Setting Up The Spectral And Discrete Channel Displays - Thermo Scientific Accela PDA Hardware Manual

5
ChromQuest Diagnostics for the PDA Detector
Adjusting the Light Throughput with the ChromQuest Data System

Setting Up the Spectral and Discrete Channel Displays

70 Accela PDA Detector Hardware Manual
To set up the spectral and discrete channel displays
1. Open the Diagnostics dialog box for the Accela PDA Detector (see
Controls for the Accela PDA Detector"
2. Turn on both lamps (see
page 63).
3. Download the parameters for the spectral display:
a. Click the Control tab.
The Control page appears (see
b. In the Mode area, select the Intensity option.
c. Click Default, and then verify that the following parameters are specified:
Start = 2
End = 511
Step = 1
d. Click Load To Detector.
4. Determine the diodes of maximum output for the lamps as follows:
• From the spectrum displayed, determine and record the pixel of maximum intensity
within the 10 to 40 diode range. This is the diode of maximum output for the
deuterium lamp.
• From the spectrum displayed, determine and record the pixel of maximum intensity
within the 400 to 500 diode range. This is the diode of maximum output for the
tungsten lamp. Ignore the spike at approximately diode number 380. This spike is an
emission line of the deuterium lamp.
5. Turn off the data stream as follows:
a. In the Status area, click Off .
b. In the Data area, click Stop.
6. Set the discrete channel displays as follows:
a. Click the Control tab to return to the Control page.
b. In the Channel A box, type the value for the diode of maximum intensity for the
deuterium lamp.
c. In the Channel C box, type the value for the diode of maximum intensity for the
tungsten lamp.
d. Click Load to Detector.
on page 62).
"Controlling the Lamps from the ChromQuest Data System"
Figure 56 on page
"Accessing the Direct
66).
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