Detectors
6850
6850
Released: April 2004 6850 Series Gas Chromatograph Service Procedures 168
4. Remove the two screws holding the upper
heated block onto the assembly. Carefully
lift the block over the anode lead and
remove.
5. Slide the heater and sensor out of the lower
heated block.
Makeup gas adapter
After removing the µECD detector from the GC,
you can further disassemble it to replace the
makeup gas adapter. The makeup gas adapter
consists of a line from the detector pneumatics
module that carries makeup gas to a weldment
that screws into the bottom of the µECD detec-
tor. From there, the makeup gas sweeps past the
end of the column and carries the column effluent
into the µECD cell.
1. Remove the detector as described in the
“Entire detector/detector cell” on
page 1-161.
2. Remove the Torx T-20 screw holding the
pneumatics block(s) to the detector module.
NOTE: There are two pneumatics blocks on the
EPC version of the µECD pneumatics module. The
outside block is the anode purge gas line and the
inside block is the make-up gas line.
3. Slide the makeup gas adapter up and out of
the GC.
4. When re-installing the makeup gas adapter,
ensure the following:
• Approximately 6 inches of the makeup
gas line resides in the oven after installa-
tion.
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