User Guide

4
HI 93703 is a portable turbidity meter with the
mark, in compliance with the European
directives, ensuring low emission values and
accurate measurements in presence of
electromagnetic fields.
The meter is housed in a rugged and lightweight
case, with an easy-to-read LCD. To save bat-
tery-life, the instrument is equipped with an
automatic shut-off feature which is activated
after 4-minutes of non-use.
The meter is very simple to use. All operations
can be carried out with only four keys and
trouble-shooting functions can be performed
with displayed error code guides. An exclusive
positive-locking system guarantees that the
cuvet is firmly placed in the cell. The keypad is
water-resistant and can be wiped with a moist
cloth for quick cleanups.
The one-point calibration at 10 FTU* can be
easily performed using the available stan-
dard. In addition, HI 93703 is the first por-
table turbidity meter that allows to store the
last calibration date and to retrieve it at the
user’s convenience.
Hanna Instruments has chosen 10 FTU * as
the calibration point because it is the value
that best fits the water turbidity measure-
ments in different applications, from drink-
ing water to wastewater treatment.
Hanna Instruments uses the primary standard
AMCO-AEPA-1 to avoid all formazine-related
problems. Formazine is a very toxic, unstable
substance, which requires particular care: its
standards have to be prepared only a few
minutes before performing the calibration, and
cannot be reused because of their short life.
Hanna Instruments standards are extremely
stable, can be reused, and last up to six
months, if free from contamination. HI 93703
can be used with both standards.
* 1 FTU = 1 NTU