Teledyne 7300A manual 3.6Linearizer, Infrared Gas Analyzer, Start-upand Operation

Infrared Gas Analyzer Start-up and Operation

The CPU also provides appropriate control signals to the Displays, Alarms, and External Valve Controls, and accepts digital inputs for external Remote Zero and Remote Span commands. It monitors the power supply through an analog to digital converter as part of the data for the system failure alarm it performs timing and linearizing tasks too.

The RS-232 port provides two-way serial digital communications to and from the CPU. These, and all of the above electrical interface signals are described in detail in chapter 3 Installation.

3.6Linearizer

The output of the NDIR analyzer bench is non-linear (this is due to the effect known as “Beers Law”). Figure I shows this non-linear response.

NDIR Bench Output

Figure I

In order to produce a	Gas Concentration
	response, a compensation curve is
required (see Figure	a linearizer software routine is included

to create a linear response. Refer to section 4.3.7 and 4.8.2 to see how

linearizer is programmed.

Teledyne Analytical Instruments 3-7