9
Note: If the display shows only a “1” on
the far left hand side, the meter is out of
range. Select the next (higher) range.
• Wait for a couple of minutes for the temperature sensor to reach
thermal equilibrium with the sample before taking measurements.
• After the measurement has been completed, the instrument should
be switched off and the probe should be cleaned and dried (see
“Probe Maintenance” on page 17).
CALIBRATION
Accessories needed:
• Use any calibration solution within the meter’s range. The
solution should ideally be close to the samples being measured.
Use for example HI7030 or HI8030, 12880 µS/cm (=12.88
mS/cm) conductivity solution, for HI8633 and HI8733, and
HI7032, 1382 mg/L (=2764 µS/cm) TDS solution, for
HI8734.
• ChecktempC or another accurate thermometer with 0.1 °C
resolution (not necessary for HI8733).
PROCEDURE FOR HI8633 AND HI8734
• Pour sufficient quantity of a conductivity
(HI8633) or TDS (HI8734) calibration
solution (e.g. HI7030 or HI7032) into a
beaker to cover the holes on the probe. If
possible, use plastic beakers to minimize
any EMC interference.
• Immerse the conductivity probe, making
sure that holes are completely submerged,
and the ChecktempC in the solution.
• Wait for a couple of minutes for thermal
equilibrium to be reached.
• Tap the probe on the bottom, then shake it while rotating to make
sure no air bubbles remain trapped in the sleeve.
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