Hach-Lange PHC20103 User Manual - Manual (Page 3)

Calibration notes
• pH buffers can be used in any order. Use buffers that are two pH units apart.
• Additional standard sets along with the minimum number of calibration points can be
selected in the Calibration Options. For a two point calibration, it is recommended that
two buffers be selected: one with a pH above and one with a pH below the expected
sample pH. For a one point calibration, select the buffer nearest to the expected sample
pH.
• The calibration is recorded in the probe and the data log. The calibration is also sent to
a PC, printer or flash memory stick if connected.
• Air bubbles under the sensor tip when submerged can cause slow response or error in
measurement. If bubbles are present, gently shake the probe until bubbles are removed.
• If a calibration error occurs, refer to Troubleshooting on page 10.
Calibration procedure PHC201
1. Connect the
probe to the meter.
Make sure that the
cable locking nut is
securely
connected to the
meter. Turn on the
meter. 2. Push
Calibrate . The
display shows the
buffers that are
necessary for
calibration.
3. Prepare the
fresh buffers in
separate beakers
or appropriate
containers. 4. Rinse the probe
with deionized
water. Blot dry with
a lint-free cloth. 5. Put the probe in
the pH buffer
solution and stir
gently. Make sure
that the reference
junction is
completely
submerged. Shake
the probe from
side to side in the
standard solution
to refresh the
reference junction.
6. Push Read .
Stir gently. The
display will show
"Stabilizing" and a
progress bar as
the probe
stabilizes in the
standard. The
display shows the
buffer that has just
been read and
shows the
temperature
corrected pH value
when the reading
is stable.
7. Repeat steps 4
- 6 until the
minimum number
of calibration
points specified in
the current method
have been
collected. 8. Push Done to
view the calibration
summary. The
display will not
show Done until
the minimum
number of
calibration points
have been
collected.
9. Push Store to
accept the
calibration and go
back to
measurement
mode.
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