User guide

Flow and Pressure Modules 7
Advanced User Guide 155
PIDs
The behavior of a pressure control module is governed by a set
of three constants, called P (proportional), I (integral), and D
(differential).
Certain gases or special applications (such as QuickSwap,
headspace vial pressurization, or splitter and backflush
applications) require different PIDs than those provided at the
factory.
If you need to update or change the pneumatic PID values for an
application, use the utility program on the documentation and
utility DVD provided with the GC.
The table summarizes custom PID values required for selected
applications. Note that if you are updating an AUX EPC module,
you will need to change the frit for the channel used.
Table 23 PIDs and frits
Application Module AUX frit Select Available PID
Values
QuickSwap AUX EPC Brown, 1 ring Quickswap
Purged splitter and Deans Switch
when using backflush
AUX EPC No color or rings Quickswap
Purged splitter and Deans Switch AUX EPC Brown, 1 ring Standard
Headspace vial pressurization AUX EPC No color or rings AUX_EPC_Headspace
Headspace sampling loop PCM in backpressure
control
PCM_Headspace