Agilent Technologies 6890 Series Service Manual page 500

Detector
Temperature
H flow
2
Air flow
Makeup+column flow
*Offset
Oven
Initial temp
Initial time
Rate 1
Final temp
Final time
*Note: 6890 firmware A.03.03 or greater is recommended for slower bead
activation. Usually, an NP bead offset of 30 pA is sufficient. Higher offsets
reduce bead life.
Note: Always cool the detector below 150°C before changing a bead. The offset,
with the bead off but at temperature and all gases on, should be less
than 0.9 pA.
Jun 2001
NPD checkout conditions and chromatogram
325° C
3 mL/min
60 mL/min
10 mL/min, nitrogen
50 pA
60° C
0 min
20° C/min
200° C
3 min
Performance Verification
Agilent 6890 Gas Chromatograph Service Manual
Checkout Chromatograms 610
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