Hanna Instruments HI 93733 User Manual

Instruction Manual

HI 93733

Ammonia ISM

www.hannainst.com

WARRANTY

HI 93733 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 [e-mail].

This instrument is in compliance with directives
EN 50081-1 and EN 50082-1.

PRELIMINARY 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 DESCRIPTION

The HI 93733 meter measures the ammonium ion (NH
content in water, wastewater and seawater in the 0.0 to 50.0
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 form and are supplied in bottles.
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.

4

SPECIFICATIONS

DISPLAY 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

SPECIFICATIONS

Range 0.0 to 50.0 mg/L
Resolution 0.1 mg/L
Accuracy ±0.5 mg/L ±5% of reading

+

)

Typical EMC ±0.1 mg/L
Deviation

Light Source Light Emitting Diode @ 470 nm
Method Adaptation of the ASTM Manual of Water

and Environmental Technology, D1426­92, Nessler method. The reaction between
ammonia and reagents causes a yellow
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

V

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 93733A-0 Nessler 4 drops (in fresh and

Reagent seawater)

HI 93733B-0 Ammonia 9 mL (in fresh and seawater)

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.

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.

Reagent

OPERATIONAL GUIDE

E

MEASUREMENT PROCEDURE

• 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
reagent, 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.

• 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.

ON

OFF

• Add 4 drops of
HI 93733A-0
reagent. Replace
the cap and swirl
the solution.

• Reinsert 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.

READ

TIMED

• The instrument directly displays concentration in mg/L of
ammonium ion (NH

+

).

4

• To convert the reading to mg/L of ammonia (NH3),
multiply by the factor 0.944. To convert the reading to
mg/L of ammonia nitrogen (NH3-N), multiply by the
factor 0.778.

INTERFERENCES

Interference may be caused by:
Hardness above 1 g/L
Iron
Sulfide
Glycine
Various aliphatic and aromatic amines
Organic chloramines
Acetone
Aldehydes
Alcohols.

ACCESSORIES

• 1 mL syringe

• 1 plastic pipette

TIPS FOR AN ACCURATE

MEASUREMENT

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

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

ACCESSORIES

REAGENT SETS

HI 93733-01 Reagents for 100 tests
HI 93733-03 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 DECLARATION

OF 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.

IST93733R3 10/02