bluelab Combo Meter Care And Use Manual page 5

3.0 Calibration cont.
3.0 Calibration cont.
To calibrate the pH
Clean pH probe tip.
1
See Section 8.0 (the pH probe does not require
cleaning before the first use).
pH 7.0 calibration
2
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. Long press until
display flashes. Leave probe in solution
while the display is flashing. If Calibration is
successful pH7 will be displayed.
The pH4 indicator will now flash indicating pH 4.0
or pH 10.0 calibration is now required.
b) 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
3
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) Long press until display flashes. Leave probe
in solution while the display is flashing. If
Calibration is successful pH 4.0 or pH 10.0 will
be displayed.
pH 7 / pH 4 is displayed
or pH 7 / pH 10 is displayed
c) The combo meter is now calibrated and ready
for use.
d) After 30 days, the calibration indicators
disappear to let you know calibration is required.
Store the pH probe
4
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.
5
clean the pH probe
pH 7.0
calibration
solution
rinse in tap water
pH 4.0 or
pH 10.0
calibration
solution
Successful pH 7
and pH 4 calibration
Ensure probe tip is covered by
the KCl storage solution in cap