ON
OFF
MEASUREMENT PROCEDURE
• Turn the meter on by
pressing ON/OFF.
• When the LCD displays
"- - -", it is ready.
• Fill one cuvet with 10 mL
of sample up to 1.5 cm
(¾") below the rim and
replace the cap.
• Place the cuvet 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.
• Wait for a few seconds and
the display will show "-0.0-".
Now the meter is zeroed and
ready for measurement.
• Fill one graduated mixing
cylinder up to the 25 mL mark
with the sample.
• Add the content of one packet of HI 93730A-0 Reagent
A, close the cylinder and invert several times until the
powder is completely dissolved.
ZERO
READ
TIMED
12
3
6
9
5’
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).
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 93730-01
Reagents for 100 tests
HI 93730-03
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
CE Declaration of Conformity
Accessories
Read the relevant SDS sheets before performing the test.
Safety Data Sheets are available at: www.hannainst.com
Safety Data Sheets
10 mL
25 ml
• Add the content of one packet of HI 93730B-0 Reagent
B to the cylinder, close it and invert several times until the
powder is completely dissolved.
• Add the content of one packet of HI 93730C-0 Reagent
C to the cylinder, close and shake it vigorously.
• Fill an empty cuvet with 10 mL of the reacted sample up
to 1.5 cm (¾") below the rim, replace the cap and insert
the cuvet into the instrument.
• Press READ TIMED and the display will show the countdown
prior to the measurement, or, alternatively wait for 5
minutes and press READ DIRECT. In both cases "SIP" will
appear during measurement.
• The instrument directly displays concentration in mg/L of
molybdenum on the Liquid Crystal Display.
INTERFERENCES
Interference may be caused by:
Aluminum above 50 mg/L
Chromium above 1000 mg/L
Copper above 10 mg/L
Iron above 50 mg/L
Nickel above 50 mg/L
Nitrite, as NO
2
–––––
Sulfate above 200 mg/L
Highly buffered samples or with extreme pH may exceed the
buffering capacity of the reagents.