The Model 302 data
system is for analysts who prefer the hot-swappable, plug-and-play capabilities
of Universal Serial Bus devices. The Model 302 can be mounted inside the
8610C, 8610D, 410,
or 310 GCs and the 210D
HPLC, or it can be mounted in a separate box for connection to other
manufacturers' GC or HPLC detectors. The Model 302 data system consists
of PeakSimple chromatography software for Windows,
and a six channel, 24-bit high resolution A/D board.
When mounted in an
SRI GC, the Model 302 controls the column oven
temperature program, and the pressure
program of the carrier gas electronic pressure controller (EPC). When
mounted in the 210D HPLC system, the Model 302 controls the pump speed
and gradient profile. The eight available TTL outputs are connected internally
within the GC or HPLC to control functions like valve rotation, gas solenoid
actuation, autosampler injection, etc.
When mounted in a
separate box, the temperature, pressure, and gradient control outputs
are available for use, but not connected to anything. The eight TTL outputs
are wired to a bank of eight single-pole, dual-throw mechanical relays
with screw terminals for easy connection to any user device which operates
from a contact closure. Four remote start inputs allow run initiation
from the user's GC or HPLC system.
Each of the six channels
of data can be randomly assigned to one of four time bases, which allows
independent start and stop times for four separate instruments. Data can
be acquired at rates up to 50Hz per channel for one or two channels, or
20Hz for all six channels. The Model 302 is for use with Windows computers
that have USB 2.0 ports (manufactured in 1998 or later).
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