Micromeritics Gemini VII 2390a, Operator'S Manual

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Specifications Gemini VII
1-8 239-42828-01 - Dec 2012
Specifications
The analyzer has been designed and tested to meet the following specifications:
Characteristic Specification
Applicability
Surface Area:
From 0.1 m
2
, total

From 0.01 m
2
/g, specific
Pore Volume:
From 4 × 10
-6
cm
3
/g
Pressure Measurement
Pressure Measurement
Range: 0 to 950 mmHg
P/Po Resolution:
< 10
-4
Relative Pressure Range: 0 to 1.0 P/Po (adsorption only)
Pressure Resolution: < 0.1 mmHg
Accuracy and Linearity: Better than ± 0.5% (full scale)

(Transducer manufacturer’s specification)
Vacuum System
External:
Vacuum source achieving 20 × 10
-3
mmHg (or better) at the instrument
inlet for oil-based or oil-free pumps.
For
oil-based pumps
, an anti-suckback valve is required to prevent oil
from being admitted into the Gemini should there be a power failure. A
device to reduce oil vapor backstreaming is also recommended.
Environment
Temperature: 10 to 35 ºC (50 to 96 ºF) operating

0 to 50 ºC (32 to 122 ºF) non-operating
Humidity: 20% to 80% relative, non-condensing