Hanna Instruments HI 88703 User Manual

Page 18

HELP MODE

The

HI 88703 offers an interactive context help mode that assists the user at any moment.

To access help screens, just press

HELP.

Depending which menu you are in, a screen with
additional information will appear. To read all
available data, scroll down or up the text using the

▲

▼

keys.

Press the

Support key to access a page with Hanna

support centers and their contact details.
Press the

Accessories key to access a page with

instrument accessories.
To exit support or accessories screens press

ESC

and the instrument will return to the previous help
screen.
To exit help mode just press the

HELP key again and the meter will display the previously selected

screen.

MEASUREMENT PROCEDURE FOR RATIO /

NON RATIO TURBIDITY RANGE

When taking turbidity measurements, several basic rules should be followed:
• Always use cuvettes without scratches or cracks because they can cause inaccurate readings.
• Always cap the cuvettes to avoid spillage of the sample into the instrument.
• Always close the lid of the instrument during measurement.
• Do not use too much oil to prevent contamination of the optical system.

To take turbidity measurements, follow the next steps:

• Turn the instrument ON by pressing ON/OFF. When

dashes are displayed on the LCD, the instrument is
ready. The current time appears on the upper left
corner of the display and the range name appears
on the lower right corner.

• Fill a clean, dry cuvette with 10 mL of sample up

to the mark, taking care to handle the cuvette by
the top.

• Replace the cap.