Hanna Instruments HI 96736-24 User Manual

Page 2

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).

11•Press READ/ /TIMER. In all cases the

lamp, cuvette and detector icons will

appear on the display, depending on

the measurement phase.

12•For Hardness the instrument will display

the concentration of Calcium in mg/L

CaCO

(together with ‘’C’’). Press READ/

/TIMER

again, the lamp, cuvette

and detector icons will appear on the

display, depending on the measurement

phase. The isntrument will display the

total hardness concentration in mg/L

CaCO

(together with ‘’t’’).

For pH the instrument directly displays the pH measured value.

INTERFERENCES:
• Total Hardness: Excessive amounts of heavy metals.
Note

: If the sample is very acidic, some extra drops of HI 93735B

buffer reagent may be added.

Use the Hanna CAL CHECK™ cuvettes (see
“Accessories”) to validate or calibrate instruments.

Validation and Calibration procedures

VALIDATION
Note:

The validation is performed only for

the selected parameter. For full vali-
dation of the instrument, the following

procedure must be performed for each

parameter.

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 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.

Validation

Calibration

ALIBRATION

Note:

It is possible to interrupt the calibra-

tion procedure at any time by

pressing CAL CHECK or ON/OFF keys.
When calibrating, only the selected

range is affected.

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• To change the range, simply press

RANGE/GLP

/ .

4• 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.

5• Place the CAL CHECK™ Standard Cuvette A

into the cuvette holder and ensure that the

notch on the cap is positioned securely into

the groove.

6• Press ZERO/CFM and the lamp, cuvette

and detector icons will appear on the

display, depending on the measurement

phase.

7• 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.

8• Remove the cuvette.
9• Place the specific CAL CHECK

Standard

Cuvette B into the cuvette holder, for:
Hardness: B, HI 96719-11
pH: B, HI 96710-11
Ensure that the notch on the cap is
positioned securely into the groove.

7• Place the specific CAL CHECK

Standard

Cuvette B into the cuvette holder, for:
Hardness: B, HI 96719-11
pH: B, HI 96710-11
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.

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.

LAST CALIBRATION DATE

1• Press and hold RANGE/GLP/ for three

seconds 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.

10•Press READ/ /TIMER and the lamp,

cuvette and detector icons will appear on
the display, depending on the measurement
phase.

11•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 Cuvettes, A and B

are free from fingerprints or dirt and that
they are inserted correctly.

12•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.

13•Press RANGE/GLP/ to edit the desired

year (2009-2099). If the key is kept pressed,
the year number is automatically increased.

14•When the correct year has been set, press

ZERO/CFM

or READ/ /TIMER to confirm.

Now the display will show the month blinking.

15•Press RANGE/GLP/ to edit the desired

month (01-12). If the key is kept pressed,
the month number is automatically increased.

16•When the correct month has been set, press

ZERO/CFM

or READ/ /TIMER to confirm.

Now the display will show the day blinking.

17•Press RANGE/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.

18•Press ZERO/CFM to save the calibration date.
19•The instrument displays “Stor” for one

second and the calibration is saved.

20•The instrument will return automatically

measurement mode by displaying dashes

on the LCD.

GLP

12-14

15-16

Last

Calibration

Date

GLP mode, the last calibration date can be verified and the factory

calibration can be restored.

FACTORY CALIBRATION RESTORE

It is possible to delete the calibration and restore
factory calibration.

1• Press and hold RANGE/GLP/ for three

seconds 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 RANGE/GLP/
again to abort factory calibration restore.

4• The instrument briefly indicates “donE”

upon restoration of factory calibration prior
to returning to

measurement mode.

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.

Factory

Calibration

Restore

EAGENT SETS

HI 93719-01

Reagents for 100 Hardness tests

HI 93719-03

Reagents for 300 Hardness tests

HI 93710-01

Reagents for 100 pH tests

HI 93710-03

Reagents for 300 pH tests

OTHER ACCESSORIES
HI 96719-11 CAL CHECK

Standard Cuvettes for Hardness (1 set)

(equivalent with 1.00 mg/L Mg Hardness)

HI 96710-11 CAL CHECK

Standard Cuvettes for pH (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

HI 93703-50

Cuvette cleaning solution (230 mL)

Warranty

HI 96736

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

IST96736 11/10A

Accessories

10-11

6-7

4-5

3-4