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3.2.1
— Switch on / off key
3.2.2 — Calibration key
（
a
）
When in the measurement mode, press this key to enter into calibration mode.
（
b
）
When in the parameter setting mode, press this key to change the number or the ON/OFF
state.
3.2.3
— Function key
(a) When in pH measuring mode, short press to change measurment parameters, long press this
key to enter into parameter setting mode P1, P2, P3 ……
(b) When in Conductivity measuring mode, press this key to enter into parameter settings mode
P1, P2, P3 ……
(c) When in Fluoride measuring mode, press this key to enter into parameter setting mode P1,
P2, P3 ……
3.2.4
— Backlight and enter key
(a) When in the measuring mode, short press (< 1.5s ) to turn the backlight display on or off;
(a) When in the calibration mode or the parameter setting mode, press this key to confirm, and to
make the meter enter into measuring state;
(c) When in pH measuring mode, press this key to change resolution simultaneously: 0.01→0.1
pH
(d) When in Conductivity measuring mode, press this key to change parameter simultaneously:
TDS→SAL→RES→COND.
(e) When in Ion measuring mode, press this key to change parameter mode simultaneously: mg/L
→ ppm →
pX
3.2.5
— The combination key of memory storage and recall memory.
（
a
）
When in the measurement mode, short press this button (< 1.5s) to save the measuring data.
Long press this button(
＞
2s) to display the stored measuring data.
(b) When in the parameter setting mode, press this button to change the unit % → mol → g/cm3
→ g/L or turn the meter ON/OFF.
3.3
Memory Storage, Recall Memory, and Clear Memory:
3.3.1 Memory Storage
：
While in the measurement mode, when the measuring data is stable and the smiley face icon appears,
short press key(
＜
1.5s), LCD will display “ M+ ” icon and a storage serial, and meanwhile
storing all of the measuring information. It can store up to 300 groups.
