Teledyne M300EM Operation within the M300E/EM Analyzer, Pneumatic Operation of the O2 Sensor

Optional Hardware and Software Teledyne API – Technical Manual - Model 300E Family CO Analyzers

5.8.1.2.Operation within the M300E/EM Analyzer

The oxygen sensor option is transparently integrated into the core analyzer operation. All functions can be viewed or accessed through the front panel, just like the functions for CO.

∙The O2 concentration is displayed in the upper right-hand corner, alternating with CO concentration.

∙Test functions for O2 slope and offset are viewable from the front panel along with the analyzer’s other test functions.

∙O2 sensor calibration is performed via the front panel CAL function and is performed in a nearly identical manner as the standard CO calibration. See Section 9.7.1 for more details.

∙Stability of the O2 sensor can be viewed via the front panel (see Section 9.7.1.3).

The O2 concentration range is 0-100% (user selectable) with 0.1% precision and accuracy.

The temperature of the O2 sensor is maintained at a constant 50° C by means of a PID loop and can be viewed on the front panel as test function O2 TEMP.

The O2 sensor assembly itself does not have any serviceable parts and is enclosed in an insulated canister.

5.8.1.3.Pneumatic Operation of the O2 Sensor

∙Pneumatically, the O2 sensor draws a flow of 80 cm³/min in addition to the normal sample flow rate. It is separately controlled with its own critical flow orifice.

Figure 5-15: M300E/EM – Internal Pneumatics with O2 Sensor Option 65A

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