Teledyne 6200T - Sulfides Analyzer - Manual (Page 298)

Principles of Operation Model 6200T Total Sulfur Analyzer
298 Teledyne Analytical Instruments
13.3.2. CO
2
Operation within the 6200T Analyzer
The CO2 sensor option is transparently integrated into the core analyzer operation. All
functions can be viewed or accessed through the front panel display, just like the
functions for SO
2
.
 The CO
2
concentration is displayed below the SO
2
concentration.
 Test functions for CO
2
slope and offset are viewable from the front panel
along with the other test functions of the analyzer.
 CO
2
sensor calibration is performed via the front panel CAL function and is
performed in a nearly identical manner as the standard SO
2
calibration.
 Stability of the CO
2
sensor can be viewed via the front panel (refer to
Section 9.10.2.3).
Refer to Section 3.4.4.3 for information on calibrating the CO
2
.
13.3.3. Electronic Operation of the CO
2
Sensor
The CO
2
PCA, which is mounted to the rear side of the Relay Board Mounting Bracket,
controls the CO
2
sensor. It converts the sensor’s digital output to an analog voltage that
is measured with the motherboard and draws 12 VDC from the analyzer via the relay
card from which converts to fit the power needs of the probe and its own onboard logic.
It outputs a 0-5 VDC analog signal to the analyzer’s CPU via the motherboard that
corresponds to the concentration of CO
2
measured by the probe.
Figure 13-9: CO2 Sensor Option PCA Layout and Electronic Connections