Calibration
Before calibration:
The probe must have the correct service-life time stamp. Set the date and time in the meter before the probe is attached.
It is not necessary to recalibrate when moving a calibrated probe from one HQd meter to another if the additional meter is
configured to use the same calibration options.
To view the current calibration, push
, select View Probe Data, then select View Current Calibration.
If any two probes are connected, push the
UP
or
DOWN
arrow to change to the single display mode in order to show the
Calibrate option.
Prepare the probe for use (refer to
Preparation for use
on page 2).
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 11.
Calibration procedure:
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
junctions are
completely
submerged.
Shake the probe
from side to side
in the standard
solution to refresh
the reference
junction.
3