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2. UNITY 2 Pre-installation Check List
2.1
Minimum computer specification for UNITY 2 control
UNITY 2 software will run on most 32 and 64-bit versions of Windows®. However, use of currently
supported versions of Windows is strongly recommended.
The minimum PC specifications are:
CPU
400 MHz Pentium (or equivalent)
RAM
64 MB
Free Disk Space
20 MB (for installation)
Minimum resolution
XGA (1024 x 768 pixel)
Other requirements
Windows compatible mouse, and one free serial or USB port*
2.2
GC equipment requirements
UNITY 2 is usually connected to a gas chromatograph configured with appropriate conventional or mass
spectrometer (MS) detectors. No conventional GC injector is required for UNITY 2 operation. Ready and
external start connections are required on the GC.
2.2.1
Access into the GC oven
The UNITY 2 heated transfer line is lined with 0.25 mm I.D., 0.35 mm O.D. uncoated deactivated fused
silica which butt connects with the capillary analytical column inside your GC oven.
It is important that the heated and insulated portion of the transfer line extends as far as the skin of the
GC oven such that the GC oven heating begins at the point where heating of the transfer line ends. A 25
mm diameter access hole is thus required into the GC, with a 6.5 mm hole in the GC inner oven wall.
Further information is provided in Section 3.1.
2.2.2
GC configuration/parameter selection
From a GC perspective, UNITY 2 may simply be regarded as a multipurpose, stand alone GC injector for
capillary or 1/8 inch packed columns. No conventional GC injector is required for UNITY 2 operation. The
rest of the GC system - column, oven, data handling, detector, etc. - should be configured and used, as per
normal chromatographic practice for the analytes of interest.
If multiple applications are to be carried out or if samples are uncharacterised; for example when
monitoring unknown atmospheres, a good general purpose GC configuration comprises 25-30 m, 0.25mm
or 0.32 mm ID, 1 or 2 µm phase thickness bonded methyl silicone capillary column with a FID or mass
spectrometer detector.
2.3
Laboratory location
2.3.1
Space requirements
UNITY 2 can sit either side of the gas chromatograph.
Efficient cold trap cooling requires at least a 10 cm gap on both sides of UNITY 2
Markes International Ltd
T: +44 (0)1443 230935 F: +44 (0)1443 231531 E: enquiries@markes.com
www.markes.com
QUI-1056
Page 8
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