Hanna Instruments HI 96724 - Manual

1. GLP/ key: press to enter GLP mode. In calibration mode press to
edit the date and time.
2. CAL CHECK key: press to perform the validation of the meter, or
press and hold for three seconds to enter calibration mode.
3. ZERO/CFM key: press to zero the meter prior to measurement, to
confirm edited values or to confirm factory calibration restore.
4. READ/ key: In measurement mode, press to make a measurement.
In GLP mode press to view the next screen.
5. ON/OFF key: to turn the meter on and off.
6. Liquid Crystal Display (LCD)
7. Cuvette alignment indicator
8. Cuvette holder
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DISPLAY ELEMENTS DESCRIPTION:
INSTRUCTION MANUAL
HI 96724 HI 96724 HI 96724 HI 96724 HI 96724
Free & Total Chlorine ISM
w w w . h a n n a i n s t . c o m
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 96724 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
works correctly. Any defective item must be returned in its original
packing.
For more details about spare parts and
accessories see “Accessories”
Dear Customer,
Thank you for choosing a Hanna product. This manual will provide you
with the necessary information for the correct use of the instrument. Please
read it carefully before using the meter. If you need additional technical
information, do not hesitate to e-mail us at [email protected].
Technical specifications:
Range 0.00 to 5.00 mg/L of Cl
2
(Free or Total)
Resolution 0.01 mg/L (0.00-3.50 mg/L);
0.10 mg/L (above 3.50 mg/L)
Accuracy ±0.03 mg/L ±3% of reading @ 25°C
Typical EMC Dev. ±0.01 mg/L
Light Source Tungsten lamp
Light Detector Silicon Photocell with narrow band interfer-
ence filter @ 525 nm
Method Adaptation of USEPA method 330.5 and
Standard Method 4500-Cl G.
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 102 x 67 mm (7.6 x 4 x 2.6”)
Weight 290 g (10 oz.).
Functional description:
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.
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.
Standard Low: The standard reading is less
than expected.
Standard High: The standard reading is higher
than expected.
Errors and warnings:
Measurement procedure:
1• Turn the meter on by pressing ON/OFF.
2• When the beeper sounds briefly and the LCD
displays dashes, the meter is ready. The
blinking “ZERO” indicates that the
instrument needs to be zeroed first.
3• Fill the cuvette with 10 mL of unreacted
sample, up to the mark, and replace the
cap.
4• Place the cuvette 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 measurement.
7• Remove the cuvette.
8• For free chlorine measurement: add 3
drops of HI 93701A-F (DPD1 indicator) and
3 drops of HI 93701B-F (DPD1 buffer) to
an empty cuvette. Swirl gently to mix, and
immediately add 10 mL of unreacted sample.
Replace the cap and shake gently.
For total chlorine measurement: add 3
drops of HI 93701A-T (DPD1 indicator), 3
drops of HI 93701B-T (DPD1 buffer) and
1 drop of HI 93701C-T (DPD3 solution) to
an empty cuvette. Swirl gently to mix, and
immediately add 10 mL of unreacted sample.
9• Replace the cap and shake gently for about
10 seconds relatively.
10•Immediately replace the cuvette into the cuvette
holder and ensure that the notch on the cap
is positioned securely into the groove.
11•For free chlorine measurement: press
READ/ and the lamp, cuvette and
detector icons will appear on the display,
depending on the measurement phase.
For total chlorine measurement: wait
for 2’ and 30’’ and press READ/
. The
lamp, cuvette and detector icons will appear
on the display, depending on the
measurement phase.
Measurement
1. The measuring scheme (lamp, cuvette, detector), appears during
different phases of zero or reading measurement
2. Error messages and warnings
3. The battery icon shows the charging level of the battery
4. The hourglass appears when an internal checking is in progress
5. Status messages
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
ON ZERO READING:
ON SAMPLE READING:
DURING CALIBRATION PROCEDURE:
OTHER ERRORS AND WARNINGS:
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, the meter will lock up.
Change the battery and restart the meter.
Cooling lamp: The instrument waits for the
lamp to cool down.
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