Teledyne 200AH 用户手册

 

concentration is measured and stored internally. The valve is then switched, routing the sample 
gas through the converter, the signal measured is the NO

X

 concentration which is also stored in 

the computer. 

The [NO

2

] component is calculated by subtracting [NO

X

] - [NO] = [NO

2

] using the built-in 

computer. The three results [NO], [NO

X

], and [NO

2

] are then further processed and stored by the 

computer yielding several instantaneous and long term averages for all three components. 

Periodically, the AutoZero valve switches allowing the analyzer to read zero background. The 
AutoZero readings are subtracted from all of the other readings. This improves zero baseline 
stability. 

The Oxygen Sensor used in M200AH utilizes the paramagnetic susceptibility of oxygen, a 
physical property that distinguishes oxygen from most other common gases. 

The sensor incorporates two nitrogen-filled glass spheres mounted on a strong rare metal taut-
band suspension. This assembly is suspended in a symmetrical non-uniform magnetic field. 
When the surrounding gas contains paramagnetic oxygen, the glass spheres are pushed further 
away from the strongest part of the magnetic field. The strength of the torque acting on the 
suspension is proportional to the oxygen content of the surrounding gases.