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8.2
Preparing for measurement
8.2.1
Zeroing phases
Gas sensors
If flue gas measurement or ambient CO measurement is configured, the gas
sensors are zeroed when the instrument is switched on (zeroing phase).
The flue gas probe must be in the open air during the zeroing phase!
Pressure sensor
If draft measurement or differential pressure measurement is configured, the
pressure sensor is zeroed when the instrument is switched on (zeroing phase).
Measuring the combustion air temperature
During the zeroing phase, the temperature is measured via the thermocouple of
the flue gas probe. This temperature is permanently accepted by the instrument
once the zeroing phase has been completed.
All dependent parameters are calculated using this value. However, ensure that
the flue gas probe is near the intake duct of the burner during the zeroing phase.
8.2.2
Using the flue gas probe
Danger of burns from hot probes, probe tubes and sensor
tips!
- Do not touch hot parts (> 113 °F / 45 °C) with bare
hands immediately after a measurement.
- In case of burns, cool the area immediately with cold
water and consult a doctor if necessary. Allow probes,
probe tubes and sensor tips to cool down.
- Before packing the device, switch off the device and
allow the probe tube to cool down.
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.
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