Hanna-instruments HI 4521 Manual de usuario descargar pdf (Pagina 27)

To edit the Custom Buffers:

• Use

or to select the

Calibration

option.

• Press and use or to highlight the

Edit Custom Buffers

option.

• For a previous set value, press to set the custom buffer value

to “----” if desired and confirm the setting by pressing ,

otherwise press to edit the selected custom buffer.

• While in edit custom buffer menu press to set the

custom buffer value to 7.000 pH and then use or

to set the desired custom buffer value.

• Press to exit custom buffer edit menu. If the Saving Confirmation is enabled, press to

accept the modified option, to escape without saving or to return to the editing mode.

Otherwise, the modified option is saved automatically.

• Use key to select the next custom buffer to be set or press to return to Calibration options.

Edit Buffer Group

Accessing this option the user can edit the desired group of five pH buffers for automatic buffer recognition

(Automatic Buffer Entry Type). If the Buffer Group already contains five pH buffers, at least one pH buffer has to

be removed in order to add another buffer.

To set the Buffer Group:

• Use or to select the

Calibration

option.

• Press and use or to highlight the

Edit Buffer Group

option.

• Press and use and to choose the

pH buffer to be included in the buffer group.

• Press or to add / remove the selected pH

buffer to / from the buffer group.

• Press

to return to Calibration options and to save the changes.

Make sure the instrument has been calibrated before taking resistivity measurements.

DIRECT MEASUREMENT

To measure the resistivity of a sample using the

Direct

reading

mode:

• Press and then to select resistivity mea-

sure mode.

• Select the

Direct

reading mode (see

Resistivity

Setup

section).

• Proceed as for the conductivity measurement (see

Conductivity

Measurement

section).

DIRECT/AUTOHOLD MEASUREMENT

To measure resistivity of a sample using the

Direct / AutoHold

reading

mode:

• Select the

Direct / AutoHold

reading mode (see

Resistivity Setup

section).

• Proceed as for the conductivity measurement. (see

Conductivity

Measurement

section)

RESISTIVITY MEASURERESISTIVITY MEASURE

RESISTIVITY MEASURE

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Hanna-instruments HI 4521 Manual de usuario Pagina 27

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