Calibration - Hanna Instruments HI700 Series Instruction Manual

CALIBRATION

EC CALIBRATION
Initial Preparation
The controller is factory calibrated for temperature as well as for the analog input and
outputs.
The user should periodically calibrate the instrument for EC or TDS. For greatest accuracy,
it is recommended that the instrument is calibrated frequently.
Before beginning normal operation,it is recommended to standardize the probe with
the Hanna Instruments calibration solution close to the expected sample value and
inside the selected range.
Range
0.0 to 199.9 µS
0 to 1999 µS
0.00 to 19.99 mS
0.0 to 199.9 mS
The user should select the appropriate range to calibrate (setup code 03). Calibration
must be performed for each range used.
The temperature probe should also be connected to the process meter. The meters are
equipped with a stability indicator. The user is also guided with indications on the display
during the calibration procedure.
Pour a small quantity of the calibration solution (e.g. 1413 µS) into a beaker. If possible,
use a plastic beaker to minimize any EMC interference.
For accurate calibration use two beakers containing the same solution, the first one for
rinsing the probe, the second one for calibration. By doing this, contamination between
the solutions is minimized.
To obtain accurate readings, use the calibration solution in the selected range and closer
to the values to be measured.
Calibration point(s)
84.0 µS
1413 µS
5.00 - 12.88 mS
80.0 - 111.8 mS
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