Using The Modular Flue Gas Probe - TESTO 330-1G Instruction Manual

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6 Using the product
that the flue gas probe is near the intake duct of the burner during
the zeroing phase.
If a combustion air temperature probe is connected, the combustion
air temperature is measured continuously via this probe.
Gas zeroing
When the instrument is switched on the measurement menu is
opened and the gas sensors are zeroed.
testo 330-1 LL: The flue gas probe must be in the open air
during the zeroing phase!
testo 330-2 LL: The flue gas probe can be in the flue gas
duct even during the zeroing phase, if a separate VT-
sensor is plugged in.
Draught / pressure zeroing
The pressure sensors are zeroed when a pressure measuring
function is called up.
testo 330-1 LL: The flue gas probe must be in the open air
during the zeroing phase / the instrument must not be
pressurised during zeroing!
testo 330-2 LL: The flue gas probe can be in the flue gas
duct even during the zeroing phase, if a separate VT-
sensor is plugged in. The pressure socket of the instrument
must be free (i.e. unpressurized, not closed).
6.2.1.2.

Using the modular flue gas probe

Checking the thermocouple
The thermocouple of the flue gas probe must not lie against the
probe cage.
> Check before use. Bend the thermocouple back if necessary.
Aligning the flue gas probe
The flue gas must be able to flow freely past the thermocouple.
> Align the probe by turning it as required.
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