Agilent Technologies 7820A

Agilent 7820 GC Service
141
 2-mL sample vials or equivalent for sample
 Chromatographic-grade helium as carrier, makeup, and
reference gas
Verify the following:
 Chromatographic-grade gases plumbed and configured:
helium as carrier gas, nitrogen, hydrogen, and air.
 Empty waste vials loaded in sample turret.
 4-mL solvent vial with diffusion cap filled with isooctane
and inserted in Solvent A injector position.
Install the evaluation column. (See the procedure for the SS or
PP in the Maintenance manual.)
 Bake out the evaluation column for at least 30 min at
180 °C. (See the procedure for the SS or PP in the
Maintenance manual.)
 Be sure to configure the column.
Create or load a method with these parameter values.
TCD Checkout Conditions
Column and sample
Type
HP-5, 30 m — 0.32 mm — 0.25 µm
(19091J-413)
Sample
FID/TCD checkout 18710-60170
Column flow
6.5 mL/min
Column mode
Constant flow
Split/splitless
inlet
Temperature
250 °C
Mode
Splitless
Purge flow
60 mL/min
Purge time
0.75 min
Purged packed
inlet
Temperature
250 °C
Detector
Temperature
300 °C
Reference flow
(He)
20 mL/min
Makeup flow (He)
2 mL/min
Baseline output
< 30 display counts on Agilent
ChemStation (< 750 µV)
Oven
Initial temp
40 °C