Specifications for the Gemini VII

Analysis
Surface Area

From 0.1 m2/g, total
From 0.01 m2/g, specific

Pore Volume

From 4 × 10-6 cm3/g

Electrical
Frequency 50/60Hz
Power 50VA
Voltage 100-240VAC
Overvoltage Category II
Environment
Humidity 20% relative, non-condensing
Temperature

10 °C to 35 °C (50 °F to 95 °F), operating
0 °C to 50 °C (32 °F to 122 °F), non-operating

Indoor/Outdoor Use Indoor only (not suitable for wet locations)
Altitude: 2000 m max
Pollution degree of the intended environment: 2
Degree of Ingress
Protection
IPX0
Gases
Adsorbate Optimized for nitrogen in a liquid nitrogen sample bath. Gemini may be used with non-corrosive adsorbate gases having vapor pressures at both room and bath temperatures that are acceptably high relative to the resolution of the 1,000 mmHg pressure transducer. Typically, oxygen, argon, carbon dioxide, butane, methane, and other light hydrocarbons will produce useful data above absolute pressures of a few mmHg.
Physical
Height

59 cm (23 in.) - Gemini VII 2390a and 2390p
74 cm (29 in.) - Gemini VII 2390t

Width 40 cm (16 in.)
Depth 51 cm (20 in.)
Weight 32 kg (75 lbs.) - Gemini VII 2390a and 2390p
35 kg (78 lbs.) - Gemini 2390t
Pressure Measurement
Range 0 to 950 mmHg
P/P0 Resolution <10-4
Relative Pressure Range 0 to 1.0 P/P0
Pressure Resolution <0.1 mmHg
Accuracy and Linearity
(transducer manufacturer
specification)
Better than ± 0.5% full scale
Sample Tube and Dewar
Standard Tube
  • Gemini VII 2390a and 2390p. 0.95 cm (3/8 in.) OD, 15.5 cm (6.1 in.) long with 6.5 cm3 of volume. Sample capacity is approximately 2.0 cm3.
  • Gemini VII 2390t. 0.95 cm (3/8 in.) OD × 20.5 cm (8.1 in.) long with 8.9 cm3 of volume. Sample capacity is approximately 2.0 cm3.
Dewar
  • Gemini VII 2390a and 2390p. 8 hours
  • Gemini VII 2390t. >24 hours
Vacuum System

An 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 analyzer should there be a power failure. A device to reduce oil vapor backstreaming is also recommended.

Computer Requirements

Operating System 32- bit Windows 7 Professional or higher operating system is recommended for the best user experience. For 21 CFR Part 11 environments, Windows 10 Professional or Windows 10 Enterprise or higher is required.
Desktop Installation Required The application should not be installed on a network drive with shared access. Multiple users cannot operate the application at the same time.
10 Base T or 100 Base T Ethernet Port If the computer is to be connected to a network, two Ethernet ports are required. If more than one Ethernet based unit is connected to the same computer, an Ethernet switch will also be required. If a Smart VacPrep is to be used, an Ethernet switch is required.
Read/Write Permissions All users of the application will need Read/Write permission to all directories and subdirectories where the application is installed. For 21 CFR Part 11 environments, permission may be limited to the installation directory.
Drives USB port

Due to continuous improvements, specifications are subject to change without notice.