User guide

Chromatographic Checkout 4
Advanced User Guide 103
Sulfur performance
12 Install the sulfur filter.
13 Make the following method parameter changes.
14 Ignite the FPD flame, if not lit.
15 Display the signal output and monitor. This output typically
runs between 50 and 60 but can be as high as 70. Wait for the
output to level off. This takes approximately 2 hours.
If the baseline output is too high:
• Check column installation. If installed high, the stationery
phase burns out and increases measured output.
• Check for leaks.
• Bake out the detector and column at 250 °C.
• Wrong flows set for installed filter
If the baseline output is zero, verify the electrometer is on
and the flame is lit.
16 If using a data system, prepare the data system to perform
one run using the loaded checkout method. Make sure the
data system will output a chromatogram.
17 Start the run.
If performing an injection using an autosampler, start the
run using the data system or press [Start] on the GC.
Noise 1.6 to 3.0 ≤4
Half-width (min) 0.05 to 0.07 —
Output 34 to 80 ≤80
Table 19 Sulfur method parameters
Parameter Value ( mL/min)
H
2
flow 50
Air flow 60
Table 18 Evaluating checkout runs
FPD P filter Typical range after 24
hours
Limits at installation