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key to confirm and return to measuring mode.
7.5.8. Back light display time setting (P7)
(a) Short press
key in mode P6 to enter mode P7, see picture
(4-9).
(b) Press or key to choose the time of back light auto
power off: 0 min, 1 min, 3 min or 6 min. The back light display
function will be closed if choosing a 0min.
(c) Press
key to enter next parameter setting or press
key to return to measuring mode.
(d) The producer setting for P7 is 1min.
7.5.9.Auto power off time setting (P8)
(a) Short press
key in mode P7 to enter mode P8, see
picture (4-10).
(b) Press or key to choose the time: 0min, 10min or
20min. The auto power off function will be closed if choosing
0min.
(c) Press
key to enter next parameter setting or press
key to conform and return to measuring mode.
(d) The producer setting for P8 is 10 min.
7.5.10. Restore to producer setting (P9)
(a) Short press
key in mode P8 to enter into mode P9, see
picture (4-11).
(b) Press or key to choose
“ ON
”
, meaning that
parameters have been restored to the default setting mode, and
restore to measuring mode after 2 seconds.
7.7
Considerations:
7.6.2. We recommend calibrating once every month under the normal circumstances; It is
necessary to calibrate the newly purchased conductivity electrode or an electrode that hasn’t
been used for a long time;
7.6.4. The surface of 2301-S conductivity electrode is plated with a layer of metal platinum black
to lower the electrode polarization and enlarge measuring range. Do not brush the surface of
platinum black, only rinse it with purified water, in case damaging the platinum black coating;
organic pollutants can be washed with warm soap water.
7.6.5. Conductivity electrode before use can be immersed in purified water to prevent the platinum
black from passivation. If the platinum black plated electrode is invalid, users can immerse
