UEi Test Instruments KM9106/P - Manual (Page 57)

KM9106 Operators Manual 57
APPENDICES
A - Parameter Meanings
The parameters and their meanings are detailed as follows : -
DATE :
Analyser date. See Section 6.1 to change.
TIME :
Analyser time. Use Section 6.1 to change.
INSTABILITY : This is an indication of how stable the signals are from all the
sensors. 0 = high stability, 10 = high instability. When measuring
flue gases, pressure and temperature this number will rise as the
sensed inputs varies. At start up when sampling fresh air this
number is invariably 0.
BATTERY :
Displays the battery level from 0-100%. The analyser will flash
RECHARGE BATTERY at less than 10 % of charge. The
analyser may show levels greater than 100% when the charger
connected.
FUEL :
The fuel used in calculation of efficiency and Carbon Dioxide.
K1g: Gross calorific fuel constant. See Appendix B for calculation.
K1n :
Gross calorific fuel constant. See Appendix B for calculation.
K2 :
Percentage Maximum theoretical CO2 (dry basis).
K3:
Percentage wet loss.
K4 :
Percentage unburnt carbon loss.
O2r :
Toxic gas measurements can be referenced to defined oxygen
levels.
Oxygen referencing is required by some regulations such as TA-LUFT. If a reference
value is selected the toxic gas measurements will be displayed with the symbol n
attached to the units. i.e.ppmn
What does Oxygen reference mean ?
If 3 % O2 reference is selected and 5 % O2 is measured in the flue then toxic gas
values will be recalculated as if 3 % were measured. The equation for referencing is
detailed in the Appendix.
Oxygen referencing prevents false readings being submitted, e.g. allowing more air
into the boiler will increase the oxygen level in the flue and hence dilute any toxic gas
reading. Oxygen referencing gives readings as if they were undiluted.