Micromeritics Gemini VII 2390a, Operator'S Manual

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Calibrating the System Gemini VII
9-30 239-42828-01 - Dec 2012
If the BET Surface Areas match, click
Close
.
Calibrating the System
A calibration file was created specifically for your analyzer and included with your accessories. Refer
to
Reinstalling Calibration Files for an Analyzer
, page
4-24
. It is not necessary to recalibrate the
system unless you suspect it is out of calibration. Certain calibrations are not allowed unless performed
under the direction of a Micromeritics service representative. Those calibrations are greyed out on the
Calibration menu.
To review calibration details of the analyzer, go to
Unit [n] > Unit Configuration.
The following calibrations can be performed without the assistance of a service representative:
• Zero pressure
• Match transducers
• Servo valve
Zero Pressure
Use this option to evacuate the system and zero the transducers.
1. Install a blank sample tube on each applicable port.
2. Go to
Unit [n] > Calibration > Zero Pressure.
3. Ensure that all transducers are selected, then click
Start
. The window closes when the operation is
complete.
The measured free space is too high. This
indicates the helium is not pure enough. Use helium that is 99.999% pure, then try again.
Cause Action (continued)