Knauer K-2600 Handbuch Seite 23

Operating the Photometer 23
If the wavelength range is changed, spectral data in the memory of
the K–2600 UV detector are erased.
Scan Autozero
Before scanning spectra the K–2600 UV detector must perform a scan
autozero. The scan autozero measures the spectrum of the eluent.
These data are stored for correction of the spectra of your analytes with
the spectrum of your solvent. Thus, a new scan autozero should be
performed each time when the solvent is changed. A scan autozero is
performed by pressing the red Auto Zero button for 1 sec. or longer.
The autozero is then measured and calculated over the wavelength
range set for scanning.
Performing wavelength scans
For acquiring scan data, enter the scan menu by pressing the yellow
Scan button once. When pressing the Scan button a second time, a
scan is performed immediately.
For taking different scans during a run, please be sure to adjust the
scan number between scans. Stored scans are overwritten without any
message, when the Scan button is pressed twice.
Output of Scan Data
The stored scan data can be given out via analog outputs and with
defined data rates. Time scaling of the data can be adjusted between 1
and 50 steps per second (that is approximately 1-50 nm/s) in the
SETUP menu of the photometer, see section "SCAN OUT" on page 12.
Low output speed settings lead to enhanced spectral resolution of the
data output.
To release the output of scanned data, move the cursor using ⊲ to the
OUT field in the scan menu and press ∆ or ∇ to start the scan output.
Make sure that the desired scan number is chosen. Since every scan is
kept in internal storage it can be edited or given out several times.
Scans are deleted by overwriting with new scan data and in case the
wavelength range was changed.