UEi Test Instruments KM9106/P - Manual (Page 60)

KM9106 Operators Manual 60
CxHy : Unburnt HydroCarbon reading in % of LEL of Methane, the
sensor is calibrated with Methane. Displayed when a
HydroCarbon sensor fitted.
LEL is the Lower Explosive Limit of a gas when mixed with air,
for Methane this has the ratio of 19:1 Air:Methane. Below the
LEL the mixture can not ignite and burn. In the Flue an unburnt
HydroCarbons should be well below this level or there is the
potential for an explosion.
LOSS :
Total losses calculated from Combustion Theory. This is the
summation of the next three parameters.
DRY :
Calculated heat lost in turning the Carbon in the fuel to Carbon
Dioxide (CO
2
).
WET :
Calculated heat lost in turning the Hydrogen in the fuel into
water (H
2
O).
CO LOSS % :
Calculated loss due to partially burnt Carbon. Any Carbon
Monoxide (CO) in the flue has the potential to be turned into
Carbon Dioxide and release more heat, hence this heat is lost up
the flue.
OS11 % :
Oxygen sensor life indicator. This is an approximation calculated
from the output voltage of the sensor in fresh air. Note ! This is
not valid when a combustion test is being performed.
H2xc :
The Carbon Monoxide sensor is Hydrogen compensated. This
parameter is the reading from the Hydrogen sensor built into CO
sensor. It is an indication of the level if Hydrogen in the flue and
can NOT be used as an exact level, it is only used to cross
compensate the CO sensor.
AUX1 :
Auxilliary sensor position, to be used for future sensors.