Agilent Technologies 7820A

Agilent 7820 GC Service
155
Typical values
The following are typical values for the detector results. The
results for a detector depend on site preparation related factors.
These are not pass/fail criteria.
Table 4.
FPD P filter
Typical range after
24 hours
Limits at
installation
MDL (pg/sec)
0.12 to 0.18
≤ 0.2
Peak area
16000 to 30000
≥ 16000
Signal height
5000 to 11000
--
Noise
1.6 to 3.0
≤ 4
Half-width
(min)
0.05 to 0.07
--
Output
34 to 80
≤ 80
1 Install the sulfur filter and filter spacer.
Make the following method parameter changes.
Sulfur method parameters (S)
Parameter
Value ( mL/min)
H2 flow
50
Air flow
60
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 1 hour.
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.
If using a data system, prepare the system to perform one run
using the loaded checkout method. Make sure that the data
system will output a chromatogram.
Start the run.
If performing an injection using an autosampler, start the run