Bluelab Soil pH Meter - Manual (Page 5)

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3.0 Calibration cont.
To calibrate the pH
Clean soil pH probe tip.
See section 8.0 (the soil pH probe does not
require cleaning before the fi rst use).
pH 7.0 calibration
a) Turn soil pH meter on. Rinse soil pH probe
tip in fresh water, shake off excess water and
place in a pH 7.0 calibration solution. Wait for
at least one minute or longer if required for
reading to stablize to a constant value.
b) Long press the ‘calibrate’ button. When the
display shows CAL release button.
pH 7 indicator is displayed indicating
a successful pH 7 calibration.
The pH 4 indicator will now fl ash
indicating pH 4.0 or pH 10.0
calibration is now required.
c) If Err appears during the calibration process
see section 9.0.
d) The soil pH meter must be calibrated to two
points. If after an hour the soil pH meter has
not been calibrated with a second calibration
point the calibration indicators disappear and
the soil pH meter reverts to an uncalibrated
state. Calibration is required.
pH 4.0 / 10.0 calibration
a) Rinse the pH probe tip in fresh water, shake
off excess water and place the
pH probe tip in either pH 4.0 or pH 10.0
calibration solution.
b) Wait for at least one minute for reading to
stabilize to a constant value.
c) Long press the ‘calibrate’ button. When the
display shows CAL release button.
pH 7 / pH 4 is displayed
or pH 7 / pH 10 is displayed
d) The pH meter is now calibrated and ready
for use.
e) After 30 days, the calibration indicators
disappear to let you know calibration is required.
Store the soil pH probe
Add enough Bluelab pH Probe KCl Storage Solution
into the probe storage cap to fully submerge the
soil pH probe tip. Place storage cap on probe.
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Successful pH 7
and pH 4 calibration
pH 4.0 or
pH 10.0
calibration
solution
pH 7.0
calibration
solution
clean the soil pH probe
rinse in tap water
Ensure probe tip is covered by
the KCl storage solution in cap