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1. INTRODUCTION
The Models T360 and T360M differ only in specifications; unless clearly
differentiated, both models in this manual are referred to as the T360 for
simplification. The T360/T360M measures carbon dioxide CO
2
by comparing
infrared energy absorbed by a sample to that absorbed by a reference according to
the Beer-Lambert law. This is accomplished by using a Gas Filter Wheel which
alternately allows a high energy infrared (IR) light source to pass through a CO
2
filled chamber and a chamber with no CO
2
present.
The IR light then travels through the sample cell, which has a folded path. Energy
loss through the sample cell is compared with the zero reference signal provided
by the gas filter to produce an output proportional to concentration, with little effect from
interfering gases within the sample. A nitrogen purge system is pro-vided for the
GFC wheel assembly to eliminate the effects of ambient CO
2
, if necessary.
This design produces superior zero and span stability and a high signal-to-noise
ratio, allowing excellent sensitivity. Multi-tasking software gives real time
indication of numerous operating parameters and provides automatic alarms if
diagnostic limits are exceeded.
1.1. FEATURES
The Models T360 and T360M include the following features:
Ranges,T360: 0-2 ppm to 0-2000 ppm, T360M: 0-4 ppm to 0-4000 ppm, user
selectable
Gas Filter Wheel for CO2 specific measurement
LCD Graphical User Interface with capacitive touch screen
Multi-tasking software allows viewing of test variables during operation
Continuous self checking with alarms
Bi-directional RS-232 and 10/100Base-T Ethernet (optional USB and RS-
485) ports for remote operation
Front panel USB ports for peripheral devices
Digital status outputs to indicate instrument operating condition
Adaptive signal filtering to optimize response time
Temperature & Pressure compensation
Internal data logging with 1 min to 24 hour averages
1.2. USING THIS MANUAL
The flowcharts in this manual contain typical representations of the analyzer’s
display during the various operations being described. These representations are
not intended to be exact and may differ slightly from the actual display of your
instrument.
07272B DCN6552