Hanna-instruments HI 4521 Manual de usuario descargar pdf (Pagina 32)

after the logging session was started.

To set the Logging Type:

• Use

or to select the

Log

option.

• Press and use or to highlight the

Logging Type

option.

• Press and use or to highlight the

desired option.

• Press to confirm your selection or press to

cancel operation.

Logging Data Configuration

This option allows the user to select the parameters that accompany a logged value:

Date / Time, Calibration Data,

Sample ID, Instrument ID, Operator ID, Company Name, Aditional Info 1

and

Aditional Info 2.

To set the Logging Data Configuration:

• Use or to select the Log option.

• Press and use or to highlight the

Logging Data Configuration

option.

• Press and use or to highlight the

desired parameter to be logged in file.

• Press to confirm your selection and use or

to enable the parameter by selecting Yes or to disable

it by selecting No.

• Press to confirm your selection or press

cancel operation.

CONDUCTIVITY CALIBRATIONCONDUCTIVITY CALIBRATION

CONDUCTIVITY CALIBRATION

It is recommended to calibrate the instrument frequently, especially if high accuracy is required.

The conductivity range should be recalibrated:

• Whenever the conductivity probe is replaced.

• At least once a week.

• Before USP measurements.

• After testing aggressive chemicals.

• When calibration reminder is activated (“Conductivity Cal Expired”).

• If the readings are far from the calibration point.

Note:TDS and Resistivity readings are automatically derived from the conductivity readings and no specific

calibration is needed.

OFFSET CALIBRATION

The meter allows the user to calibrate the probe for the offset.

• Set the meter for conductivity range;

• Select the automatic standard recognition (see

Conductivity Setup

Calibration

);

• Leave the dry probe in the air;

• Enter in calibration mode by pressing ;

• Wait to stabilize. The 0.000 µS calibration point will appear on the screen;

• Press to finish the probe offset calibration.

• Press to exit calibration mode or continue calibration in the other standard solutions.

Note: The offset calibration can be performed only if it is perfomed first (no other calibration points present).

Clear the old calibration if it is present.

CELL CONSTANT CALIBRATION (in solution)

Single Point Calibration

• Select the single point calibration (see

Conductivity Setup

Calibration

);

• Pour a small quantity of the standard solution into a clean beaker. If possible, use plastic beakers to

minimize any EMC interferences.

• For accurate calibration and to minimize cross-contamination, use two beakers for each standard solution.

One for rinsing the probe and one for calibration.

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