Emerson Daniel Danalyzer 1000, Hardware Reference Manual

Page: 257 / 320

MODEL 1000
SEP 2005
SETTING SOLENOID PURGE FLOWS
E-1
APPENDIX E
SETTING SOLENOID PURGE FLOWS
This appendix provides the steps needed to set up solenoid purge flow. Solenoid purge flow is a
necessary part of the normal operation of
process GC systems that handle multiple streams and are
equipped with optional solenoid purge system components.
A solenoid purge system for the GC is available as an optional part of the GC sample
conditioning system (SCS). The utility of a solenoid purge system is greatest for GC systems
with multiple streams in which the makeup of the different analysis streams may differ
significantly from stream to stream.
For process GC systems with multiple streams, a solenoid purge setup is necessary before starting
normal GC operation. A solenoid purge check, as outlined below, is also recommended as part of
a regular GC system maintenance schedule to be performed, for example, once every month.
The steps in this solenoid purge procedure ensure there is no cross stream contamination in multi-
stream sample systems. As a particular stream is being purged through the sample valve in the
Analyzer, that same stream is being purged through all the sample system solenoids. This ensures
that streams not being purged do not mix with the purging stream.