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The
HI 95715
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 LED light source 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
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 LED (Light Emitting Diode) 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 95715
meter measures the ammonia nitrogen (NH
3
-N) content in water samples in the
0.00 to 9.99 mg/L (ppm) range. The method is an adaptation from
ASTM Manual of Water and
Environmental Technology, D1426-93
, Nessler Method.
The reagents are in
liquid form and are supplied in bottles. The amount of reagent is precisely
dosed to ensure the maximum repeatability.
GENERAL DESCRIPTION
ABBREVIATIONS
American Society for Testing and Materials
degree Celsius
degree Fahrenheit
Liquid Crystal Display
Light Emitting Diode
milligrams per liter. mg/L is equivalent to ppm (part per million)
milliliter
ASTM:
°C
:
°F
:
LCD:
LED:
mg/L
:
mL
:
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
Standards HI 95715-11 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 "715" on
the LCD.
