6
7. Operation steps
7.1 Open battery cover and install a 9-volt battery in the battery compartment.
Press power key to start measuring
7.2 press UNITS key，choosing proper unit
7.3 connect Tube
7.4 read the testing values on LCD display
Note：when the meter is on, no gas pressure input, the meter will not
necessarily be zero, you need to reset by yourself.
8. Buttons function
8.1
Key；it can turn on and turn off the meter，press“
”, open
manometer, the screen will display about 2 seconds, and then enter normal
measurement model.
8.2
Key；after power on the meter，pressing this button can turn on and
turn off the backlight.
8.3
Key；in measurement mode，press“
”, it can review Max ,Min, Avg
values. In this mode, other button functions are locked not operated. Press
