Thermo Scientific TRACE 1600 Hardware Manual page 193

Thermo Scientific
Note The thermionic source is supplied by a separated NPD Thermionic Source Power
Module placed into an external module housing on the back of the GC.
The NPD detector periodic maintenance includes:
• Replacing the thermionic source
New thermionic sources may require slightly different values of source heating current to
produce the same signal observed with a previous thermionic source.
See "Replacing the NPD Thermionic Source"
• Cleaning the collecting electrode
We suggest cleaning the collecting electrode semiannually, or when a high noise baseline
is found, due to some compounds that produce detector contamination. If necessary,
replace the collecting electrode.
See "Cleaning or Replacing the NPD Collecting Electrode"
Before maintaining the detector, read the following precautions:
WARNING Carry out all the operations at low temperature to avoid burns. Therefore,
before beginning maintenance, cool the detector to room temperature.
CAUTION When handling organic solvents, you must take precautions to avoid health
hazards.
ATTENTION Pendant la manipulation de solvants organiques, prenez les mesures
nécessaires pour éviter tout risque sanitaire.
Materials needed to maintain a NPD detector
Thermionic Source
Gloves
Ultrasonic cleaner
Liquid detergent
GC-grade methanol
Distilled water
Collecting electrode (if necessary)
Forceps or tweezers
T6 Torxhead key
4
Performing Detectors Routine Maintenance
Maintaining a Nitrogen Phosphorous Detector (NPD)
on page 162.
on page 169.
TRACE 1600/1610 Hardware Manual 161