5
ChromQuest Diagnostics for the PDA Detector
Adjusting the Light Output from the Lamps
82
Surveyor PDA Plus Detector Hardware Manual
Thermo Scientific
5. In the Axis Properties dialog box, do the following:
a. Select
X-axis
from the list
b. Select the
Use This Range
option.
c.
In the Min box, type
30
.
d. In the Max box, type
50
.
e.
Click
OK
to close the dialog box and to update the scaling of the Spectrum view.
6. From the spectrum displayed, determine and record the pixel of maximum intensity
within the 30 to 50 diode range. This is the diode of maximum output for the deuterium
lamp.
Determining the Diode of Maximum Intensity for the Visible Range
To determine the diode of maximum intensity for the visible range
1. Open the Axis Setup dialog box.
2. Do the following:
a. In the Min box, type
400
.
b. In the Max box, type
500
.
c.
Click
OK
to close the dialog box and to update the scaling of the Spectrum view.
3. 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.
Setting the Discrete Channel Displays
To set the discrete channel displays
1. Turn off the data stream by clicking on
Off
for Status and
Stop
for Data.
2. Set the discrete channel displays as follows:
a. 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
.
