Teledyne 7300A manual Gas Requirements, Command Description, Parameter Setting

Infrared Gas Analyzer Installation 2

	Table 2-8: Commands via RS-232 Input
Command	Description
as<enter>	Immediately starts an autospan.
az<enter>	Immediately starts an autozero.
rp<enter>	Allows reprogramming of two System functions:
	APPLICATION (gas use) and ALGORITHM (linearization).
st<enter>	Toggling input. Stops/Starts any status message output from
	the RS-232, until st<enter> is sent again.

Implementation: The RS-232 protocol allows some flexibility in its implementation. Table 2-9 lists certain RS-232 values that are required by the Model 7300A implementation.

Table 2-9: Required RS-232 Options

Parameter	Setting
Baud	2400
Byte	8 bits
Parity	none
Stop Bits	1
Message Interval	2 seconds

2.4Gas 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.

Teledyne Analytical Instruments 2-11