The connected probe 0632.1247 is initialised during the switch-
on phase (“Count Down” runs in the display). For this reason,
the measuring instrument should only be switched on in an
atmosphere free of CO. Values will be too low otherwise in
subsequent measurements.
If you want to initialize the instrument while switched on, place
the probe in an atmosphere free of CO. Press and confirm
initialisation of the CO probe (CO=0) by pressing again.
29
CO/CO2 measurement (testo 445)
CO measurement (testo 445)
Connect probe before switching on the instrument
The protective cap must be on the probe during the initialisation
phase (otherwise risk of inaccurate measurements).
The initialisation cap should only be removed during the actual
measurement and should be replaced directly afterwards
(mechanical protection of sensor and adherence to
accuracies).
Cigarette smoke influences the measurement (min. 50 ppm).
A smoker’s breath influences the measurement by approx.
5 ppm.
Switch on - Initialisation phase (60 s).
The ambient CO probe is initialised during the initialisation phase.
• Remove yellow protective cap.
• Probe can be put in shirt pocket, for example. The direction
of the flow on the probe influences the accuracy of the
measurement. Optimum measured results are achieved by
moving the probe gently back and forth. If the air blows head-
on on the sensor, the values measured will be too high.
1.888.610.7664 info@Testo-Direct.com
www.Testo-Direct.com
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