Flowsorb Iii 2310 - Micromeritics FlowSorb III 2305 Operator's Manual

FlowSorb III
Special sample tubes such as those having ground glass joints must be
warmed with care as they are more subject to stress development which can
lead to breakage.
5. Continue the warming procedure until the flowmeter float returns to its nor-
mal level.
•
As with adsorption, the Threshold light flashes and the display accumu-
lates data for several minutes.
•
When the flashing ceases to no more than once every 15 to 20 seconds
(or the Det indicator has returned to 0.02 or less), the sample surface area
is displayed.
6. Record this value along with sample descriptive information and weight.
This number divided by the sample weight in grams is the sample specific
surface area in square meters per gram.

FlowSorb III 2310

1. Place the Dewar on the Dewar tray.
2. Depress the Start button.
•
The Dewar rises about the sample and analysis begins.
.
•
Observe the flowmeter float; ensure that it returns to its normal position
before data accumulation begins (indicated by the flashing of the Thresh-
old light). If the float does not return to its normal position, depress the
Reset button to abort the analysis. Then repeat the test using the Long
Path or a lesser quantity of sample.
•
The Threshold light begins to flash indicating data accumulation has be-
gun. After approximately one minute (five minutes for the Long path),
data accumulation is shown on the instrument display. The values shown
will be negative numbers; do not be concerned. The surface area number
derived from the subsequent desorption operation will display as a positive
value.
•
The Dewar tray lowers automatically and a warming fan is activated to
bring the sample to room temperature.
•
After the sample has warmed to room temperature, desorption begins (indi-
cated by the flashing of the Threshold light).
•
When the flashing ceases to no more than once every 15 to 20 seconds
(approximately three or four per minute), or the indication with Det de-
pressed has returned to 0.02 or less, desorption is complete.
Mar 2012
Performing a Single-Point Surface Area Measurement
3-9