Hanna Instruments HI 93704 - Manual (Page 2)

• Turn the meter on by
pressing ON/OFF.
• When the LCD displays
“- - -”, it is ready.
• Fill one cuvet with 10 mL
of unreacted sample, up
to the mark.
• Fill a second cuvet with
10 mL of distilled water,
up to the mark (this is the
blank).
ZERO
READ
TIMED
12
3
6
9
12’
READ
DIRECT
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 93704-01 Reagents for 100 tests
HI 93704-03 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).
ON
OFF
10 mL
sample
10 mL
blank
Operational Guide
Battery Replacement
CE Declaration of Conformity
Accessories Tips for an Accurate Measurement
Read the relevant SDS sheets before performing the test.
Safety Data Sheets are available at: www.hannainst.com
Safety Data Sheets
MEASUREMENT PROCEDURE
• Add 12 drops of the HI 93704-0 reagent to each cuvet.
Replace the caps and swirl the solutions.
• Place the blank into the
holder and ensure that the
notch on the cap is
positioned securely into
the groove.
• Press READ TIMED and the display will show the
countdown prior to zeroing the blank. Alternatively wait
for 12 minutes and press ZERO. In both cases “SIP” will
appear during zeroing.
blank
• Wait for a few seconds and
the display will show
“-0.0-”. Now the meter
is zeroed and ready for
measurement.
• Remove the blank.
• Insert the cuvet with the
reacted sample into the
instrument.
sample
• Press READ DIRECT and “SIP” will appear during
measurement.
• The instrument directly displays concentration in µg/L of
hydrazine on the Liquid Crystal Display.
INTERFERENCES
Highly colored samples
Highly turbid samples
Aromatic amines
Presence of oxidizing agents will reduce the concentration of
hydrazine.