Calibration – Hanna Instruments EC 214 User Manual
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• Press “COND/°C” to select conductivity read-
ing and select the appropriate range:
"199.9 μS"
for HI 7033
"1999μS"
for HI 7031
"19.99 mS"
for HI 7030
"199.9 mS"
for HI 7034
Note: If the display shows "1", there is an over-range condition.
Select the next higher range.
• Allow a few minutes for the reading to stabilize, then adjust the
“CALIBRATION” knob to read the calibration solution conductivity
value at 25°C (77°F), e.g. 12.88 mS/cm.
• All subsequent measurements will be referenced to 25°C (77°F).
• To reference the measurements to 20°C (68°F), adjust the
“CALIBRATION” knob to read the calibration solution conductivity
value at 20°C (68°F), e.g. 11.67 mS/cm. See the “Conductivity
vs. Temperature Chart” on page 13.
• Calibration is now complete and the instrument is ready for use.
PROCEDURE FOR EC215
• Pour a small quantity of the appropriate
calibration solution, e.g. HI 7030 (12.88
mS/cm @ 25°C), into a plastic beaker.
• Immerse the probe in the solution while
completely submerging the holes of the
sleeve. Tap the probe lightly on the bottom
of the beaker to remove any air bubbles
trapped inside the sleeve.
• Adjust the "TEMPERATURE COEFFICIENT" knob to 2%/°C.
The instrument should be calibrated at least once a month, or when
the probe is changed.
INITIAL PREPARATION
For better accuracy of measurements it is recommended to use the
calibration solution with a conductivity value as close as possible to
the sample to be measured. See the “Accessories” section for a
complete list of available HANNA calibration solution.
Rinse the probe thoroughly in distilled water.
If possible, use plastic beakers to minimize any EMC interferences.
PROCEDURE FOR EC214
• Pour a small quantity of the appropriate
calibration solution, e.g. HI 7030 (12.88
mS/cm @ 25°C), into a plastic beaker.
• Immerse the probe in the solution while
completely submerging the holes of the
sleeve. Tap the probe lightly on the bot-
tom of the beaker to remove any air
bubbles trapped inside the sleeve. Mea-
sure the solution temperature with a
Checktemp or another accurate thermom-
eter.
• Press the “COND/°C” key to select tem-
perature setting.
• Adjust the “TEMPERATURE” knob to display the temperature of
the solution on the LCD.
HI 7030
CALIBRATION
HI 7030