Hanna Instruments HI 96761 - Manual (Page 2)

To save 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.
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.
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.
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 96761-11 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 96761-11 Cuvette B into the cuvette
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 96761-11
Cuvettes, A and B are free from fingerprints
or dirt and that they are inserted correctly.
GLP
Battery management
Warranty
HI 96761 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 IST96761 01/11
or
or
Last
Calibration
Date
In the GLP mode, the last calibration date can be verified and the factory
calibration can be restored.
1
2
Factory
Calibration
Restore
Accessories
Warning: do not validate or calibrate the instrument with standard
solutions other than the Hanna CAL CHECK™ Standards, otherwise
erroneous results will be obtained.
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 96761-11 Cuvette A into the cuvette
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 96761-11 Cuvette B into the cuvette
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
REAGENT SET
HI 95761-01
Reagents for 100 tests
HI 95761-03 Reagents for 300 tests
OTHER ACCESORIES
HI 96761-11
CAL CHECK TM 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)
Calibration
3
11-13
14-15
16
17
18
5-6
9-10
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.
8
Use the Hanna CAL CHECK™ cuvettes (see
“Accessories”) to validate or calibrate instruments.
• Alkalinity: above 1,000 mg/L CaCO
3
if present
as bicarbonate (HCO
3
sample pH < 8.3);
above 25 mg/L CaCO
3
if present as carbonate
(CO
3
2- , sample pH > 9.0). In both cases, it
will not reliably developed the full amount of
color or it may rapidly fade (negative error).
To resolve this, neutralize the sample with
diluted HCl.
• Acidity: above 150 mg/L CaCO
3
. May not be
reliably develop the full amout of color or it
may rapidly fade (negative error). To resolve
this, neutralize the sample with diluted
NaOH.
• Hardness: in case of water with hardness
greater than 500 mg/L CaCO
3
, shake the
sample for approximately 2 minutes after
adding the powder reagent.
• Bromine (Br
2
): positive error.
• Ozone (O
3
): positive error.
• Chloride dioxide (ClO
2
): positive error.
INTERFERENCES
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4-5
11
or
7
9
8
2
3-4