Reagent Gas Flow Control Module - HP 5973 MSD Hardware Manual

 Hardware Reference
5HDJHQW JDV IORZ FRQWURO PRGXOH

Reagent gas flow control module

The CI reagent gas flow control module regulates the flow of reagent gas into the
EI/CI GC/MSD interface. The flow control module consists of a mass flow controller
(MFC), gas select valves, CI calibration valve, isolation valve, control panel, control
and display electronics, and plumbing. The back panel provides Swagelok inlet
fittings for methane and one other reagent gas. The other fittings in the flow module
are VCR fittings; VCR fittings have a disposable gasket that must be replaced every
time the seal is opened. Operation of the flow module is through the control panel
on the front.
other reagent gas.
Operation of the flow module is through the control panel on the front.
Flow control knob
Flow control display
• Each button on the control pane has an LED (light) next to it. When that button
•
•
• The flow control knob is used to adjust the flow. When no gases are turned on
•
16
Gas A must be plumbed with Methane.
is active, the light is on.
or opens the chosen gas select valve. Only one can be open at a time.
Gas A Gas B
Gas Off closes the gas select and isolation valves.
flow, unless Purge is on. The
the Flow Control display will show dashes: ––.
sets the MFC to 100% of total flow (fully open), regardless of the position
Purge
of the flow control knob or the state of the select valves.
Gas B
Gas Off
Gas Off LED must be off to turn on
can be plumbed with any
also sets the MFC to 0%
Gas A or Gas B