Calibrating The System; Zero Pressure - Micromeritics Gemini VII 2390a Operator's Manual

Calibrating the System

The measured free space is too high. This
indicates the helium is not pure enough.
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
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.
9-30
Cause
Analyzer, page 4-24. It is not necessary to recalibrate the
Action (continued)
Use helium that is 99.999% pure, then try again.
Gemini VII
239-42828-01 - Dec 2012