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DO NOT
place the sensors directly into the buffer bottle. Discard the
used buffer after use.
9. When the reading has stabilised, press and hold the
key for 2
seconds to calibrate. If a 1 point calibration has been performed, a “
∗
“
will not be removed until a full 2 point calibration has been performed.
10. Rinse the pH and Temperature sensors in distilled water and blot
them dry.
11. Place both sensors into a small sample of pH4.00, pH9.23 or
pH10.00 Buffer, so that the bulb and reference junction are both
covered, as per the diagram in step 8.
DO NOT
place the sensors
directly into the buffer bottle. Discard the used buffer after use.
pH9.23 and pH10.00 buffers are highly unstable. Avoid using
these buffers if possible. Discard immediately after use
.
12. When the reading has stabilised, press and hold the
key for 2
seconds to calibrate. The “
∗
“ will now be replaced by a decimal
point, if calibration was successful.
13. The
Aqua-pH
is calibrated for pH and is ready for use in this mode.