Agilent Technologies 6850 Series II User Information page 71

Noise, wander and drift
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Path
View
View/Data Analysis/Report/Specify Report
View/Method/Save Method As
Instrument menu/Edit Parameters
View/Run Control/Sample Information
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Released: March 2004
Make these settings on the ChemStation:
Press Start to make a blank run, then wait until it is finished.
Select View/Data Analysis. Load the data file for the blank run just
completed.
Select Report/ Specify Report. Choose printer and screen.
Select Integration/ Integrate.
After integration is completed, Select Report/Print Report. The
report will list measurements for noise (peak to peak, % standard
deviation, and ASTM) and for drift and wander.
ASTM noise should be < 3.0 Hz.
Wander (for a 2-minute time window) should be < 5 Hz.
Drift (for a 5-minute time window) should be ≥ .|15| Hz/hour
6850 Series II GC User Information
Setting
Full Menu
Performance + noise, OK
System Suitability, Edit Noise Ranges, enter sev-
eral ranges that >1.01 min plus one at 5 min,
OK
Supply name
Oven, verify oven temp = 40°C
Initial time = 12 min, Rate 1 = 0°C/min, OK
Enter directory and file names, close window
Verifying Performance
µECD Checkout
page 71 of 256