Hanna Instruments HI 93731 User Manual
Instruction Manual
HI 93731
Zinc ISM
http://www.hannainst.com
WARRANTYWARRANTY
WARRANTY
WARRANTYWARRANTY
HI 93731 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained
according to instructions.
This warranty is limited to repair or replacement free of charge.
Damages due to accident, misuse, tampering or lack of prescribed
maintenance are not covered.
If service is required, contact the dealer from whom you purchased the
instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not
covered by the warranty, you will be notified of the charges incurred. If
the instrument is to be returned to Hanna Instruments, first obtain a
Returned Goods Authorization Number from the Customer Service department and then send it with shipment costs prepaid. When shipping
any instrument, make sure it is properly packaged for complete protection.
To validate your warranty, fill out and return the enclosed warranty card
within 14 days from the date of purchase.
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895 , USA.
Hanna Instruments reserves the right to modify the design, construction
and appearance of its products without advance notice.
This Instrument is in
Compliance with the CE Directives
Dear Customer,
Thank you for choosing a Hanna product. This manual will
provide you with the necessary information for the correct
operation of the meter. Please read it carefully before using
the meter. If you need additional technical information, do
not hesitate to e-mail us at tech@hannainst.com.
This instrument is in compliance with directives
EN 50081-1 and EN 50082-1.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
Remove the instrument from the packing material and
examine it carefully to make sure that no damage has
occurred during shipment. If there is any damage, notify
your Dealer.
Each Ion Specific Meter is supplied complete with
• 9V Battery
• Two Sample Cuvets and Caps
• One Transport Cap
Note: Conserve all packing material until the instrument
has been observed to function correctly. Any defective
item must be returned in its original packing.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
The HI 93731 meter measures the zinc content in water
and wastewater in the 0.00 to 3.00 mg/L (ppm) range.
The meter uses an exclusive positive-locking system to ensure
that the cuvet is in the same place every time it is placed
into the measurement cell.
The reagents are in liquid and powder form and are
supplied in bottles and in packets. The amount of reagent
is precisely dosed to ensure maximum repeatability.
Display codes aid the user in routine operations.
The meters have an auto-shut off feature that will turn the
instrument off after 10 minutes of non-use.
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
s
ins
Range: 0.00..3.00 ppm
ON
OFF
READ
DIRECT
HI 93731
ZINC
rum n
ZERO
READ
TIMED
e
CUVET HOLDER
CUVET
ALIGNMENT INDICATOR
ON/OFF
ZERO
READ TIMED
READ DIRECT
SPECIFICATIONS
Range 0.00 to 3.00 mg/L
Resolution 0.01 mg/L
Accuracy ±0.03 mg/L ±3% of reading
Typical EMC ±0.01 mg/L
Deviation
Light Source Light Emitting Diode @ 585 nm
Method Adaptation of the Standard Methods for
the Examination of Water and Wastewa-
th
ter, 18
edition, Zincon method. The
reaction between zinc and the reagent
causes a brownish-green to a blue tint in
the sample
Light Detector Silicon Photocell
Environment 0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Battery Type/Life 1 x 9 volt/40 hours
Auto-Shut off After 10' of non-use
Dimensions 180 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight 290 g (10 oz.).
REQUIRED REAGENTS
Code Description Quantity
HI 93731A-0 Reagent A 1 packet
HI 93731B-0 Reagent B 0.5 mL
REAGENT SETS
HI 93731-01 Reagents for 100 tests
HI 93731-03 Reagents for 300 tests
DISPLAY CODE GUIDEDISPLAY CODE GUIDE
DISPLAY CODE GUIDE
DISPLAY CODE GUIDEDISPLAY CODE GUIDE
This indicates that the meter is in a
ready state and zeroing can be performed.
Sampling in Progress. This prompt appears each time the meter is performing
a measurement.
This indicates that the meter is in a
zeroed state and measurement can be
performed.
A zero reading was not taken. Insert a
sample before adding reagent and press
ZERO.
Under range. A blinking "0.00" indicates
that the sample absorbs less light than
the zero reference. Check the procedure
and make sure you use the same cuvet
for reference (zero) and measurement.
Over range. A flashing value higher than
the maximum concentration readable (see
specifications) indicates that the sample
absorbs too much light, meaning that
the concentration is too high. Dilute the
sample.
Light over range. The cuvet is not inserted correctly and an excess ambient
light is reaching the detector. If the cover
is properly installed, then contact your
dealer or the nearest Hanna Customer
Service Center.
Light under range. The zero sample is
too dark for proper zeroing. If this is not
the case, contact your dealer or the
nearest Hanna Customer Service Center.
V
The "V" indicates that the battery voltage is getting low and the battery needs
to be replaced.
This indicates that the battery is dead
and must be replaced.
Note: once this indication is displayed,
the meter will lockup. Change the battery to restart.
OPERATIONAL GUIDEOPERATIONAL GUIDE
E
OPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
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 zinc
reagent, close the cylinder and invert several times to
mix. Take care that all of the reagent is dissolved.
A
• Fill two cuvets with 10 mL
of the reacted sample up to
1.5 cm (¾") below the rim.
1.5 cm
1.5 cm
BLANK
• Replace the cap on one of the
cuvets. This is the blank.
• Place the blank 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.
• Add 0.5 mL of HI 93731B cyclohexanone to the other cuvet. This
will be the sample.
B
SAMPLE
Note: To prevent any contamination from the polycarbon-
ate 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.
SAMPLE
• Remove the blank and insert
the sample 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.
READ
TIMED
• The instrument directly displays concentration in mg/L of
zinc on the Liquid Crystal Display.
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
TIPS FOR AN ACCURATETIPS FOR AN ACCURATE
TIPS FOR AN ACCURATE
TIPS FOR AN ACCURATETIPS FOR AN ACCURATE
MEASUREMENTMEASUREMENT
MEASUREMENT
MEASUREMENTMEASUREMENT
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 REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENT
BATTERY REPLACEMENTBATTERY REPLACEMENT
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
SLID
OFF
ACCESSORIESACCESSORIES
ACCESSORIES
ACCESSORIESACCESSORIES
REAGENT SETS
HI 93731-01 Reagents for 100 tests
HI 93731-03 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).
CE DECLARATIONCE DECLARATION
CE DECLARATION
CE DECLARATIONCE DECLARATION
OF CONFORMITYOF CONFORMITY
OF CONFORMITY
OF CONFORMITYOF CONFORMITY
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.
PRINTED IN PORTUGAL
IST93731R1 11/98
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