Getting Started
Teledyne API – Model T300/T300M CO Analyzer
66
3.3.2.10.
PNEUMATIC LAYOUT FOR ZERO SCRUBBER/ AMBIENT SPAN OPTION
INSTRUMENT CHASSIS
Flow / Pressure
Sensor PCA
SAMPLE
PRESSURE
SENSOR
FLOW
SENSOR
Sample Gas
Flow Control
SAMPLE
GAS INLET
EXHAUST
GAS OUTLET
Particulate
Filter
PUMP
ZERO AIR
INLET
SPAN1
INLET
VENT SPAN
OUTLET
Sample / Cal
Valve
Zero / Span
Valve
GFC Wheel
Housing
GFC Motor Heat
Sync
SAMPLE CHAMBER
ZERO Air
Scrubber
Zero
Gas
In
Sample
Gas
In
Span
Gas
In
Figure 3-28:
Internal Pneumatic Flow OPT 50H – Zero Scrubber/Ambient Span
Table 3-11: Zero/Span Valve Operating States for Option 50H
MODE
VALVE
CONDITION
SAMPLE
(Normal
State)
Sample/Cal
Open to SAMPLE inlet
Zero/Span
Open to ZERO AIR scrubber
ZERO CAL
Sample/Cal
Open to ZERO/SPAN valve
Zero/Span
Open to ZERO AIR scrubber
SPAN CAL
Sample/Cal
Open to ZERO/SPAN valve
Zero/Span
Open to PRESSURE SPAN inlet
3.3.2.11.
CALIBRATION GASES
Zero air and span gas are required for accurate calibration.
Z
ERO
A
IR
Zero air is a gas that is similar in chemical composition to the earth’s atmosphere but
scrubbed of all components that might affect the analyzer’s readings, in this case CO
and water vapor. If your analyzer is equipped with an Internal Zero Span (IZS) or an
external zero air scrubber option, it is capable of creating zero air.
If the analyzer is NOT equipped with the optional CO
2
sensor, zero air should be
scrubbed of CO
2
as well, as this gas can also have an interfering effect on CO
measurements.
06864D DCN7562
Summary of Contents for T300
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