CO concentration drops below 50% of the limit value, the pump
will de-activate automatically, if activated automatically, or can be turned off by pressing the F3 key
again. will activate allowing fresh-air to purge the CO-sensor. Adjusting the CO limit value will be
addressed in the Calibration section.
