UEi Test Instruments KM9106/P - Manual (Page 11)

KM9106 Operators Manual 11
4.4 Sampling the Flue Gas
Once the automatic calibration procedure has been completed and the specific fuel has
been selected the probe can be inserted into the desired sampling point.
It is recommended that the sampling point be located at least two flue diameters
downstream of any bend and that the probe tip is in the centre of the flue (this is
normally the point of the hottest temperature). With balanced flues and other domestic
units the probe should be positioned far enough into the flue so that no air can ‘back
flush’ into the probe.
The probe depth stop cone provided with the instrument allows the probe to be used
in holes whose diameters range from 8 mm to 21 mm (
5 /
16
to 4 /
5
inch).
The standard probe is rated at 650 °C/1202°F. Temperatures of up to 1100°C/2012°F
can be accommodated using an optional high temperature probe.
TIP: To conserve battery power, switch off the pump when you are not taking a
measurement. Use the key to turn the pump ON and OFF.
PUMP