3.4 Reading Stability Display Mode
When the measuring value is stable, smiley icon appears on LCD,
see Diagram – 4. If the smiley icon does not appear or flash, please do
not get the reading value or make calibration until the measuring value is
stable. Per parameter P1.3, there are 3 criteria for stability standard:
(Normal), (High), and (Low). The factory default is set “Normal”.
“High” is set for stability for longer time, “Low” is set for stability for shorter
time. User can select suitable stability criteria according to different testing
requirement.
3.5 Automatic Lock-Up Display Mode
Select On from parameter P4.6 to turn on automatic lock-up display function.
When the reading value stabilizes more than 10 seconds, the meter locks the
measuring value automatically and displays HOLD icon, see Diagram – 5.
In the HOLD mode, press to release lock-up.
3.6 Automatic Power-off
The meter will be power-off if there is no operation for 20 minutes. The time of auto power-off can be set in
parameter setting P3.2
3.7 Temperature Adjustment
When the temperature probe does not connect to the meter, long press key, temperature value flashes,
then long press key or short press key to change the temperature value in one way, and press
key to make confirmation.
4 pH Measurement
4.1 pH Electrode Information
The meter matches 201T-F plastic three-in-one combination pH electrode with built-in temperature
sensor to realize automatic temperature compensation. Electrode housing adopts polycarbonate
engineering plastics which is corrosion and impact resistant. The BNC socket of electrode connects pH
socket; RCA socket connects temperature socket. When dip the electrode in the solution, please stir the
solution briefly and allow it to stay in the solution until a stable reading is reached.
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