Thermo Scientific Surveyor UV Plus Hardware Manual page 56

3
Maintenance
Lamp Maintenance
Removing the Deuterium Lamp
40 Surveyor UV/Vis Plus Detector Hardware Manual
Note Two mercury columns separated by a small electrolyte gap fill the glass capillary
tubing that is visible in the chronometer window. With lamp usage, the mercury
column on the left side of the gap increases and the mercury column on the right side
of the gap decreases. This transfer of mercury moves the gap from left to right as a
function of lamp usage.
Figure 30. Electrolyte gap in the mercury tube at 400 hours
0
 To remove the deuterium lamp
1. Remove the deuterium lamp cover as described in
Reading Its Chronometer"
2. Gently unplug the deuterium lamp lead from the detector (see
to twist the connector.
Figure 31. Deuterium lamp parts
Deuterium lamp lead
3. Remove the two thumbscrews with standoffs that hold the lamp assembly in place and
pull the assembly straight out.
HOURS
Lamp usage marker at 400 hours
"Accessing the Deuterium Lamp and
on page 38.
2000
Figure 31). Take care not
Thumbscrews
Deuterium lamp
Thermo Scientific