STATUS SCIENTIFIC CONTROLS
Installation, Commissioning & Routine Gas Testing
FGD10B Pellistor Gas Detector
TD18/008
Issue:
10
Change Note:
1904
Page 26
4.6.8.
E : 12
– Sensor cross reference
This option is used to allow the user to calibrate the sensor with a commonly
available gas (e.g. methane or propane) but use the unit to detect a different
gas (e.g. methanol or acetone etc.). This is achieved by adjusting the cross-
reference factor according to the difference in signal that is detected for the
calibration gas compared to the target gas.
•
Press MENU to open the menu system.
•
Select menu mode
E:12
(refer to section
Error! Reference source n
ot found.
) and press ENTER.
•
Press ENTER.
•
Using the INCREASE and DECREASE buttons, set the required
cross-reference factor.
•
Press ENTER to store the new value.
Note:
Pressing MENU instead of ENTER aborts any changes
(the existing factor is displayed on exit).
•
Press MENU to close the menu system.
Ask Status Scientific Controls for advice on settings.
Some typical settings when methane is used for the calibration gas
Target gas
Xref
Comments
Methane
1.00
Propane
1.88
Butane
2.04
Hexane
2.35
Ethane
1.39
Pentane
2.21
Nonane
4.00
Acetylene
1.67
Acetone
2.21
Xylene
3.00
MEK
2.63
These value are typical and must be verified by the user as to the accuracy
of the readings.
