Chapter:
Topic:
INSTALLATION
Detector Mounting Platforms on Column Oven Wall
,
,
,- - - - - - - - - - - - - - - - - - - - - - - - -)
Insulated
column
oven
lid
Fill
detector
beating block
Column oven lid
exhaust vent
Oven
lid
seals against oven wall
insulation
DELCD_
heating
block
and
detector gas supply lines •
Direct
on-column
injectioo
port
(septum
DUl
protruding
from """
front of oven)
o
Pill detector assembly shown
;r----~--_--'i.nstalled
ontowall-mounted
detector
beatiDg block
GAS FLOWRArES
RELAYFUNCTIONS
Space reserved for
" "'T-..::-__
.c
additional detector
'u__
0 ,.,D,","
A
...rr_I«'CMID_)
8
____ (.Il:D01I01.-_
installation
: ov
- 0 "' 0 """
c
_T(CIIT~
-
:: IOIDD,.,D·'....
0
___ cur,..)
•
~
- 0 ...·0·..·..
E
'U.__(OFnOll)
•
All 8610Cdetector
~~
-
- 0 ...·0 ·"·..
F
_11ClT(on'ICOll
inlets
are
equipped
•
-
•
~
0 ...·0 ·..·..
G
V....
w:..
l__
(l.~
with
detector
-
H
"'\'lO.'__
(l~
beating blocks
•
•
•
'"
(with
exception of
ECD
ODd
TCD
detectors)
•
Detector amplifier
controls
and
connections,
red
protective oven cover
not
shown for clarity of
this
illustration
RIGHT SIDE VIEWOF COLUMN OVENWITH DETECTORMOUNTING
HARDWARE VISmLE (p1D
DETECTOR
PRESENT)
All 86lOC gas chromatographs are equipped with a thermostatically-controlled heating block
mounted at the base (or inlet) of each detector. This new feature
permits
the user to preset the
temperature of the detector inlet. This is convenient for methods prescribing a specific detector
operating temperature, and ensures the temperature stability of each detector. Each detector heating
block temperature may be accessed from the "at-a-glance" display panel on the front of theGC for
viewing on the bright red, digital LED panel meter. The respective setpoint potentiometer, located
on the
top
control panel immediately forward of the column oven, is easily adjusted using a small
blade screwdriver. The TCD and ECD detectors, due
to
their enclosure in a temperature-controlled
detector oven, do not require a heating block. These two detectors are mounted directly to the
column oven
wall,
and the detector inlets and outlets are well-heated by the column oven.
The heated detector mounting blocks, or platforms, permit easy access
to,
and maintenanceof
the different detectors. The entire FID and DELCD detector assemblies may
be
removed for service
in
seconds. A new Pill detector cell and platform design mount horizontally onto a heating block
secured to the column oven, and the spring-loaded PID stage accepts compact 0-1 or Tracer-type PID
lamps (a lO.2 eV lamp is standard equipment on SRI Pill detectors).
A special electric heating cartridge is used
in
place of electrical heat ropes used on earlier
models. The cartridges in use for detector heating blocks should provide years of service before
requiring maintenance. The heating cartridge is installed
in
a well, drilled into the top of each cast
aluminum heating block, and cartridge servicing and replacement is simple
to
perform, should it
become necessary in the future.
D:\96EPI)(X::~0\861
OCRTI .EPD
REV. 05-08-96
