Agilent Technologies Agilent 7890 Series, Maintenance Manual

Page: 256 / 354

256 Maintaining Your GC
13
Maintaining the uECD
To Bakeout the uECD
1
Gather the following:
• Column nut and no- hole ferrule (See “Consumables
and Parts for the uECD” on page 244.)
• Blanking nut with any column ferrule
2 With the detector and oven at normal operating
temperatures, show the detector output. Press
[Front Det]
or
[Back Det]
. Note the value of
Output
for later
comparison.
3
Load the GC maintenance method and wait for the GC to
become ready.
4
If the column maximum temperature is < 250 °C, remove
the column from the detector.
WA R N I N G
Detector disassembly and/or cleaning procedures other than
thermal should be performed only by personnel trained and
licensed appropriately to handle radioactive materials. Trace
amounts of radioactive
63
Ni may be removed during other
procedures, causing possible hazardous exposure to b- and
x-radiation.
C A U T I O N
To prevent possible hazardous contamination of the area with
radioactive material, the detector exhaust vent always must be
connected to a fume hood or otherwise vented in compliance with
the latest revision of 10 CFR Part 20, or with state regulations with
which the Nuclear Regulatory Commission has entered into an
agreement (USA only). For other countries, consult with the
appropriate agency for equivalent requirements.
WA R N I N G
Be careful! The oven and/or detector may be hot enough to cause
burns. If the detector is hot, wear gloves to protect your hands.
WA R N I N G
Wear safety glasses to protect your eyes from flying particles
while handling, cutting, or installing glass or fused silica capillary
columns. Use care in handling these columns to prevent puncture
wounds.