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There are eight keys for the different
operationals modes. The large Liquid Crystal
Display is dual-level: the upper level has four
digits and can display the measured param-
eter in hundredths. The lower level has three
characters and indicates current mode (e.g.
F CL for free chlorine or TR for turbidity).
Different LCD segments indicate low battery,
logging mode, date, time, etc.
A pure green LED has been utilized as a light
source for both turbidimetric and colorimetric
measurements. A silicon photocell is used to
receive transmitted light from colorimetric chan-
nel while another photocell receives scattered
light from the turbidimetric (nephelometric)
channel.
In order to measure colorimetric parameters,
all the operator has to do is zero the blank
sample and then add 1 packet of reagent (for
Bromine, Chlorine, Cyanuric Acid, Iodine and
Low Range Iron) or 0.2 mL of Phenol Red (for
pH). After placing the cuvet back in the meter
and pressing READ, the measurements are
shown directly on the LCD.
The instrument operates with four AA batter-
ies and may be operator-programmed to turn
itself off automatically after 10, 20, 30, 40, 50
or 60 minutes of inactivity.
HI 93102 and all accessories such as sample
vials, reagent pillows, primary standards, can
be easily stored in the optional carrying case.
GENERAL DESCRIPTION
The Hanna HI 93102 is a portable micropro-
cessor driven, multiparameter, turbidity and
ion specific meter. It measures Free & Total
Chlorine, Cyanuric Acid, pH, Iodine, Bromine,
Low Range Iron and Turbidity.
In the colorimetric mode, the user can select
either factory preprogrammed calibration set-
tings or calibrate the meter using customized
calibration values based on the concentration
or relative absorbance of the sample. Calibra-
tion data is also stored in a non-volatile
EEPROM.
In the turbidity mode, periodic recalibration of
the meter with primary standards according
to regulatory requirements or personal experi-
ence is suggested. Turbidity ranges are 0.00-
9.99 NTU and 10.0-50.0 NTU.
HI 93102 complies with G.L.P. Standards
(Good Laboratory Practice), that is:
• When switched on, the LCD displays all
segments (display check).
• Battery status is monitored during every
measurement cycle warning the user if the
batteries become weak.
In addition, HI 93102 will turn itself off
before low voltage causes erroneous read-
ings.
• It utilizes a real time clock and recalls
calibration data such as date, time and
calibration values.
To facilitate field tests, the meter provides a
logging mode. In this mode, the user can
store up to twenty five time-tagged measure-
ments in RAM and scroll the memory at any
time.
