Internal/External Plumbing: Tcd Without Epc; Internal/External Plumbing: Ecd Without Epc - Agilent Technologies 6890 Series Operating Manual

Flow and Pressure Control
Detectors

Internal/external plumbing: TCD without EPC

This detector has two internal pressure regulators, one for reference gas and
one for makeup gas, that are supplied from a single fitting. The pressure
regulators are located behind the detector positions.
Reference and
make up in
Figure 13 TCD without EPC
See the Detectors volume for flow rate details.

Internal/external plumbing: ECD without EPC

This detector has an internal pressure regulator that supplies both the anode
purge gas and the makeup gas. The pressure regulator is located behind the
detector positions.
74
EXTERNAL INTERNAL
pressure pressure
regulators regulators
6890 GC
Keyboard-controlled
On/off solenoid
valves Restrictors
Part 2. NonEPC control
TCD
Reference
switching
valve
Makeup flow