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corner shows two-point calibration icons
L
and
H
; The instrument automatically enters measuring
mode.
4.3
Sample Measuring
4.3.1
Rinse the fluoride-ion electrode in distilled or deionized water and dap off excess water
with clean tissue; soak into solution, stir gently and let it stand still; get the readings
when
measuring vaule is stable and stays on screen.
4.3.2
Hold to
show
Fluoride concentrations in different units, release after selection.
4.3.3
Short press
key, the meter enters the
mV
mode and displays the mV value of the
fluoride ion
concentration.
4.4
Parameter settings
Table (4-3)
Symbol
Parameter sets the project
Code
Parameters
P1
Temperature unit selection
℃ ℉
P2
Backlight display time setting
0-1-3-6 min
P3
Auto power off time setting
0-10-20 min
P4
Restore to factory default
settings
OFF-ON
4.4.1 Temperature units ° c/ºf selection (P1)
Long Press
to
enter P1
，
remaining operations see section 5.4.5
4.4.2 Backlight display time setting (P2)
In P1, long press
to
enter P2
，
remaining operations see section 5.4.6
4.4.3 Auto-off time setting (P3)
In P2, press
to
enter P3
，
remaining operations see section 5.4.7
4.4.4 Restore factory default (P4)
In P3, press
to
enter P4
，
remaining operations see section 5.4.8
4.5
Special Notes
4.5.1 The meter does not automatically recognize calibration solutions. Pleae make sure to use
correct solution according to the displayed reminders "0.19 mg/L " or " 19.00 mg/L ".
