TESTO 325M - Measuring (Continued); Undiluted CO Measurement; Ambient CO Measurement

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7. Measuring
7.4 Measuring undiluted CO
Always carry out a COundiluted measurement prior to a
flue gas measurement because the values for O2, CO and
in the instrument are overwritten during a COundiluted
measurement.
1 Select CO undil in the main menu ➀ and confirm via .
- The pump starts automatically and the measured value for
undiluted CO (uCO) is shown ➁.
2 End measurement via .
- The last reading is retained in the instrument until the next
COundiluted measurement.
7.5 Measuring ambient CO
Always carry out an ambient CO measurement before a
flue gas measurement since a value for CO, retained in
the analyser, will be written over when ambient CO is
measured.
Carry out zeroing in fresh air (preferably outdoors) prior to
measuring ambient CO.
1 Select CO amb in the main menu ➀ and confirm selection
with .
- The pump starts automatically and the measured value for
ambient CO ( ) is displayed.
2 End measurement via .
- The last reading is retained in the analyser until the next
ambient CO measurement.
➁➀
➁➀
CO undil CO undil
CO amb CO amb