6
Routine Maintenance
Recommended Maintenance
84
Accela PDA Detector Hardware Manual
Thermo Scientific
Recommended Maintenance
lists recommendations for routine maintenance of the Accela PDA Detector. Use the
table as a basis for developing your maintenance program in accordance with your company
practices.
Table 3.
Recommended routine maintenance
Procedure
Interval
Cleaning external surfaces
As needed
LightPipe flowcell cleaning
As needed
*
*
Good Laboratory Practice (GLP) dictates flushing the LightPipe flowcell with clean solvent after every use. This
practice reduces the frequency of cleaning the LightPipe flowcell.
Wavelength calibration
After lamp replacement or as
needed
Dark current calibration
(Calibrating the dark current increases the linearity of the
detector at the high end of its operating range. The dark
current does not significantly affect absorbance values
between 0.2 AU and 0.8 AU. The dark current is a
function of temperature.)
After 100 hours of use or
monthly, whichever comes
first
After significant changes
(>4
°
C) in ambient room
temperature
After lamp replacement
Event log printout
Weekly
Operation verification
Semi-annually
Lamp replacement
Deuterium (D2)
Replace the deuterium lamp
when the detector noise
reaches an unacceptable level
(see
).
The useful lamp lifetime is
approximately 1000 hours at a
diode array scan rate of 40 Hz
and 2000 hours at a diode
array scan rate of 20 Hz.
Tungsten (W)
Every 2500 hours or as
required
Adjust attenuators
As needed
Update firmware
As needed and as updates
become available
