6. KEY OPERATION
P.7
1. Power on/off Button
When power is off: short press to turn device on.
When power is on: a. Press this button to open/close backlight.
b. Press this button over 2 seconds to turn off
the meter.
c. Auto-off without operation 15 minutes.
2. °C/°F Button
a. Short press to store the current measured pressure value (can store
up to 100 groups).
b. Long press to exit the storage mode.
c. Press and hold for more than 2 seconds to switch the °C/°F unit.
3. HOLD Button
a. Press to lock and hold the current data.
b. Press and hold for more than 2 seconds to clear the drift zero. (The
data before measurement does not return to zero.
a. Short press to switch up to 12 pressure unit.
b. Press and hold for more than 2 seconds to clear the stored data.
4. UNITS Button
a. Short press to view stored data.
b. Press and hold for more than 2 seconds to enter P1 and P2 dual
channel differential pressure mode.
c. Press and hold for more than 2 seconds to exit differential pressure
mode.
5. DIF Button
