Getting Started Teledyne API T801 NDIR CO2 Analyzer Operation Manual
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RS-485 CONNECTION
As delivered from the factory, COM2 is configured for RS-232 communications.
This port can be reconfigured for operation as a non-isolated, half-duplex RS-485
port. Using COM2 for RS-485 communication will disable the USB port. To
reconfigure this port for RS-485 communication, please contact the factory.
3.3.2. PNEUMATIC CONNECTIONS
This section presents information about gases and pneumatic connections.
CAUTION
GENERAL SAFETY HAZARD: CO
2
While CO
2
itself is not toxic, in sufficient concentrations it can be an irritant and
an asphyxiant.
Obtain a Material Safety Data Sheet for CO
2
and any other hazardous components
of sample and calibration gases, and follow the prescribed safety guidelines.
Do not vent sample gases into the immediate vicinity of the analyzer nor into any
enclosed areas.
3.3.2.1. CALIBRATION GASES
ZERO GAS
Zero gas is similar in chemical composition to the earth’s atmosphere but
scrubbed of all components that might affect the analyzer’s readings. Teledyne
API recommends using pure N
2
when calibrating the zero point of your CO
2
sensor.
CAUTION
GENERAL SAFETY HAZARD
Rapid release of pure N
2
gas into an enclosed space can displace oxygen, and
therefore represents an asphyxiation hazard. This may happen with few
warning symptoms.
Do not vent calibration gases into enclosed areas.
SPAN GAS
Span gas is specifically mixed to match the chemical composition of the type of
gas being measured at near full scale of the desired measurement range. Teledyne
API recommends the following when calibrating the span point of the CO
2
sensor:
16% CO
2
in N
2
Cylinders of calibrated gas traceable to NIST-Standard Reference Material
specifications (also referred to as SRMs or EPA protocol calibration gases) are
commercially available.
