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Figure 3-42 selected “CODE_SET " Figure 3-43 setting the new password
Figure 3-44 Confirm password has been saved
（2）
Alarm value setting
Select the
ALAM_SET
in
PARA_SET
menu (as Figure 3-45), entering the
ALAM_SET
interface after confirmation (as Figure 3-46), the alarm setting data of last
time is displayed on the screen before inputting the new value, Figure 3-46 displays
the alarm setting of last time, the instrument shall alarm if the gas concentration
exceeds the 3ppm, press up key, down key and confirm keys to input new alarm value,
press the confirm button to save the alarm value setting. Instrument has multi-levels
alarm, one to two times of the setting value is the first alarm interval, two to three the
second interval, exceed three times the third interval. Their alarm sound is different.
Figure 3-45 Selected the ALAM_SET Figure 3-46 Input alarm value
（3）
Volume Setting
Select
VOLUNE
setting in the
PARA_SET
menu item (as Figure 3-47),
subsequently the displayed data is the previous volume setting value, entering the
