Commissioning and shutting down
COMMISSIONING
Carry out all operations in the sequence listed in
these instructions to prevent damage to the chro-
matograph.
CAUTION
Carry out all operations in the sequence
listed in these instructions to prevent dam-
age to the chromatograph.
Connection of gases
Check that all gas lines correspond to the piping
diagram and that all gases and gas lines are clean
Purge the gas lines again under high pressure
Remove dummy plugs from the gas inlets and out-
lets on the chromatograph
Connect the gas lines according to the piping diag-
ram
Adjustment of gases
Open up the gases in the following order: control
air, carrier gas, combustion gas, combustion air,
purging N
2
(ECD) and, if applicable, protective gas
or purging gas
For classified
PGC 302
only:
Protective gas for classification
Check that the gas pressure corresponds to the rating
plate
WARNING
Observe the explosion protection
regulations if you are commissioning a
classified chromatograph!
Carrier gas,
FID/FPD combustion gas, ECD purging gas
Adjust the pressure on the fine pressure regulator in
the chromatograph according to the application data
Measure the carrier gas pressure and flow at the
outputs detector, backflushing, cut and exhaust. The
measured values should approximately correspond
to the application data. Because the chromatograph
is cold, the measured flows should be larger than
the application data.
Switching on the chromatograph
Switch on the mains switch.
NOTE: PGC 302
The PGC 302 doesn’t have a mains switch. We recommend an
external master switch. The power supply for the classified
PGC 302 for division 1 is connected via a safety monitoring
unit. Refer to
Purging the electronics area
.
WARNING: Danger of explosion
Hydrogen and air can form an explosive
mixture. If you switch on the FID
all gas pipes must be airtight
the column must be connected
the exhaust gas outlet must not be
closed.
CAUTION withTCD
The filaments can burn out if you subject the
TCD to improper use. Never operate the
TCD without gases.
WARNING for ECD
The ECD must never be heated without
nitrogen purging. Do not switch on the
chromatograph until purging is guaranteed.
Commissioning and shutting down
2
4INBETR.CHP, Stand Dezember 22, 1999
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