Varian Micro-GC 490-GC, User Manual

Page: 18 / 83

Introduction and Initial Operation
Page 10 User Manual Micro-GC Varian, Inc.
INSTALLATION
Install Gas Regulators and Set pressures
Carrier gas supplied from cylinders should have a two-stage pressure assembly to
adjust the carrier gas pressure to 550 ± 10 % (80 ± 10 %). Set cylinder regulator
pressure to match the Micro-GC gas inlet pressure
(see
Carrier_gas_connection on page 15 ).
Carrier gas
The most commonly used carrier gas for the Micro-GC is either He or N
2
. The
recommended purity for carrier gas is 99.995% minimum.
See
Carrier_gas_connection on page 15
Connect data handling peripherals
The Micro-GC must be connected to an external Workstation , on page 47 both to set up
the method and to acquire data.
Workstations and other data handling devices are connected to the cable connectors
inside the Micro-GC (see
Cable_connectors on page 14 for more details).

Hardware connection between the Micro-GC and Workstation (computer) is done
by Ethernet connection. For additional information look here Cable_connectors on
page 14.
Sample
Connect the sample to the using the sample-in connector situated at the front of the
instrument ( see front view on page 12 ).
Read chapter Sample Gas on page 16 for more important information!
Heated Sample line
To connect heated sample lines refer to Heated Sample line chapter on page
18 .