Ir Display Functions; General; Using The Display - Crowcon IR Display Instructions D'installation, D'utilisation Et De Maintenance

2.1 General

The IR Display features a 4-digit LCD with backlight, ultra-bright green, amber and red status
LEDs and a key-pad for accessing menus. IS terminals are fitted for connecting HART Hand-
Held communicators for calibration and accessing diagnostic information. HART functionality
is an option: refer to Section 3.2.3 & HART manual for details.
The IR Display shows the %LEL flammable gas concentration, and current operating status
(Normal, Alarm or Fault). The key-pad can be used to display the detector signal current,
supply voltage, and optical obscuration level.

2.2 Using the display

The keys below the screen are made of elastomer. They have a slightly different feel from
hard keys. Be sure to press firmly on the 'Up' and 'Down' keys to select options allowing
you to operate the display to view data or change settings. Pressing buttons will generate
a 'beep' sound, double 'beep' for a double press.
Instructions are accepted in the form of single and double presses.
Use the Enter key to access the MENU.
A password protected menu enables access to further functions: detector zero, detector
calibration, output signal simulation, output signal adjustment (see Sections 4 and 5).
For further details on each operation see Sections 6 to 10 below.
Current value
of gas levels
or other
information as
selected
Countdown
timer
Diagram 3

2. IR Display functions

Up
Gas
measurement
units
Progress
bar
Down Enter
Current
operating
status
3