User Guide

Teledyne API M100E Analyzer Operation Manual Optional Hardware and Software
63
Figure 5-8: Rear Panel with Ethernet Installed
For more information on setting up and using this option, refer to Section 7.1.6.
5.8.5. ETHERNET + MULTIDROP (OPT 63C)
This option allows the instrument to communicate on both RS-232 and ETHERNET networks simultaneously. It
includes the following:
 RS-232 MULTIDROP (OPT 62)
 ETHERNET (OPT 63A)
5.9. SECOND GAS SENSORS
In addition to measuring SO
2
the unit can be equipped with an optional sensor to measure a second gas, either
oxygen or carbon dioxide.
NOTE
Two sensor options are available with the M100E. Refer to Section 5.9.1 (O
2
Sensor) and Section 5.9.2
(CO
2
Sensor). Only one sensor option (O
2
or CO
2
) can be used in conjunction with the M100E.
5.9.1. OXYGEN SENSOR (OPTION 65A)
This option is a sensor that paramagnetically measures the concentration of oxygen in the sample gas.
5.9.1.1. THEORY OF OPERATION - PARAMAGNETIC MEASUREMENT OF O
2
The oxygen sensor used in the M100E utilizes the fact that oxygen is attracted into strong magnetic field while
most other gases are not, to obtain fast, accurate oxygen measurements.
The sensor’s core is made up of two nitrogen filled glass spheres, which are mounted on a rotating suspension
within a magnetic field (refer to Figure 5-9). A mirror is mounted centrally on the suspension and light is shone
onto the mirror that reflec
ts the light onto a pair of photocells. The signal generated by the photocells is passed
to a feedback loop, which outputs a current to a wire winding (in effect, a small DC electric motor) mounted on
the suspended mirror.
04515F DCN6048