STATUS SCIENTIFIC CONTROLS
FGD3 Infrared Gas Detector Heads
TD06/024
Issue:
7
Change Note:
1904
Page 26
5.2.18
C: 36
– Negative Span Temperature Compensation
This option is used to apply temperature compensation to the sensor, a zero value
results in no applied compensation.
The value can be either positive or negative, depending upon the type of sensor fitted.
The value is best selected by first calibrating the sensor at 20
C then lowering the
FGD3 to -10
C. When the temperature is stable, usually after 2 hours, the value is set
such that an accurate gas reading is displayed.
Note:
changing this value from the factory setting may make the readings
inaccurate
– consult Status Scientific Controls Ltd before making any
changes.
•
Press MENU to open the menu system.
•
Using the NEXT and PREVIOUS buttons, select menu option:
C:36
•
Press ENTER.
•
Using the INCREASE and DECREASE buttons, set the required
temperature compensation value.
•
Press ENTER to store the new value.
Note: Pressing the MENU button rather than the ENTER button exits
without any change.
•
Press MENU to close the menu system.
5.2.19
C: 44 - Signal conditioning
This option is used to apply averaging to the sensor output. This option is available so
that the FGD3 can be set for optimum response time while maintaining a stable
reading.
The value can be increased to obtain stable readings at the expense of increasing the
time taken to read gas.
Note:
changing this value from the factory setting may make the readings
unstable
– consult Status Scientific Controls Ltd before making any
changes.
•
Press MENU to open the menu system.
•
Using the NEXT and PREVIOUS buttons, select menu option:
C:44
•
Press ENTER.
•
Using the INCREASE and DECREASE buttons, set the required
averaging value.
•
Press ENTER to store the new value.
Note: Pressing the MENU button rather than the ENTER button exits
without any change.
•
Press MENU to close the menu system.
