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13.
Detector Configuration
As supplied to the end user, D-Guard
applications most of these 'default' settings should not require adjustment.
The system of configuration menu screens works essentially the same way as those used for the calibration functions.
Navigation uses the same general soft-key layout and the format of the screens is the same as for calibration functions.
The 'Quick-Nav' system screen allows a direct jump to the area of interest to save scrolling through
numerous pages see section 10.3.2 for use of the Quick-Nav function.
The following configuration sections are provided along with the specific parameters that can be adjusted.
13.1. Sensor Configurations
13.1.1
Set Guard Band
This setting allows the user to enable or disable the measurement guard band (or zero-suppression) that assists in
keeping the detector's baseline readings stable. This suppression band is hard coded into D-Guard
readings at zero only whilst they are close to a real zero point. This function is most often used to prevent negative
readings. The user can set the Guard band on or off.
Guard Band OFF
From the Guard Band OFF position, use the up and down soft-
keys to toggle between ON and OFF. Once a change is made,
the 'home' icon changes to the 'save' icon.
2
is configured based on the selected gas type and range. For the majority of
Sensor Setup Main Screen
When 'SET' is selected from the Quick-Nav screen, the main
Sensor setup screen is shown. Select the 'SETTINGS' soft-key to
start sensor configuration.
39
Guard Band ON
Once the change is made and the 'save' icon is showing, the
selection can be committed and saved to eeprom. Once
saved, the 'save' icon reverts to the 'back' icon.
To move to the Set Auto-Zero screen, operate the 'NEXT
PARAMETER' soft-key.
To return home, keep pressing the back soft-key until the main
sensor setup screen is displayed with the home icon showing.
2
D-Guard
2
and holds the
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