Hanna Instruments HI 93706 - Manual (Page 2)

MEASUREMENT PROCEDURE
• Turn the meter on by pressing
ON/OFF.
• When the LCD displays “- - -”,
it is ready.
• Fill the cuvet with 10 mL of
unreacted sample, up to the
mark, and replace the cap.
• Place the cuvet 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
display will show “-0.0-”. Now
the meter is zeroed and ready
for measurement.
• Remove the cuvet.
• Add 10 drops of HI 93706A-0
Phosphorus Reagent A to the
cuvet.
• Add the content of one packet
of HI 93706B-0 Phosphorus
Reagent B to the cuvet.
ON
OFF
ZERO
READ
TIMED
12
3
6
9
5’
READ
DIRECT
• Replace the cap and shake
gently until dissolution is
complete.
• Reinsert the cuvet into the
instrument.
• Press READ TIMED and the display will show the
countdown prior to the measurement or, alternatively,
wait for 5 minutes and press READ DIRECT. In both
cases “SIP” will appear during measurement.
• The instrument directly displays concentration in mg/L of
phosphorus on the Liquid Crystal Display.
INTERFERENCES
Interference may be caused by:
Sulfide
Chloride above 150000 mg/L as Cl
–
Calcium above 10000 mg/L as CaCO
3
Magnesium above 40000 mg/L as CaCO
3
Ferrous iron above 100 mg/L.
Color or suspended matter in large amounts will cause
interference. Therefore the turbidity should be removed by
prior filtration.
HI 93707 - Nitrite Low Range HI 93707 - Nitrite Low Range HI 93707 - Nitrite Low Range HI 93707 - Nitrite Low Range HI 93707 - Nitrite Low Range
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
measurements, 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).
Battery replacement must only take place in a non-hazardous
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 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.
REAGENT SETS
HI 93706-01 Reagents for 100 tests
HI 93706-03 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).
Operational Guide Tips for an Accurate Measurement Accessories
CE Declaration of Conformity
Battery Replacement
Read the relevant SDS sheets before performing the test.
Safety Data Sheets are available at: www.hannainst.com
Safety Data Sheets
10 mL
x 10