Micromeritics Gemini VII 2390a, Operator'S Manual

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Field or Button Description
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Smart VacPrep Evac-
uation This option is applicable only when degassing with a Smart VacPrep.
l
Backfill sample tube. Indicate if the sample tube should be backfilled
automatically or wait for operator response.
l
Evacuation Rate. Rate used for evacuation.
l
Unrestricted evac. from. Pressure at which the unrestricted evac-
uation is to begin.
l
Vacuum level. Pressure for unrestricted evacuation.
l
Evacuation time. Length of time for preliminary evacuation before
proceeding with the Heating Phase temperature schedule. The timer
starts when the vacuum level is reached.
l
Temperature ramp rate. Rate at which the temperature is to change
when advancing to the target pressure.
l
Target temperature. Targeted pressure for evacuation.
l
Hold pressure.
Pressure at which heating will stop and hold the
sample temperature approximately constant until the pressure falls
below the
Hold pressure. This prevents damage to the sample struc-
ture due to 'steaming' and /or elutriation due to excessive escaping gas
velocity.
Degas Conditions Fields and Buttons Table (continued)
S
TART
S
MART
V
AC
P
REP
D
EGAS
Smart VacPrep > Unit [n] > Start Degas
This option allows the degassing of up to six samples simultaneously. A sample can be added to any idle
port and a degas operation started. When adding a sample, the degas operation in progress will be
suspended until the sample reaches the target pressure, then degassing on all ports will resume. If other
samples are still in the initial evacuation phase, the new samples will wait until the fast evacuation is
started. Samples can be removed from any of the six ports without disturbing the degas operations
already in process. Starting several samples as a batch allows them to perform the initial evacuation at
the same time.
Start Smart VacPrep Degas
Smart VacPrep Operator Manual 3 - 5