Hanna Instruments hi 93751 User Manual
ON
OFF
ZERO
MEASUREMENT PROCEDURE
• Turn the meter on by
pressing ON/OFF.
• When the LCD displays
"- - -", it is ready.
• Fill a cuvet up to 1.5 cm
(¾") below the rim with
10 mL of unreacted
sample and replace the
cap.
10 mL of unreacted
sample and replace the
cap.
• Place the cuvet into the
holder and ensure that
the notch on the cap is
positioned securely into
the groove.
the notch on the cap is
positioned securely into
the groove.
• Press ZERO and "SIP" will appear on the display.
• Wait for a few seconds
and the display will show
"-0.0-". Now the meter
is zeroed and ready for
measurement.
"-0.0-". Now the meter
is zeroed and ready for
measurement.
• Remove the cuvet.
• Add the content of one
packet of HI 93751-0
reagent
reagent
• Shake very gently for 1
minute.
• Reinsert the cuvet into
the instrument.
• Press READ TIMED and the display will show the count-
down prior to the measurement or, alternatively, wait
for 5 minutes and press READ DIRECT. In both cases
"SIP" will appear during measurement.
for 5 minutes and press READ DIRECT. In both cases
"SIP" will appear during measurement.
• The instrument directly displays concentration in mg/L of
sulfate on the Liquid Crystal Display.
INTERFERENCES
Color or suspended matter in large amounts will interfere:
suspended matter should be removed by previous filtration.
Organic matter in large amounts may impede the precipita-
tion of barium sulfate.
suspended matter should be removed by previous filtration.
Organic matter in large amounts may impede the precipita-
tion of barium sulfate.
Calcium (as CaCO
3
)
>20000 mg/L
Chloride (as Cl
-
)
>40000 mg/L
Magnesium (as MgCO
3
)
>10000 mg/L
Silica (as SiO
2
)
>500 mg/L
READ
TIMED
The instruction listed below should be carefully followed
during testing to ensure best accuracy.
• Do not touch the cuvet walls with hands.
• In order to maintain the same conditions during the
during testing to ensure best accuracy.
• Do not touch the cuvet walls with hands.
• In order to maintain the same conditions during the
zeroing and the measuring phases, it is necessary to
close the cuvet to prevent any contamination.
close the cuvet to prevent any contamination.
• Do not let the test sample stand too long after reagent
is added or accuracy will be affected.
• Whenever the cuvet is placed into the measurement cell,
it must be completely free of fingerprints, oil or dirt.
Wipe it thoroughly with HI 731318 or a lint-free cloth
prior to insertion.
Wipe it thoroughly with HI 731318 or a lint-free cloth
prior to insertion.
• It is important that the sample does not contain any
debris. This would corrupt the readings.
• It is possible to take multiple readings in a row, but it
is recommended that a zero reading be taken for each
sample and that the same cuvet is used for zeroing and
measurement.
sample and that the same cuvet is used for zeroing and
measurement.
• It is important to discard the sample immediately after
the reading is taken because the glass might become
permanently stained.
permanently stained.
• Shaking the cuvet can generate bubbles in the sample,
causing higher readings. To obtain accurate measure-
ments, remove such bubbles by swirling or by gently
tapping the vial.
ments, remove such bubbles by swirling or by gently
tapping the vial.
• All the reaction times reported in this manual are
referred to 20°C (68°F). As a general rule of thumb,
they should be doubled at 10°C (50°F) and halved at
30°C (86°F).
they should be doubled at 10°C (50°F) and halved at
30°C (86°F).
Battery replacement must only take place in a non-hazard-
ous area using a 9V alkaline battery.
Simply slide off the battery cover on the back of the meter.
Detach the battery from the terminals and attach a fresh
9V battery while paying attention to the correct polarity.
Replace the battery and the cover.
ous area using a 9V alkaline battery.
Simply slide off the battery cover on the back of the meter.
Detach the battery from the terminals and attach a fresh
9V battery while paying attention to the correct polarity.
Replace the battery and the cover.
9V
SLIDE
OFF
Recommendations for Users
Before using these products, make sure that they are entirely suitable for
the environment in which they are used.
Operation of these instruments in residential area could cause unaccept-
able interferences to radio and TV equipments, requiring the operator to
take all necessary steps to correct interferences.
Any variation introduced by the user to the supplied equipment may
degrade the instruments' EMC performance.
To avoid damages or burns, do not perform any measurement in micro-
wave ovens.
Before using these products, make sure that they are entirely suitable for
the environment in which they are used.
Operation of these instruments in residential area could cause unaccept-
able interferences to radio and TV equipments, requiring the operator to
take all necessary steps to correct interferences.
Any variation introduced by the user to the supplied equipment may
degrade the instruments' EMC performance.
To avoid damages or burns, do not perform any measurement in micro-
wave ovens.
REAGENT SETS
HI 93751-01
Reagents for 100 tests
OTHER ACCESSORIES
HI 710009
Blue rubber boot
HI 710010
Orange rubber boot
HI 721310
9V battery (10 pcs)
HI 731318
Tissue for wiping cuvets (4 pcs)
HI 731321
Glass cuvets (4 pcs)
HI 731325
Caps for cuvets (4 pcs)
HI 93703-50
Cuvets cleaning solution (230 mL)
IST93751R2
09/03
12
3
6
9
1’
Operational Guide
Tips for an Accurate Measurement
Battery Replacement
Accessories
CE Declaration of Conformity
1
0
m
L