7
Detectors Advanced Maintenance
Replacing the FPD Photomultiplier Tube
Thermo Scientific
TRACE 1300 and TRACE 1310 Hardware Manual
317
Replacing the FPD Photomultiplier Tube
Before replacing the FPD photomultiplier tube, read the following precautions:
To replace the photomultiplier tube
1. Put the GC in standby condition.
2. Switch off the flame. Hydrogen and air are automatically closed.
3. Cool the detector to room temperature.
4. Power off the GC.
a.
Push down the power switch (breaker), located at the back of the instrument, to the
position O.
b. Unplug the power cable from the AC Input connector into the back of the GC and
from the wall outlet.
5. If other external modules are present, unplug the power cable from the AC Input
connector of each module, and from the wall outlet.
6. Remove the FPD detector from the base.
a.
Disconnect the signal, excitation voltage, and ignition/heating cables from the
detector. See
.
WARNING
Carry out all the operations at low temperature to avoid burns. Therefore,
before beginning maintenance, cool the detector to room temperature.
CAUTION
The photomultiplier tube must be replaced only when defective.
Wear clean, lint- and powder-free gloves when you handle the photomultiplier tube.
Materials needed
FPD fixing tools
FPD Photomultiplier Tube
1-mm Allen wrench
Cross head screwdriver
Gloves
Note
By pressing the
Maintenance
button, the GC cool down is automatically
carried out.