- 7 -
Note:
all sensors have the preheating process, if the preheating time is
skipped, the numerical value may be unsteady or incorrect, so this operation is not
suggested by the maker.
3.4. Measuring state
After completing preheating, the machine enters into the measuring state, and
the measuring interface is generally as follows.
a. The first line displays time and battery capacity
.
b. In the second line, co
2
is the gas type, and the machine display the
different name for the different gas types.
c. In the third line, the big character 850.6 is the air concentration
value---the measuring value. The different measuring results display the
different values.
d. The fourth line displays the unit. At present, the selectable units of the
machine have PPM, %VOL, %LEL, mg/m
3
. The other units can be
customized specially according to the demand of customers.
3.5 Menu setting interface
The menu interface adopts the classical 9-level menu catalogue, in the
