8-Efficiency
E F F I
C I
E N C Y
B A S I
S
?
G R O S S
Pressing any of the numeric (0-9) will toggle the efficiency basis
between gross and net efficiency i.e. the calculated efficiencies
based on the gross and net calorific values for the selected fuel
respectively. When the desired state is displayed it should be
selected by pressing the return key.
9-Calibration Oxygen Level
The calibration oxygen level function is used to set the calibration
oxygen level to the ambient atmospheric value (i.e. 20.9% v/v O
2
).
When this option is chosen the pump will automatically be switched
on, if not already, and a clean air sample should then be drawn
through the instrument. While the oxygen sensor reading is
approaching the calibration value of 20.9% the following screen
will be displayed with the cal.O2 value gradually approaching the
atmospheric value:
D A T E
0 9 _ 1 0 _ 9 5
T I
M E
1 5 :
0 3 :
2 8
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
C A L .
O 2
-
-
2 0 .
9 7
When the oxygen reading has reached a stable value and achieved
its calibration state the bottom line of the display will change to:
O 2
%
2 0 .
9
