Hanna-instruments HI 9033 User Manual download pdf (Page 5)

For best results, choose a calibration solution with a conductivity or

TDS value as close as possible to the sample to be measured.

For example, for measurements in the 2 to 20 mS/cm range, use the

HI 7030 (12.88 mS/cm) conductivity calibration solution.

For accurate calibration, use two beakers for each solution: the first

one for rinsing the probe and the second one for calibration.

If possible, use plastic beakers to minimize any EMC interference.

For a complete list of HANNA instruments

calibration solutions see

the "Accessories" section.

PROCEDURE FOR HI 9033

• Fill a beaker with 8 cm (3¼") of conduc-

tivity calibration solution (if possible fill

two beakers, one for rinsing the probe

and one for calibration).

• Connect the probe to the meter securely

by aligning the pins with the socket,

pushing the plug in and tightening the

threaded ring.

• Immerse the probe into the beaker, while

paying attention that the holes on the

PVC sleeve are completely submerged.

• Turn the instrument on by pressing the ON/OFF key and select

the appropriate range (e.g. 19.99 mS/cm).

• Tap the probe repeatedly on the bottom of the beaker and stir it

to ensure that no air bubbles remain trapped inside the sleeve.

• If the probe temperature is close to the solution temperature, the

display will stabilize quickly and show the temperature compen-

sated conductivity measurement.

However, the ATC circuitry needs a few minutes for temperature

compensation if the temperature difference is about 5°C (9°F).

CALIBRATION

ON/OFF

TEMPERATURE EFFECT

HI 76302W conductivity probe features a built-in temperature sensor

that allows automatic compensation of the reading for any tempera-

ture differences.

Wait for a few minutes for the temperature sensor to reach the

thermal equilibrium with the test solution before taking measure-

ments. If the temperature of conductivity probe and solution is

drastically different, a longer time should be allowed.

AFTER MEASUREMENTS

When all measurements are completed, turn the

meter OFF and the clean the probe cleaned (see

"Probe Maintenance" section for details).

Note: Probe body and sleeve are made of PVC, and are susceptible

to damage due to temperatures exceeding 60°C (140°F). If

the probe is exposed to high temperature, the bond between

the rings and the probe body may become impaired and the

probe will not function properly. In this case, the probe will

need to be replaced.

19.99mS/c

ON/OFF

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Hanna-instruments HI 9033 User Manual Page 5

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