Detector Configuration; Sensor Configurations; Set Guard Band - GasTech D-Guard2 Operator's Manual

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 set 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
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 to a proportion of the of the detector full scale or off.
Guard Band OFF
From the Guard Band OFF position, use the 'up' soft-key to
increase the guard band value.
Once the desired level has been set, use the save icon to store
the change.
To turn off the guard band, set the value back to zero using
the 'down' soft key.
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.
40
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.
2
D-Guard
2
and holds the readings at