Hach Intellical MTC30101, User Manual

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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:
• Additional standards can be selected in the Calibration Options.
• Do not dilute ORP/Redox standards. Use fresh ORP/Redox standard for calibration.
• ZoBell’s redox potential is temperature dependent. The HQd calibration routine
factors in this temperature dependency allowing accurate calibrations within the
temperature range of 0 to 30 °C (32 to 86 °F). Light’s solution should be read at 25 °C
(77 °F). Custom ORP/Redox calibration solution values and temperature are user-
defined.
• 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 12.
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
ORP/Redox
standard solution
that is necessary
for calibration.
3. Add the fresh
ORP/Redox
standard solution
to a beaker or an
appropriate
container.
4. Rinse the
probe with
deionized water.
Blot dry with a lint-
free cloth.
5. Put the probe
in the standard
solution so that
the temperature
sensor is
completely
submerged. Stir
gently. Shake the
probe from side to
side in the sample
to refresh the
reference junction.
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