5
⑧ — —
Indication icon of low voltage, appears when the voltage less than 2.4V, call
attention to change the batteries.
3.2. Operation Keys:
The meter has 7 operation keys in all.
3.2.1.
—
Switch key
In the measurement mode open and shutdown function , other mode keys do not work.
3.2.2.
—
Calibration key
(a) When in the measurement state, press this key to enter into calibration mode.
(b)When in the non - measurement state, the key is returned as the exit key.
3.2.3.
—
Function key
When in the measuring state
，
Short-time press (time
≤
1.5s)
，
cyclic changing unit:
→
3.2.4.
—
Back light and Data deleting key
(a) When in the measuring state, short press (less than 1.5s) to open or close the back
light display;
(b) When in the storage record query state,long press (more than 5s) delete save data.
3.2.5.
—
increase and query key,
—
reduce and save key
(a)When in the measuring state, short press
(
≤1.5s
),
save measure data,
Short press
(
≤1.5s
),
resume shows the save data
(b) When in the parameter setting state,
and
change parameter size
3.2.6.
—
The entrance key and return key
