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function is set.
6.6.3 Ammonia added pure water pH temperature compensation
setting (P3)
(a) Short press in mode P2 to enter mode P3, see picture (4-4).
(b) Press or to choose (ammonia added pure water pH
temperature compensation setting) or
(c) Press to enter next parameter setting or press to confirm and return
to measurement mode.
(d) The factory default setting is OFF
Note: If the ammonia pure water pH temperature compensation function is set,
will appear in the right upper corner of the LCD when in measurement mode.
6.6.4 Temperature unit °C/°F setting (P4)
(a) Short press in P3 to enter P4, see picture (4-5).
(b) Press or to choose temperature unit: °C or °F.
(c) Press to enter next parameter setting or press to confirm
and return to measurement mode.
6.6.5 Back light display time setting (P5)
(a) Short press in P4 to enter P5, see picture (4-6).
(b) Press or to choose the time of back light auto off: 0min,
1min, 3min or 6min. The back light will be closed if choosing 0 min.
(c) Press to enter next parameter setting or press to confirm
and return to measurement mode.
(d) The factory default setting for P5 is 1 min.
6.6.6 Auto power off time setting (P6)
(a) Short press in P5 to enter P6, see picture (4-7).
(b) Press or to choose the time: 0min, 10min or 20min. The
auto power off function will be closed if choosing 0 min.
(c) Press to enter next parameter setting or press to confirm
and return to measurement mode.
(d) The factory default setting for P6 is 10 min.