User guide

302 Advanced User Guide
10 Detectors
Use nitrogen makeup gas (instead of helium) for greater
sensitivity.
Setting parameters for FID
To set the FID parameters:
1 Verify:
• Makeup gas is configured
• Installed jet type is correct for column type
2 Press [Front Det] or [Back Det].
Detector gases Flow range mL/min Suggested flow mL/min
Standard installation
Column plus capillary makeup 10 to 60 30
Hydrogen 24 to 60 30
Air 200 to 600 400
With Nickel Catalyst Accessory:
Standard installation
Column plus capillary makeup 10 to 60 30
Hydrogen 24 to 60 30
*
Air 200 to 600 400
With Nickel Catalyst Accessory:
TCD to FID series installation
Column plus capillary makeup 10 to 60 30
TCD switching flow 25
Hydrogen 24 to 60 45*
Air 200 to 600 450
* Detector hydrogen is pressure controlled, where the detector provides a known resistance. If using a nickel catalyst tube, the resistance
changes, and the flow rates displayed by the GC will not be accurate. Measure the actual hydrogen flow using a flow meter at the detector
vent, with all other flows turned off.
Table 66 Recommended starting conditions (continued)
WARNING
Verify that a column is installed or the FID column fitting is
plugged before turning on the air or hydrogen. An explosion may
occur if air and hydrogen are allowed to leak into the oven.