MSA GasGard XL Manuel D'utilisation page 25

The second screen displays:
Time delay for alarm activating (0 - 180 seconds);
Delay:
In ATEX version default value is "0".
Hysteresis: Defines Alarm 1 and Alarm 2 hysteresis (from 0 to ±2.0 % full scale).
Dead Band: Defines zero baseline (from 0 to ±5.0 % full scale). Default is ±2.0 %.
The second screen contains only the "Delay" parameter.
If FlameGard is selected from the sensor list, the setting menu changes to the following screen.
(4) Use control push buttons to:
Accept changes and leave menu
Do not accept changes and leave menu
Return to the System menu.
Modifying Channel Parameters
(1) Enter into System menu (see Chapter 5.1 "System Menu").
(2) Use control push buttons to select a channel number to modify and press [ENTER] to confirm.
The first of two configuration screens displays.
NOTE: Use [DOWN] to toggle between the two screens:
GasGard XL
Configuration
US
25