Hanna Instruments HI 93733 - Manual (Page 2)

• Turn the meter on by
pressing ON/OFF.
• When the LCD displays
“- - -”, it is ready.
• Fill a cuvet with 1 mL of
unreacted sample, by means
of the syringe.
• Using the plastic pipette, add
9 mL of HI 93733B-0
Ammonia Reagent B, up to
the 10 mL mark. Place the
cap and swirl the solution
to mix.
• Place the cuvet into the
holder and ensure that the
notch on the cap is
positioned securely into the
groove.
ON
OFF
• Remove the cuvet.
• Add 4 drops of HI 93733A-0
Nessler Reagent.
• Replace the cap and swirl the
solution.
• Reinsert the cuvet into the
instrument.
READ
TIMED
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
REAGENT SETS
HI 93733-01 Reagents for 100 tests Ammonia
HI 93733-03 Reagents for 300 tests Ammonia
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).
ZERO
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.
CE Declaration of Conformity
Read the relevant SDS sheets before performing the test.
Safety Data Sheets are available at: www.hannainst.com
Safety Data Sheets
Accessories Tips for an Accurate Measurement
Battery Replacement
Operational Guide
MEASUREMENT PROCEDURE
• 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.
• Press READ TIMED and the display will show the
countdown prior to the measurement or, alternatively,
wait for 3 minutes and 30 seconds and press READ
DIRECT. In both cases “SIP” will appear during
measurement.
• The instrument directly displays concentration in mg/L of
ammonium ion (NH
4
+ ).
• To convert the reading to mg/L of ammonia (NH
3
),
multiply by the factor 0.944.
• To convert the reading to mg/L of ammonia nitrogen
(NH
3
-N), multiply by the factor 0.776.
INTERFERENCES
Interference may be caused by:
acetone, alcohols, aldehydes, glycine, hardness above 1 g/L,
iron, organic chloramines, sulfide, various aliphatic and
aromatic amines.
ACCESSORIES
• 1 mL syringe with tip
• 1 plastic pipette