When measuring ambient CO, observe:
· The ambient CO probe must be situated in fresh air (CO-free) during the
zeroing phase.
· Cigarette smoke influences the measurement by more than 50ppm. The
breathed air of a smoker influences the reading by approx. 5ppm.
· The flow impact of the gas influences the measurement accuracy. Frontal
impact on the sensor leads to higher measurement values. The best
measurement results are acheived with a slight movement of the probe back
and forth.
Taking
a
measurement:
The instrument is in measurement view.
The measuring program AUTO or TURB is not activated (435-2/-4 only).
Put the probe in position and take the readings.
Changing
the
upper
measurement
channel
line
display:
Press .
Changing
the
lower
measurement
channel
line
display,
showing
the
max./min.
value
of
the
variable
in
the
upper
measurement
channel
line:
Press .
- The following are displayed in consecutive order:
· Available measurement channels
· Maximum value of the variable in the upper display line
· Minimum value of the variable in the upper display line
· Lower measurement line not shown
Resetting
max./min.
values:
The minimum or maximum values of all measurement channels are reset.
1 Press several times until the maximum or minimum value is displayed.
2 Reset the max./min. values with .
Holding
readings:
Press .
Press to change back to displaying the actual reading.
Saving
readings
(435-22/-44
only):
Press .
- A measurement protocol with the readings of all available measurement
channels is created for the active location.
Save
Act
Hold
Reset
7. Measuring 27
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