7
Detectors Advanced Maintenance
Cleaning or Replacing the NPD Jet
Thermo Scientific
TRACE 1300 and TRACE 1310 Hardware Manual
285
Cleaning or Replacing the NPD Jet
You should cleaning the jet semiannually when you analyze particularly dirty compounds that
the flame does not burnt properly. In case of breakage or cracking, the jet must be replaced.
To clean or replace the NPD jet
1. Put the GC in standby condition.
2. Switch off the thermionic source. Hydrogen and air are automatically closed.
3. Cool the detector to room temperature.
4. Turn the make-up gas off.
5. 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.
6. Unplug the power cable from the AC input connector of the
NPD
Thermionic Source
Power Module
and from the wall outlet.
If other external modules are present, unplug the power cable from the AC Input
connector of each module, and from the wall outlet.
7. If present, move the autosampler away from the module.
8. Unplug the signal cable from the detector module. See
.
Materials needed
Ultrasonic cleaner
Liquid detergent
GC-grade methanol
Distilled water
Forceps or tweezers
T6 Torxhead key
T10 Torxhead screwdriver
6 mm wrench
Elbowed box wrench, 8-mm
Jet (if necessary)
Note
By pressing the
Maintenance
button, the GC cool down is automatically
carried out.