4
* 1 FTU = 1 NTU
The meter housing is a rugged and lightweight case, with an
easy-to-read LCD.
To save battery-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 troubleshooting functions can be performed with
displayed error code guides.
An exclusive positive-locking system guarantees that the cuvette 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 standard. In addition, HI 93703
is the first
portable 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
measurements in different applications, from drinking 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.
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