G.2.12 Ambient CO
An ambient CO probe (recommended) or a flue gas probe must be connected.
Cigarette smoke influences the measurement by more than 50 ppm. The breath of a
smoker influences the measurement by about 5 ppm.
When using an ambient CO probe, note that:
The direction of flow of the gas has an effect on the accuracy of measurement.
Frontal flow onto the probe leads to higher readings. The best measurement results
are achieved when the probe is moved gently backwards and forwards.
When using the ambient CO probe 0632 1247, note that:
The sealing cap must remain closed during the zeroing phase.
Only open the sealing cap for the period of measurement.
When using ambient CO probe 0632 3331 or a flue gas probe, note that:
The probe must be located in fresh air (CO free) during the zeroing phase.
Calling up the function:
Measurements
Ambient CO
.
Measuring:
1 Start measurement:
.
- If measuring using a flue gas probe or the ambient CO probe 0632 1247 possibly:
gas zeroing (30 s).
- Measuring starts and the reading is displayed as a number and graphically.
- An alarm message is given if the alarm threshold is exceeded.
Set alarm threshold: see
Alarm limits, p. 29.
2 Stop measurement:
.
- The reading is recorded.
Options:
To print the reading:
.
3 Copy the reading to the
Flue gas
menu: .
- The
Measurements
menu is opened.
OK
Stop
Start
OK
OK
G. Measuring
G.2 Measurements
43
