Hanna Instruments HI 93706 User Manual

Instruction Manual

HI 93706

Phosphorus ISM

www.hannainst.com

Warranty

HI 93706 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 [e-mail].

This instrument is in compliance with directives.

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 93706 meter measures the phosphorus content in
water and wastewater in the 0.0 to 15.0 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 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.

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

SPECIFICATIONS

Range 0.0 to 15.0 mg/L
Resolution 0.1 mg/L
Accuracy ±0.3 mg/L ±4% of reading
Typical EMC ±0.2 mg/L

Deviation
Light Source Light Emitting Diode @ 470 nm
Method Adaptation of the Standard Methods

for the Examination of Water and
Wastewater (18th edition), amino acid

method. The reaction between
phosphorus and reagents causes 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 0 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight 290 g (10 oz.)

REQUIRED REAGENTS

Code Description Quantity

HI 93706A-0 Molybdate 10 drops
HI 93706B-0 Amino Acid Powder 1 packet

REAGENT SETS

HI 93706-01 Reagents for 100 tests
HI 93706-03 Reagents for 300 tests

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.

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.

E

Operational Guide Tips for an Accurate Measurement Accessories

• Replace the cap and shake
gently until dissolution is

MEASUREMENT PROCEDURE

• Turn the meter on by pressing
ON/OFF.

• When the LCD displays “- - -”,
it is ready.

• Fill the cuvet with 10 mL of
unreacted sample, up to the

10 mL

mark, 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.

OFF

ON

complete.

• Reinsert 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.

5’

12

9

READ

TIMED

READ

DIRECT

3

6

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

REAGENT SETS

HI 93706-01 Reagents for 100 tests
HI 93706-03 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

the reading is taken because the glass might become

ZERO

• The instrument directly displays concentration in mg/L
of phosphorus on the Liquid Crystal Display.

permanently stained.

• Shaking the cuvet can generate bubbles in the sample,
causing higher readings. To obtain accurate

• Wait for a few seconds and the
display will show “-0.0-”. Now
the meter is zeroed and ready
for measurement.

• Remove the cuvet.

• Add 10 drops of HI 93706A-0
Phosphorus Reagent A
(Molybdate) to the cuvet.

• Add the content of one packet
of HI 93706B-0 Phosphorus
Reagent B (Amino Acid) to the
cuvet.

x 10

INTERFERENCES

Interference may be caused by:
Sulfide
Chloride above 150000 mg/L as Cl
Calcium above 10000 mg/L as CaCO
Magnesium above 40000 mg/L as CaCO
Ferrous iron above 100 mg/L.
Color or suspended matter in large amounts will cause

interference. Therefore the turbidity should be removed by
prior filtration.

HI 93707 - Nitrite Low RangeHI 93707 - Nitrite Low Range

HI 93707 - Nitrite Low Range

HI 93707 - Nitrite Low RangeHI 93707 - Nitrite Low Range

–

3

3

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

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.

IST93706R5 09/03