17
HELP MODE
The
HI88713
bench‑top Turbidity meter offers an interactive contextual help that assists the user
at any moment.
To access help screens, just press
HELP
.
A screen with additional information will appear. To read
all available information, scroll down or up text using the
UP
or
DOWN
key.
Press the “
Support
” key to access a list of the Hanna
Instruments support centers and their contact information.
Press the “
Accessories
” key to view a list of the instru‑
ments accessoies.
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 previous screen.
MEASUREMENT PROCEDURE
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 prevent spillage of the sample from spilling the instrument.
• Always close the cuvette cover during measurement.
• To prevent contamination of the optical system, do not use too mush silicon oil.
To take turbidity measurements:
• Turn the instrument ON by pressing ON/OFF.
When dashes are displayed on the LCD, the
instrument is ready. The current time appears
in the upper left corner of the display and the
mode name appears on the right side of the
LCD, in the message line.
• Fill a clean, dry cuvette with 10 mL of sample
up to the mark, only handle the cuvette by the
top.
