ON
OFF
MEASUREMENT PROCEDURE
• Turn the meter on by pressing
ON/OFF.
• When the LCD displays "- - -",
it is ready.
• Fill one graduated mixing
cylinder up to the 20 mL mark
with the sample.
• Add the content of one packet of HI 93731A-0 Zinc
Reagent A, close the cylinder and invert several times to
mix until dissolution is complete
dissolution is complete
dissolution is complete
dissolution is complete
dissolution is complete.....
• Fill one cuvet with 10 mL of the reacted sample up to
1.5 cm (¾") below the rim.
• Replace the cap. Insert the cuvet
into the cell and ensure that
the notch on the cap is
positioned securely into the
groove.
• Press ZERO and “SIP” will appear on the display.
ZERO
• Wait for a few seconds and the
display will show “-0.0-”.
Now the meter is zeroed and
ready for measurement.
• Remove the cuvet from the
instrument, open and add 0.5
mL of HI 93731B-0 Zinc
Reagent B Cyclohexanone. This
is the sample.
Note:
To prevent any contamination from the polycarbonate
cap, prior to replacing it, close the sample cuvet with
the supplied HDPE plastic stopper.
• Replace the cap and swirl the
sample for 15 seconds.
• Insert the cuvet into the
instrument.
• 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
zinc on the Liquid Crystal Display.
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).
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 93731-01
Zinc Reagents for 100 tests
HI 93731-03
Zinc 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
20 mL
10 mL
Read the relevant SDS sheets before performing the test.
Safety Data Sheets are available at: www.hannainst.com
Safety Data Sheets
CAUTION:
HI 93731A-0 Zinc Reagent A
contains cyanide.
Cyanide, its solutions and hydrogen
cyanide liberated by acids are very
poisonous!
INTERFERENCES
Interference may be caused by:
Aluminum above 6 mg/L
Cadmium above 0.5 mg/L
Copper above 5 mg/L
Iron above 7 mg/L
Manganese above 5 mg/L
Nickel above 5 mg/L
