11•
Then the date of last calibration (e.g.:
“01.08.2009”
) appears on the display, or
“01.01.2009”
if the factory calibration
was selected before. In both cases the year
number is blinking, ready for date input.
12•
Press
GLP/
to edit the desired year
(2009-2099). If the key is kept pressed,
the year number is automatically increased.
13•
When the correct year has been set, press
ZERO/CFM
or
READ/ /TIMER
to confirm.
Now the display will show the month
blinking.
14•
Press
GLP/
to edit the desired month
(01-12). If the key is kept pressed, the
month number is automatically increased.
15•
When the correct month has been set,
press
ZERO/CFM
or
READ/ /TIMER
to
confirm. Now the display will show the
day blinking.
16•
Press
GLP/
to edit the desired day
(01-31). If the key is kept pressed, the
day number is automatically increased.
Note:
It is possible to change the editing from
day to year and to month by pressing
READ/ /TIMER.
17•
Press
ZERO/CFM
to save the calibration
date.
18•
The instrument displays “
Stor
” for one
second and the calibration is saved.
19•
The instrument will return automatically
to
measurement mode
by displaying dashes
on the LCD.
R
EAGENT SETS
HI 93728-01
Reagents for 100 tests
HI 93728-03
Reagents for 300 tests
OTHER ACCESSORIES
HI 96786-11
CAL CHECK™ Standard Cuvettes (1 set)
HI 721310
9V battery (10 pcs)
HI 731318
Cloth for wiping cuvettes (4 pcs)
HI 731331
Glass cuvettes (4 pcs)
HI 731335
Caps for cuvettes (4 pcs)
HI 93703-50
Cuvette cleaning solution (230 mL).
Warranty
HI 96786
is warranted for two years against defects in workmanship and
materials when used for its intended purpose and maintained according
to the instructions.
This warranty is limited to repair or replacement free of charge.
Damages due to accident, misuse, tampering or lack of prescribed
maintenance are not covered.
If service is required, contact your dealer. If under warranty, report the
model number, date of purchase, serial number and the nature of the
failure. If the repair is not covered by the warranty, you will be notified
of the charges incurred.
If the instrument is to be returned to Hanna Instruments, first obtain a
Returned Goods Authorization Number from the Customer Service Department
and then send it with shipment costs prepaid. When shipping any
instrument, make sure it is properly packaged for complete protection.
To validate your warranty, fill out and return the enclosed warranty card
within 14 days from the date of purchase.
Recommendations for Users
Before using these products, make sure that they are entirely suitable for your specific application and for
the environment in which they are used.
Operation of these instruments may cause unacceptable interferences to other electronic equipments, this
requiring the operator to take all necessary steps to correct interferences.
Any variation introduced by the user to the supplied equipment may degrade the instrument’s EMC
performance.
To avoid damages or burns, do not put the instrument in microwave oven. For yours and the instrument
safety do not use or store the instrument in hazardous environments.
Hanna Instruments
reserves the right to modify the
design, construction and appearance of its products
without advance notice.
For additional information, contact your
dealer or the nearest
Hanna Customer Service Center.
To find the Hanna Office in your area,
visit our web site
w w w . h a n n a i n s t . c o m
IST96786 12/10
Accessories:
3
Warning:
do not validate or calibrate the instrument with standard
solutions other than the Hanna
CAL CHECK™
Standards, otherwise
erroneous results will be obtained.
For accurate validation and calibration results, please perform tests at
room temperature (18 to 25°C; 64.5 to 77.0°F).
Use the Hanna CAL CHECK™ cuvettes (see
“Accessories”) to validate or calibrate instruments.
Validation and Calibration procedures
VALIDATION
1•
Turn the meter on by pressing
ON/OFF
.
2•
When the beeper sounds briefly and the
LCD displays dashes, the meter is ready.
3•
Place the
CAL CHECK™
Standard
HI 96786-11
Cuvette A into the holder
and ensure that the notch on the cap
is positioned securely into the groove.
4•
Press
ZERO/CFM
and the lamp, cuvette
and detector icons will appear on the display,
depending on the measurement phase.
5•
After a few seconds the display will show
“-0.0-”
. The meter is now zeroed and
ready for validation.
6•
Remove the cuvette.
7•
Place the
CAL CHECK™
Standard
HI 96786-11
Cuvette B into the holder
and ensure that the notch on the cap is
positioned securely into the groove.
8•
Press
CAL CHECK
key and the lamp,
cuvette and detector icons together with
“CAL CHECK”
will appear on the display,
depending on the measurement phase.
Validation
4-5
7
8
9
Calibration
9-10
11-13
or
14-15
or
16
17
LAST CALIBRATION DATE
1•
Press
GLP/
to enter
GLP mode
. The
calibration month and day will appear on
the main display and the year on the
secondary display.
2•
If no calibration was performed, the factory
calibration message,
“F.CAL”
will appear
on the main display and the instrument
returns to
measurement mode
after three
seconds.
GLP
Last
Calibration
Date
In
GLP mode
, the last calibration date can be verified and the factory
calibration can be restored.
Factory
Calibration
Restore
3-4
2
3-4
Battery management
To save the battery, the instrument shuts down after 10 minutes of non-use
in
measurement mode
and after 1 hour of non-use in
calibration mode.
If a valid measurement was displayed before
auto-shut off, the value is displayed when the
instrument is switched on. The blinking
“ZERO”
means that a new zero has to be performed.
One fresh battery lasts for arround 750 measurements, depending on the
light level.
The remaining battery capacity is evaluated at the instrument startup
and after each measurement.
The instrument displays a battery indicator with three levels as follows:
• 3 lines for 100 % capacity
• 2 lines for 66 % capacity
• 1 line for 33 % capacity
• Battery icon blinking if the capacity is under 10 %.
If the battery is empty and accurate measurements can’t be taken any
more, the instrument shows
“dEAd bAtt”
and turns off.
To restart the instrument, the battery must be replaced with a fresh one.
To replace the instrument’s battery, follow the steps:
• Turn the instrument off by pressing
ON/OFF
.
• Turn the instrument upside down and remove the battery cover by
turning it counterclockwise.
• Extract the battery from its location and replace it with a fresh one.
• Insert back the battery cover and turn it clockwise to close.
9•
At the end of the measurement the display
will show the validation standard value.
The reading should be within specifications as
reported on the
CAL CHECK™
Standard
Certificate. If the value is found out of
specifications, please check that the cuvettes
are free of fingerprints, oil or dirt and repeat
validation. If results are still found out of
specifications then recalibrate the instrument.
CALIBRATION
Note:
It is possible to interrupt the calibration
procedure at any time by pressing
CAL
CHECK
or
ON/OFF
keys.
1•
Turn the meter on by pressing
ON/OFF
.
2•
When the beeper sounds briefly and the
LCD displays dashes, the meter is ready.
3•
Press and hold
CAL CHECK
for three seconds
to enter
calibration mode.
The display will
show
“CAL”
during calibration procedure. The
blinking
“ZERO”
asks for instrument zeroing.
4•
Place the
CAL CHECK™
Standard
HI 96786-11
Cuvette A into the cuvette
holder and ensure that the notch on the cap
is positioned securely into the groove.
5•
Press
ZERO/CFM
and the lamp, cuvette
and detector icons will appear on the display,
depending on the measurement phase.
6•
After a few seconds the display will show
“-0.0-”
. The meter is now zeroed and
ready for calibration. The blinking
“READ”
asks for reading calibration standard.
7•
Remove the cuvette.
8•
Place the
CAL CHECK™
Standard
HI 96786-11
Cuvette B into the holder
and ensure that the notch on the cap is
positioned securely into the groove.
9•
Press
READ/ /TIMER
and the lamp,
cuvette and detector icons will appear on
the display, depending on the measurement
phase.
10•
The instrument will show for three seconds
the
CAL CHECK™
standard value.
Note:
If the display shows
“STD HIGH”
, the
standard value was too high. If the
display shows
“STD LOW”
, the standard
value was too low. Verify that both
CAL
CHECK™
Standard
HI 96786-11
Cu-
vettes, A and B are free from fingerprints
or dirt and that they are inserted cor-
rectly.
11•
At the end of measurement, the instrument
directly displays concentration in mg/L of
nitrate on the LCD. To convert the reading
to mg/L of nitrate-nitrogen, multiply by
the factor 0.226.
INTERFERENCES:
Interference may be caused by:
Ammonia and amines, as urea and primary
aliphatic amines. Chloride above 100 mg/
L (negative interference). Chlorine above 2
mg/L (positive interference). Copper (it must
be absent). Iron (III) (positive interference). Strong oxidizing and
reducing substances. Sulfide (it must be absent).
Note
: To ensure accurate results, preform the tests at room
temperature, between 18 °C and 28 °C (65 °F to 83 °F).
For best result
: Intensely colored samples or suspended matter in
large amounts will cause interference. Therefore sample should be
adequately treated before performing the test.
FACTORY CALIBRATION RESTORE
It is possible to delete the calibration and restore
factory calibration.
1•
Press
GLP/
to enter
GLP mode
.
2•
Press
READ/ /TIMER
to enter in the
factory calibration restore screen. The
instrument asks for confirmation of user
calibration delete.
3•
Press
ZERO/CFM
to restore the factory
calibration or press
GLP/
again to
abort factory calibration restore.
4•
The instrument briefly indicates
“donE”
upon restoration of factory calibration prior
to returning to
measurement mode
.
2
1
18
or
11
3
4
5-6
8