Hanna Instruments HI 96745 Instruction Manual

Dear Customer,
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Thank you for choosing a Hanna Instruments product. Please read this
Melrose, MA 02176
instruction manual carefully before using these instruments. This manual
Phone 781-665-1400
will provide you with the necessary information for correct use of these
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instruments, as well as a precise idea of their versatility.
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Preliminary examination:

Please examine this product carefully. Make sure that the instrument is
not damaged. If any damage occured during shipment, please notify
your Dealer.
Each HI 96745 Ion Selective Meter is supplied complete with:
• Two Sample Cuvettes and Caps
• 9V Battery
• Instruction Manual
Note: save all packing material until you are sure that the instrument
INSTRUCTION MANUAL
HI 96745 HI 96745 HI 96745 HI 96745 HI 96745
pH, Chlorine, Hardness
Range
and Iron LR
ISM
Resolution
Accuracy
Typical EMC Dev. ±0.1 pH
Light Source
Light Detector
Method For pH: Phenol red method. The reaction with reagents
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Functional description:

works correctly. Any defective item must be returned in its original
packing.
For more details about spare parts and accessories
see "Accessories".

Technical specifications:

pH 6.5 to 8.5
Free Cl 0.00 to 5.00 mg/L
2
Total Cl 0.00 to 5.00 mg/L
2 1. RANGE/GLP/ key: press to change the paramter, press and hold
Mg Hardness 0.00 to 2.00 mg/L
Ca Hardness 0.00 to 2.70 mg/L
Total Hardness 0.00 to 4.70 mg/L
2. CAL CHECK key: press to perform the validation of the meter, or
Iron LR 0.00 to 1.60 mg/L
0.1 pH
3. ZERO/CFM key: press to zero the meter prior to measurement, to
0.01 mg/L under 3.50 mg/L Cl
2
0.10 mg/L above 3.50 mg/L Cl
2
0.01 mg/L Hardness
4. READ/ /TIMER key: In measurement mode , press to make a
0.01 mg/L Iron LR
pH ±0.1 pH @ 25°C
Free Cl ±0.03 mg/L ±3% of reading @ 25°C
2
Total Cl ±0.03 mg/L ±3% of reading @ 25°C
5. ON/OFF key: to turn the meter on and off.
2
Mg Hardness ±0.11 mg/L ±5% of reading @ 25°C
6. Liquid Crystal Display (LCD)
Ca Hardness ±0.11 mg/L ±5% of reading @ 25°C
7. Cuvette alignment indicator
Iron LR ±0.01 mg/L ±8% of reading @ 25°C
8. Cuvette holder
±0.01 mg/L Cl
DISPLAY ELEMENTS DESCRIPTION:
2
±0.02 mg/L Mg Hardness
±0.02 mg/L Ca Hardness
±0.01 mg/L Iron LR
Tungsten lamp
Silicon Photocell with narrow band interference
filter @ 525 nm
causes a red tint in the sample.
For Cl : Adaptation of the USEPA method and Standard
1. The measuring scheme (lamp, cuvette, detector), appears during
2
Method 4500-Cl G. The reaction with reagents causes a
pink tint in the sample.
2. Error messages and warnings
For hardness: Adaptation of the Standard Methods for the
3. The battery icon indicates the change state level of the battery
Examination of Water and Wastewater, 18 th Edition, colo-
4. The hourglass appears when an internal check is in progress
rimetric method. The reaction between Mg/Ca and reagents
5. Status messages
causes a violet tint in the sample.
For Iron LR: Adaptation of the TPTZ method. The reaction between
iron and the reagent causes a violet tint in the sample.
Environment 0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Battery Type 1 x 9 volt
Auto-Shut off After 10' of non-use in measurement mode;
after 1 hour of non-use in calibration mode;
with last reading reminder.
Dimensions 192 x 104 x 69 mm (7.6 x 4.1 x 2.7")
Weight 360 g (12.7 oz.)
for three seconds to enter GLP mode . In calibration mode press to edit
the date and time.
press and hold for three seconds to enter calibration mode .
confirm edited values or to confirm factory calibration restore.
measurement, or press and hold for three seconds to start a pre-
programmed countdown prior to measurement. In GLP mode press to
view the next screen.
different phases of zero or reading measurement
6. The chronometer appears when the reaction timer is running
7. The month, day and date icons appear when a date is displayed
8. Four digit main display
9. Measuring units
10. Four digit secondary display

Errors and warnings:

ON ZERO READING:
Light High: There is too much light to perform
a measurement. Please check the preparation of
the zero cuvette.
Light Low: There is not enough light to perform
a measurement. Please check the preparation of
the zero cuvette.
No Light: The instrument cannot adjust the
light level. Please check that the sample does
not contain any debris.
ON SAMPLE READING:
Inverted cuvettes: The sample and the zero
cuvette are inverted.
Zero: A zero reading was not taken. Follow the
instructions of the measurement procedure for
zeroing the meter.
Under range: A blinking "0.00" indicates that
the sample absorbs less light than the zero
reference. Check the procedure and make sure
you use the same cuvette for reference (zero)
and measurement.
Over Range: A flashing value of the maximum
concentration indicates an over range condition.
The concentration of the sample is beyond the
programmed range: dilute the sample and
re-run the test.
DURING CALIBRATION PROCEDURE:
Standard Low: The standard reading is less
than expected.
Standard High: The standard reading is higher
than expected.
OTHER ERRORS AND WARNINGS:
Cap error: Appears when external light enters
in the analysis cell. Assure that the cuvette cap
is present.
Cooling lamp: The instrument waits for the
lamp to cool down.
Battery low: The battery must be replaced
soon.
Dead battery: This indicates that the battery
is dead and must be replaced. Once this
indication is displayed, normal operation of the
instrument will be interrupted. Change the
battery and restart the meter.

Measurement procedure:

Measurement 1• Turn the meter on by pressing ON/OFF.
2• When the beeper sounds briefly and the LCD displays
dashes and "P1" (pH), "P2" (Free Chlorine), "P3"
2
(Total Chlorine), "P4" (Total Hardness) or "P5" (Iron
LR) the meter is ready. The code that appears on the
secondary display is the one of the last selected
parameter. If necessary, press RANGE/GLP/ to
change parameter. The blinking "ZERO" indicates
that the instrument needs to be zeroed first.
3
3• Fill the cuvette with 10 mL of unreacted sample, up to
the mark, and replace the cap.
For Total Hardness: Fill a graduated beaker up to
the 50mL mark with the sample. Add 0.5 mL of
HI 93719A-0 Calcium And Magnesium Reagent
indicator solution and mix. Add 0.5 mL of
HI 93719B-0 Alkali solution for Calcium and
Magnesium and mix. Fill three cuvettes with 10mL
of sample each. Add 1 drop of HI 93719C-0 EDTA
solution to one cuvette, replace the cap and swirl
#1 #2 #3
the solution. This is the ZERO sample. Add 1 drop
of HI 93719D-0 EGTA solution to the second
cuvette, replace the cap and swirl the solution. This
is the READ1 sample.
For Iron LR: Fill one graduated mixing cylinder up
#1 #2
to the 25 mL mark with deionized water. Add the
content of one packet of HI 93746-0 reagent, close
the cylinder and shake well for 30 seconds. This is
the blank.
Fill a cuvette with 10 mL of the blank up to the
mark and replace the cap.
4• Place the cuvette into the holder and ensure that
4 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.
For Total Hardness: Place the ZERO sample into
5-6
the holder and ensure that the notch on the cap is
positioned securely into the groove. Press ZERO/
CFM and the lamp, cuvette and detector icons will
appear on the display, depending on the measurement
phase. After a few seconds the display will show
"-0.0-". Remove the ZERO sample and insert the
READ1 sample into the instrument. Press and hold
READ/ /TIMER for three seconds. The display will
show the countdown prior to measurement. The beeper
is playing a beep at the end of countdown period.
Alternatively, wait for 30 seconds. The lamp, cuvette
and detector icons will appear on the display,
8-9 depending on the measurement phase, then the
instrument will display the level of Magnesium
hardness in mg/L CaCO (together with "n").
3
6• After a few seconds the display will show "-0.0-".
The meter is now zeroed and ready for
or measurement (except for Hardness).
7• Remove the cuvette.
8• Add the specific test reagent for each parameter:
pH: 5 drops of HI 93710-0
Free Chlorine: 1 packet of HI 93701-0
Total Chlorine: 1 packet of HI 93711-0
Total hardness: the third cuvette (nothing is added)
Iron LR: Fill one graduated mixing cylinder up to
the 25 mL mark with the sample.
Add the content of one packet of HI 93746-0 reagent,
close the cylinder and shake well for 30 seconds.
10
Fill a cuvette with 10 mL of the reacted sample up
to the mark and replace the cap.
9• Replace the cap and swirl the solution: for pH invert
11
several times to mix, for free and total chlorine
shake gently 20 seconds.
10• Replace the cuvette into the holder and ensure that
the notch on the cap is positioned securely into the
groove.