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Getting Started Teledyne API – Model T400 Photometric Ozone Analyzer
56
COM1 port must be set at the same baud rate in all instruments in the multidrop
chain.
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 disables the USB port. To reconfigure this port for
RS-485 communication, please contact the factory.
3.3.2. PNENUMATIC CONNECTIONS
This section provides not only pneumatic connection information, but also important
information about the gases required for accurate calibration (Section 3.3.2.1); it also
illustrates the pneumatic la
youts for the analyzer in its basic configuration and with
options.
Before making the pneumatic connections, carefully note the following cautionary and
special messages:
CAUTION! GENERAL SAFETY HAZARD
OZONE (O
3
) IS A TOXIC GAS.
Obtain a Material Safety Data Sheet (MSDS) for this material. Read and
rigorously follow the safety guidelines described there.
Do not vent calibration gas and sample gas into enclosed areas
Sample and calibration gases should only come into contact with PTFE, FEP or
glass.
CAUTION!
Do not operate this instrument until removing dust plugs from SAMPLE and
EXHAUST ports on the rear panel!
CAUTION! GENERAL SAFETY HAZARD
Venting should be outside the shelter or immediate area surrounding the
instrument and conform to all safety requirements regarding exposure to O
3
.
3.3.2.1. About Zero Air and Calibration Gas
Zero air and span gas are required for accurate calibration.
ZERO AIR
Zero air is similar in chemical composition to the Earth’s atmosphere but scrubbed of all
components that might affect the analyzer’s readings. If your analyzer is equipped with
06870C DCN6332