Teledyne 7320 - NDIR analyzer User Manual
Page 26
2 Installation
Model 7320
2-12
Teledyne Analytical Instruments
st
Toggling input. Stops/Starts any status message output from
the RS-232, until st
Implementation: The RS-232 protocol allows some flexibility in its
implementation. Table 2-4 lists certain RS-232 values that are required by
the Model 7320 implementation.
Table 2-4: Required RS-232 Options
Parameter
Setting
Baud
2400
Byte
8 bits
Parity
none
Stop Bits
1
Message Interval
2 seconds
2.4
Gas Requirements
Instrument Air is required for zeroing of the Infrared Analyzer. It must
be free of oil, particulates and water vapor (that will not condensate,
unfiltered plant air is not recommended). A supply pressure of 10-50psig
with a typical flow rate of 0.1 to 0.6 SCFH (50-250 cc/min) is needed.
Bottled gas is recommended (air or Nitrogen) if high quality air is not avail-
able.
For accurate calibration, the analyzer requires blended gas mixtures
certified to +/- 2% accuracy.
2.5
Testing the System
Before plugging the instrument into the power source:
•
Check the integrity and accuracy of the fluid connections. Make
sure there are no leaks.
•
Check the integrity and accuracy of the electrical connections.
Make sure there are no exposed conductors
•
Check that sample pressure is controlled accuracately and is
maintained between 5 to 10 psig, according to the requirements
of your process.
NOTE: Special designed systems may require checks under vacuum
or high pressure (consult manual addendum).