Hach-Lange DR 3800 User Manual - Manual (Page 115)

115
Advanced Operations
6.8.3.5 Drift check
The Drift Check test is used to test the stability of the instrument.
Note: The Drift Check runs 1 hour.
1. Press Drift Check in the Optical Checks menu.
2. Press λ to input the wavelength.
3. Input the wavelength and press OK to confirm.
4. Press Start.
5. The Drift Check runs 1 hour.
This test takes a reading every minute for one hour. Every
fifteen minutes, linear regression is used to calculate the slope
(rate of change) for the previous fifteen minute interval.