Hanna Instruments HI 93738 User Manual
Page 2
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• When the LCD displays "- - -",
it is ready.
• Fill two graduated mixing cylinders (#1 & #2) up to
the 25 mL mark with the sample.
• Add 0.5 mL of HI 93738A-0 Reagent A to each cylinder
(#1 & #2), close them and invert several times to mix.
ON
OFF
ZERO
The instruction listed below should be carefully followed.
• 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 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.
REAGENT SETS
HI 93738-01 Reagents for 100 tests
HI 93738-03 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
#2
25 ml
#1
25 ml
#1 & #2
#1
#2
#1
#2
#1 & #2
#1
• Add the content of one packet
of HI 93738B-0 Reagent B
to one only of the two
cylinders (#1), close it and
invert several times to mix.
This is the blank.
• Add precisely 0.5 mL of HI 93738C-0 Reagent C to
each cylinder (#1 & #2), close them and invert several
times to mix.
• Add 0.5 mL of HI 93738D-0 Reagent D to each cylinder
(#1 & #2), close them and invert several times to mix.
Cylinder #2 is the sample.
#1
#2
#1 & #2
• Fill a cuvet with 10 mL of
the blank (#1) up to 1.5
cm (¾") below the rim and
replace the cap.
• Place the blank (#1) 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.
#1
10 mL
• Wait for a few seconds and
the display will show "-0.0-".
Now the meter is zeroed and
ready for measurement.
• Fill a cuvet with 10 mL of
the reacted sample (#2) up
to 1.5 cm (¾") below the
rim and replace the cap.
• Insert the sample (#2) into
the instrument.
10 mL
#2
• The instrument directly displays concentration in mg/L of
chlorine dioxide on the Liquid Crystal Display.
SAMPLING PROCEDURE
It is recommended to analyze chlorine dioxide samples
immediately upon collection. Chlorine dioxide samples must
be stored in dark, glass stoppered bottles, with minimal
head space. Excessive heat (greater than 25°C/78°F),
agitation and exposure to light must be avoided.
INTERFERENCES
Interferences may be caused by strong oxidants.
#1
#2
• Press READ and "SIP" will appear during measurement.