Hanna Instruments HI 95729 - Manual (Page 4)

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The HI 95729 is an auto diagnostic portable microprocessor meter that benefits from Hanna’s
years of experience as a manufacturer of analytical instruments. It has the advanced optical
system based on a special tungsten lamp and a narrow band interference filter that allows most
accurate and repeatable readings. All instruments are factory calibrated and the electronic and
optical design minimizes the need of frequent calibration.
With the powerful CAL CHECK
TM validation function you are able to validate good performance
of your instrument at any time. The validation procedure is extremely user friendly. Just use the
exclusive Hanna ready-made, NIST traceable standards to verify the performance of the
instrument and recalibrate if necessary.
All instruments are splash proof and the lamp and filter units are protected from dust or dirt by
a transparent cup. This makes the instruments fulfill field applications. Display codes aid the
user in routine operation. The meter has an auto-shut off feature that will turn off the instrument
after 10 minutes of non use or after 1 hour if left in the
calibration mode.
The meter uses an exclusive positive-locking system to ensure that the cuvet is in the same
position every time it is placed into the measurement cell. It is designed to fit a cuvet with a
larger neck making it easier to add both sample and reagents. The cuvet is made from special
optical glass to obtain best results.
The
HI 95729 meter measures the Fluoride Fluoride Fluoride Fluoride Fluoride content in the 0.00 to 2.00 mg/L (ppm) range,
in drinking, surface and waste waters. The method is an adaptation of the EPA method 340.1
and Standard Methods for the Examination of Water and Wastewater, 20 th edition, SPADNS
method.
The reagent is in
liquid form and is supplied in bottles. The amount of reagent is precisely dosed
by use of the supplied automatic pipette to ensure the maximum repeatability.
degree Celsius
degree Fahrenheit
Environmental Protection Agency (USA)
Liquid Crystal Display
milligrams per liter. mg/L is equivalent to ppm (part per million)
milliliter
Sodium 2-(parasulfophenylazo)-1,8-dihydroxy-3,6-naphthalene disulfonate °C:
°F:
EPA:
LCD:
mg/L:
mL:
SPADNS:
GENERAL DESCRIPTION
ABBREVIATIONS
17
or
• Press READ/TIMER and “SIP” will blink during
measurement.
• The instrument will show for three seconds the
CAL CHECK standard value.
Then the date of last calibration (e.g.:
“01.08”) appears on the display, or “01.01”
if the factory calibration was selected. In both
cases the number of the month is blinking,
ready for date input.
Note: if the display shows “ERR” the calibration
procedure failed. Verify that the CAL CHECK
TM
Standards HI 95729-11 Cuvets, A and B, are
free from fingerprints or dirt and that they are
inserted correctly.
DATE INPUT
• Keep READ/TIMER pressed to scroll to the
desired month number (01-12).
• When the correct month has been set, press
ZERO to confirm. Now the display will show
the day number blinking. Keep READ/TIMER
pressed to scroll to the desired day number
(01-31).
Note: it is possible to change from day to
month and vice versa by pressing ZERO.
• When both the day and month have been
selected, hold CAL CHECK for three seconds to
store date and calibration values. The instrument
will show for one second “Stor”, to confirm
that the new calibration data has been accepted.
• The instrument will return automatically to the
measurement mode by displaying "729" on
the LCD.