Bluelab Combo Meter - Manual (Page 5)

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5
3.0 Calibration cont.
To calibrate the pH
Clean pH probe tip.
See Section 8.0 (the pH probe does not require
cleaning before the fi rst use).
pH 7.0 calibration
a) Turn pH meter on. Rinse 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 11.0.
d) The combo meter must be calibrated to two
points. If after an hour the combo meter has not
been calibrated with a second calibration point
the calibration indicators disappear and the
combo 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 pH probe
Add enough Bluelab pH Probe KCl Storage Solution
into the probe storage cap to fully submerge the pH
probe tip. Place storage cap on probe.
1
2
3
4
pH 4.0 or
pH 10.0
calibration
solution
pH 7.0
calibration
solution
clean the pH probe
rinse in tap water
Ensure probe tip is covered by
the KCl storage solution in cap
Successful pH 7
and pH 4 calibration