9300025700: Rev. A
11
of 14
Pre-installation Instructions
Qualified Computer Equipment
If the Varian MS Workstation software is to be installed on a computer not purchased
from Varian, the customer is responsible to ensure that the computer is adequately
equipped and compatible with the operation of the data system and its communication
interfaces. Please check the current list of requirements, available at the following web
site.
Varian does not guarantee the function of the Varian MS Workstation software on
computer hardware or operating systems that do not meet the specified requirements.
NOTE: Contact your Sales Representative for a list of qualified equipment or for more
information.
Gas Requirements
Nitrogen
A nitrogen gas supply that can provide up to a maximum of 12 L/min of gas regulated at 80 psi
is sufficient for ESI or APCI operation for one LC/MS. If there is more than one LC/MS, use a
nitrogen supply that can deliver a maximum of 18 L/min. The nitrogen must be at least 99%
pure with less than 0.1 ppm hydrocarbons and less than 1% oxygen. It must be clean and dry
with a
−
40 °C
dew point. Use a nitrogen generator, or a liquid nitrogen boil-off to supply the
nitrogen gas. All nitrogen generators require regular maintenance. The customer is responsible
for setting up the preventive maintenance procedures and schedules (contact the nitrogen
generator manufacturer). The Varian Warranty does not cover any MS problems caused by
poor gas quality. It is the responsibility of the customer to conform to all regulations regarding
the installation and operation of the gas system. The nitrogen supply uses ¼ in. connectors
.
;
Check the checklist box: Nitrogen gas (at least 99% pure), regulator, and gas
lines are installed.
Air
A compressed air gas supply, capable of providing up to 3 L/min of gas regulated to 80 psi with
a two-stage regulator, is required as a nebulizing gas for negative ESI. The customer is
responsible to conform to all regulations for the installation and operation of the gas system.
The air must be clean and dry, with less than 0.1 ppm total hydrocarbons, including methane,
and have a
−
40 °C dew point. The air supply uses ¼ in. connectors.
;
Check the checklist box: Air (less than 0.1 ppm hydrocarbons), regulator, and
gas lines are installed.
CID Gas (triple quadrupole only)
Argon is required as collision gas for MS/MS work with triple quadrupole instruments. The
argon supply uses 1/8 in. connectors. Use a two-stage 0-100 psi pressure regulator with a
stainless steel diaphragm. The purity of the argon must be greater than 99.0%.
;
Check the checklist box: Argon (greater than 99.0% pure), regulator, and gas
lines are installed. Argon required only for triple quadrupole instruments.
