9
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 HI 7030 or HI 8030, 12880 µS/cm
(=12.88 mS/cm) conductivity solution, for HI 8633 and
HI 8733, and HI 7032, 1382 mg/L (=2764 µS/cm) TDS
solution, for HI 8734.
• ChecktempC or another accurate thermometer with 0.1°C
resolution (not necessary for HI 8733).
PROCEDURE FOR HI 8633 AND HI 8734
• Pour sufficient quantity of a conductivity
(HI 8633) or TDS (HI 8734) calibration
solution (e.g. HI 7030 or HI 7032) 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.
CALIBRATION
• Record the temperature of the buffer solution from the thermometer
(e.g. 20°C).
• Switch the instrument on by pressing On/Off.
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