The instruction listed below should be carefully followed
during testing to ensure best accuracy.
• It is important that the sample does not contain any
debris. This would corrupt the readings.
• Each time the cuvet is used, the cap must be tightened
to the same degree.
• Whenever the cuvet is placed into the measurement cell,
it must be dry outside and completely free of fingerprints,
oil or dirt. Wipe it thoroughly with
HI 731318
or a lint-
free cloth prior to insertion.
• 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 cuvet.
• Do not let the reacted sample stand too long after
reagent is added or accuracy will be lost.
• It is possible to take multiple readings in a row, but it
is recommended to take a new zero reading for each
sample and to use the same cuvet is used for zeroing
and measurement.
• After the reading it is important to discard immediately
the sample, otherwise the glass might become permanently
stained.
• 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-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.
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.
ACCESSORIES
ACCESSORIES
ACCESSORIES
ACCESSORIES
ACCESSORIES
REAGENT SETS
HI 93732-01
Reagents for 100 tests
HI 93732-03
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)
HI 740038
60 mL glass bottle with stopper
CE DECLARATION
CE DECLARATION
CE DECLARATION
CE DECLARATION
CE DECLARATION
OF CONFORMITY
OF CONFORMITY
OF CONFORMITY
OF CONFORMITY
OF CONFORMITY
IST93732R2 09/03
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 one 60 mL glass bottle
completely with the
unreacted sample.
• Replace the cap and ensure
that a small part of the
sample spills over.
• Remove the cap and add 5
drops of HI 93732A and 5
drops of HI 93732B.
• Add some more sample, to fill the bottle completely.
Replace the cap again and ensure that a part of the
sample spills over. This is to make sure that no air
bubbles have been trapped inside, which would corrupt
the reading.
• Invert several times the
bottle. The sample becomes
orange-yellow and a
flocculant agent will appear.
• Let the sample stand and
the flocculant agent will start
to settle.
• After approximately 2
minutes, when the upper
half of the bottle becomes
limpid, add 10 drops of HI
93732C.
ON
OFF
• Replace the cap and invert
the bottle until dissolution
of the settled flocculant is
complete. The sample is
ready for measurement when
it is yellow and completely
limpid.
• Fill the cuvet up to the
mark with 10 mL of the
unreacted (original) sample,
and replace the cap. This is
the blank.
• Place the cuvet into the older
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.
• Fill another cuvet up to the
mark with 10 mL of the
reacted sample and replace
the cap.
• Reinsert the cuvet into the
instrument.
• Press READ and “SIP” will appear during measurement.
• The instrument directly displays the concentration of dissolved
oxygen in mg/L on the Liquid Crystal Display.
x 10
10 mL
ZERO
9V
SLIDE
OFF
INTERFERENCES
Interferences may be caused by reducing and oxidizing
materials.
x 5
x 5
