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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 cuvette back in the meter
and pressing READ, the measurements are shown directly on the LCD.
The instrument operates with four AA batteries 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 microprocessor 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 settings or calibrate the meter using
customized calibration values based on the concentration or relative
absorbance of the sample. Calibration 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
experience 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 readings.
• 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 measurements
in RAM and scroll the memory at any time.
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 parameter 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 channel while another
photocell receives scattered light from the turbidimetric (nephelometric)
channel.
