8.2.2.5 O
2
Reference value setting
8.2.4.1 Sub menu item setting
：Change O
2
reference value
：Move cursor up and down
：Change item
：Turn back to initial value
：Stop item selection, move to measurement window
：「8.2.1」 Draft sensor zero setting」
8.2.5 Draft measurement
8.2.3 Central current search
：Fix the draft measurement value
：「8.2.5.1 Draft sensor zero setting」
：Move to measurement window
：After fix the probe, enter to measurement window.
For draft measurement, please attach draft connector to "Draft -" port.
8.2.5.1 Draft sensor zero setting
：Next window
8.2.4 Sub menu
：Move cursor up and down
：「8.2.2.2 CO Cut- off」
（In case cursor position is in ［CO cut-off］）
：「8.2.4.1 Sub menu item setting」
（in case cursor position is in ［page selecting］）
：Move to measurement window
15
16
During zero setting, the color of the letter［F3key（zero)］ turns
to black.
Slowly insert probe to flue gas , then temperature sensor will
catch the highest temperature.
Once the probe left the highest temperature, alarm sound
becomes to short. Turn probe back to the former position and
fix the probe by the cone.
Max. 115 ：The
most highest temp.
Act. 106 ：Current
temp. which is
measured by
temperature sensor.
Initial value : Test gas＝0%,other items =3%
：「8.2.2.4 Fuel indication setting」
"CO
2
max" of left window indicates CO
2
max value of fuel.
The central current search can be switched off on Device
setting
Please ignore "A2" and "B".
After finish zero setting, ［F3key（zero）］turns back to normal.
Fuel type
The central current search is the function that to find the
most highest combustible gas temp. In case it is not
necessary, it can be off on 「8.4.1.1 Device setting 」
Draft sensor zero setting must be in the ambient air.
Notice
Zero