Hanna Instruments HI 93729 - Manual (Page 2)

OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/
OFF.
• When the LCD displays "- - -", it is
ready.
• Fill the cuvet up to 1.5 cm (¾")
below the rim with 10 mL of distilled
water.
• Fill the other cuvet up to 1.5 cm
(¾") below the rim with 10 mL of
sample.
• Add to each cuvet 2 mL of HI
93729 SPADNS reagent, re-
place the caps and invert
several times to mix.
• Wait for one minute.
• Place the cuvet with the re-
acted distilled water into the
holder and ensure that 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 dis-
play will show "-0.0-". Now the meter
is zeroed and ready for measure-
ment.
ON
OFF
1.5 cm
1.5 cm
12
3
6
9
1’
ZERO
• Insert the other cuvet with the
reacted sample into the instru-
ment.
• Press READ and "SIP" will appear on the LCD during
measurement.
• The instrument directly displays concentration in mg/L of
fluoride on the Liquid Crystal Display.
Note: With wastewater and seawater samples, before per-
forming any measurement a distillation of the sample
is needed.
INTERFERENCES
Negative interferences may be caused by:
Alkalinity (as CaCO
3
) above 5000 mg/L
Aluminum above 0.1 mg/L
Iron, ferric above 10 mg/L
Positive interferences may be caused by:
Chloride above 700 mg/L
Phosphate, ortho above 16 mg/L
Sodium hexametaphosphate above 1.0 mg/L
Sulfate above 200 mg/L
Highly colored and turbid samples may require distillation
Highly alkaline samples can be neutralized with nitric acid.
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
zeroing and the measuring phases, it is necessary to
close the cuvet to prevent any contamination.
• Do not let the test sample stand too long after reagent
is added or accuracy will be lost.
• 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.
• 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.
• It is important to discard the sample immediately after
the reading is taken because the glass might become
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.
• 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).
TIPS FOR AN ACCURATE TIPS FOR AN ACCURATE TIPS FOR AN ACCURATE TIPS FOR AN ACCURATE TIPS FOR AN ACCURATE
MEASUREMENT MEASUREMENT MEASUREMENT MEASUREMENT MEASUREMENT
BATTERY REPLACEMENT BATTERY REPLACEMENT BATTERY REPLACEMENT BATTERY REPLACEMENT BATTERY REPLACEMENT
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.
9V
SLIDE
OFF
Recommendations for Users
Before using these products, make sure that they are entirely suitable for the environ-
ment in which they are used.
Operation of these instruments in residential area could cause unacceptable 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 microwave ovens.
ACCESSORIES ACCESSORIES ACCESSORIES ACCESSORIES ACCESSORIES
REAGENT SETS
HI 93729-01 Reagents for 100 tests
HI 93729-03 Reagents for 300 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).
CE DECLARATION CE DECLARATION CE DECLARATION CE DECLARATION CE DECLARATION
OF CONFORMITY OF CONFORMITY OF CONFORMITY OF CONFORMITY OF CONFORMITY
IST93729R1 06/98 PRINTED IN PORTUGAL