083730300A DCN8101 Calibration 101
4.6.2 CO
2
SENSOR CALIBRATION PROCEDURE
Set up the CO
2
pneumatics connections as follows:
Calibrated N
2
at HIGH Span
Concentration
Calibrated CO
2
at 16% Span
Concentration
Source of
SAMPLE GAS
Removed during
calibration
SAMPLE
EXHAUST
PUMP
VENT
3-way
Valve
Manual
Control Valve
VENT
here if input
is pressurized
Instrument
Chassis
Figure 4-5. CO
2
Sensor Calibration Set Up
CO
2
SENSOR ZERO GAS: Teledyne API recommends using pure N
2
when calibration
the zero point of your CO
2
sensor option.
CO
2
SENSOR SPAN GAS: Teledyne API recommends using 16% CO
2
in N
2
when
calibration the span point of your CO
2
sensor option (Table 2-6) is 20%.
In the Calibration>CO2 menu, follow the steps in Section 4.2.1.2, this time setting the
expected CO
2
span gas concentration. This should be equal to the percent concentration
of the CO
2
span gas of the selected reporting range (default factory setting = 12%).
4.7 EPA PROTOCOL CALIBRATION
When running the T300 for U.S. EPA compliance (the T300M does not have an EPA
designation), always calibrate prior to use, adhering to the EPA designation requirements
for this instrument. (The official List of Designated Reference and Equivalent Methods is
published in the U.S. Federal Register: http://www3.epa.gov/ttn/amtic/criteria.html; this
List specifies the settings and configurations for EPA calibration protocol). Pay strict
attention to the built-in warning features, periodic inspection, regular zero/span checks,
regular test parameter evaluation for predictive diagnostics and data analysis, and routine
maintenance. Any instrument(s) supplying the zero air and span calibration gasses used
must themselves be calibrated, and that calibration must be traceable to an EPA/NIST
primary standard.
Comply with Code of Federal Regulations, Title 40 (downloadable from the U.S.
Government Publishing Office at http://www.gpo.gov/fdsys/) and with Quality Assurance
Guidance documents (available on the EPA website:
http://www3.epa.gov/ttn/amtic/qalist.html). Give special attention to specific regulations
regarding the use and operation of ambient carbon monoxide analyzers (gas filter
correlation).
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