Hanna-instruments HI 4521 Manual de usuario descargar pdf (Pagina 38)

Analyte Addition

This method is similar to the Known Addition method, with the difference that an aliquot of sample is added to a

standard of known concentration. The sample and standard contain the same ion to be measured. The ion

concentration is then calculated using the difference in mV potential.

Analyte Subtraction

In the Analyte Subtraction method an aliquot of sample is added to a standard of known concentration, reacting

with the ion to be measured. The stoichiometric ratio between standard and sample must be known. The ion

concentration is then calculated using the difference in mV potential. The method is especially usefull when there

is no available ISE for the measured ion.

To set the Reading Mode:

• Use or to select the

Reading Mode

option.

• Press and use or to highlight the

desired option.

• Press to confirm your selection or press

cancel operation.

Temperature – See

pH Setup

section.

Note: The Temperature Compensation option is also included in the Temperature parameter.

Temperature Compensation

This option allows the user to enable / disable the temperature compensation for the measurement of Ion

concentration.

To set the Temperature Compensation:

• Use or to select the

Temperature

option.

• Press and use or to highlight the

Temperature Compensation

option.

• Press and use or to enable / disable

the Temperature Compensation.

The Resistivity Setup menu allows the user to set the parameters related with the resistivity measurements.

Accessing Resistivity Setup

• Press while in

Measure

mode and then to

select resistivity range.

• Press and then to access

Resistivity Setup

menu.

To access a

Resistivity Setup

option:

• Use or to select the desired option.

• Press to confirm your selection.

The following is a description of the Resistivity Setup option

screens.

Profile - see

Conductivity Setup

section.

RESISTIVITYRESISTIVITY

RESISTIVITY

SETUP SETUP

SETUP

Reading Mode

This option allows the user to select between

Direct

and

Direct/AutoHold

resistivity reading modes.

To set the

Reading Mode:

• Use or to select the

Reading Mode

option.

• Press and use or to highlight the

desired option.

• Press to confirm your selection or press to

cancel operation.

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Hanna-instruments HI 4521 Manual de usuario Pagina 38

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