Option Description
VacPrep
The VacPrep offers two methods for removing contaminants. In addi-
tion to flowing gas, it provides vacuum to prepare samples by heating
and evacuation of up to six samples. This combination provides pre-
paration method options best suited to the material or application.
Needle valves are also provided for introducing the vacuum slowly to
prevent fluidization of samples. The VacPrep is an independent unit
and not controlled by the analyzer.
Vacuum Pump
The analyzer requires a vacuum pump for sample analysis. Vacuum
pumps used must meet the following criteria:
n
Achieve vacuum levels of 20μmHg at the analyzer inlet
n
Contain an anti-suckback valve to prevent vacuum pump oil from
back streaming into the analyzer in the event of a vacuum pump
failure
n
Contain an NW16 inlet port for connection to the analyzer
A device to reduce oil vapor backstreaming is recom-
mended.
The vacuum pump must have an anti-suckback valve to
prevent oil from being admitted into the analyzer should
the power fail while the system is under vacuum. Pumps
available from Micromeritics are equipped with an anti-
suckback valve.
An oil-based or oil-free vacuum pump can be used with the analyzer
(an oil-free pump is required if the krypton option is installed).
Appropriate vacuum pumps are available from Micromeritics.
Equipment Options and Upgrades
TriStar II Plus Operator Manual
303-42800-01 (Rev M ) — Sep 2023
1 - 5
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