5
ChromQuest Diagnostics for the PDA Detector
Verifying Operational Performance
Thermo Scientific
Surveyor PDA Plus Detector Hardware Manual
75
Figure 69.
Display page with an intensity scan of the light output from both lamps
7. View an intensity scan of the tungsten (W) lamp:
a. In the Lamps page, turn Off the deuterium (D
2
) lamp.
b. Return to the Control page and change the Discrete Channels settings to monitor
diodes 219, 302, and 427.
c.
Click
Load To Detector
. A dialog box containing the following message “Method
Has Been Downloaded” appears. Click
OK
.
d. Open the Display page and click
Start
to refresh the display.
e.
As with the D
2
and combined lamp spectra, save a copy of the scan for your
maintenance records (see
).
Note
These diodes roughly correspond to the wavelengths of 450 nm, 550 nm,
and 699 nm, respectively. The Discrete Channels area on the Display page
contains a digital readout for the selected diodes (see
). Record these
readout values to track the performance of the tungsten lamp. You can also use
other diode values to track the performance of the Tungsten lamp.
