Thermo Scientific Accela PDA Hardware Manual page 94

5
ChromQuest Diagnostics for the PDA Detector
Calibrating the PDA Detector from the ChromQuest Data System
74 Accela PDA Detector Hardware Manual
The PDA detector briefly turns the lamps off as it performs the dark current calibration
routine. After it completes the dark current calibration, the PDA detector turns the lamps
back on.
Note The dark current calibration program does not run when data collection is enabled
on the Display page.
To perform a dark current calibration of the diode array
1. Prepare the PDA detector for calibration (see
Calibration" on page
2. Open the Diagnostics dialog box for the Accela PDA Detector (see
Controls for the Accela PDA Detector"
3. Click the Calibration tab.
The Calibration page appears.
4. In the Array area, click Execute.
A message box appears (see
Figure 61. Calibration preconditions dialog box
5. Make sure that the lamps are warmed up, that the pump is running at 1 mL/min, and
that the filter wheel is in position 1 (see
The status of the calibration procedure appears by the Status readback area on the
Calibration page. During the dark current calibration, the lamps turn off before the data
system collects the intensity scans. After the last calibration event, the lamps turn back on.
6. Click OK to finish the calibration.
The date and time of the calibration appear in the Array area of the Calibration page and
are stored in the PDA detector's memory.
"Preparing the PDA Detector for
73).
on page
Figure 61).
Figure 20
"Accessing the Direct
62).
on page 25), and then click OK.
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