Hanna Instruments HI 93703 User Manual

Page 4

The meter is housed in 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 5-minutes of non-use. This fea-
ture is disabled when the meter is connected to
the serial port of the computer.

All operations can be carried out with only five
keys and troubleshooting functions can be
performed with displayed error code guides.

A 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.

Two or three point calibration (0,10, 500 FTU*)
can be easily performed using available stan-
dards, and the last calibration date is auto-
matically stored for future retrivial.

We have chosen 10 FTU * as the standard
calibration point because it best fits the
water turbidity measurements in different
applications, from drinking water to waste-
water treatment.

HANNA instruments

uses the primary stan-

dard AMCO-AEPA-1 to avoid all formazine-
related problems. Formazine is a toxic, un-
stable 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 93703-11 can be used with both standards.

* 1 FTU = 1 NTU

Battery replacement must only take place in a
safe area and using 1.5V AA alkaline batteries.

To install or replace the
batteries, turn the unit off
and remove the battery
compartment cover on the
raer of the meter.

Insert the new batteries
while paying attention to
the polarity.

After the batteries have been installed, close the
battery cover and make sure the gasket is in
place before tightening the 2 screws, to ensure
a watertight seal.

1.5V

SCREW

POTS

PC CONNECTION

To communicate with the instrument through
the HI 92000 software, use the HI 920011 cable
(optional) to connect a serial port of your com-
puter to the 5 pin connector of the meter.
When connected the meter will maintain full
functionality, being able to perform a data trans-
fer while the meter is being operated.

Notes:
• Serial communication is not allowed when the

meter is being calibrated.

• The auto shut-off feature is also disabled when

the meter is connected to a computer.