Hanna Instruments HI 98331 User Manual

Instruction Manual

EC & TEMP

Soil Test

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Soil Test

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Soil Test

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HI 98331

Direct Soil Conductivity &

Temperature Meter

www.hannainst.com

WARRANTY

HI 98331 is warranted for one year against defects
in workmanship and materials when used for its
intended purpose and maintained according to in­structions. The probe is warranted for a period of
six months. This warranty is limited to repair or
replacement free of charge.

Damage due to accidents, misuse, tampering or lack
of prescribed maintenance is 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 packed for complete protection.

Dear Customer,
Thank you for choosing a Hanna product. This
manual will provide you with the necessary informa­tion for a correct operation. Please read it carefully
before using the meter.
If you need additional technical information, do not
hesitate to e-mail us at

This instrument is in compliance with

[e-mail]

[e-mail].

[e-mail]

directives.

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and
examine it carefully. If any damage has occurred
during shipment, immediately notify your Dealer or
the nearest Hanna Customer Service Center.

Each meter is supplied with:

• HI 73331 Penetration conductivity probe

• 4 x 1.5V batteries

• Calibration screwdriver

Note: Conserve all packing material until the instru-

ment has been observed to function correctly.
Any defective item must be returned in its
original packing.

US DESIGN PATENTUS DESIGN PATENT

US DESIGN PATENT

US DESIGN PATENTUS DESIGN PATENT

D462,024D462,024

D462,024

D462,024D462,024

GENERAL DESCRIPTION

HI 98331 is a special pocket meter expressly designed
to directly measure soil conductivity. The meter also
measures temperature, and the conductivity readings
are compensated for temperature with a sensor incor­porated in the HI 73331 penetration probe.

The probe is interchangeable, and it can be easily
replaced by the user.

The conductivity range can be calibrated at one
point, and the meter has been designed to be cali­brated in liquid.

Hanna Instruments reserves the right to modify the design, con­struction and appearance of its products without advance notice.

FUNCTIONAL DESCRIPTION

1. Battery compartment

2. Liquid Crystal Display (LCD)

3. ON/OFF button

4. TEMP button

5. HI 73331 Direct soil conductivity penetration
probe

6. Incorporated temperature sensor in tip of probe

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.

ISTR98331 12/05

SPECIFICATIONS

CALIBRATION

BATTERY REPLACEMENT

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OPERATIONAL GUIDE

Taking measurements

Connect the HI 73331 probe. The meter requires the
probe in order to do any measurement. Press the
ON/OFF button to turn the meter ON. Place the
probe to the desired depth and saturate the soil if
needed. The conductivity value, automatically com­pensated for temperature, will be shown on the LCD.

The meter displays conductivity in mS/cm, which is
equivalent to dS/m.

Pressing the TEMP button, the temperature measured
by the probe will be shown while the button is held.

Note: Before taking any measurement make sure the

meter has been calibrated.

For better accuracy, frequent calibration of the instru-

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ment is recommended. In addition, the instrument
must be recalibrated whenever:

a) The conductivity probe is replaced.

)mc/Sm00.2ot00.0(mc/Sm50.0±

b) When high accuracy is required.

)mc/Sm00.4ot00.2(mc/Sm03.0±

c) At least once a month.

Calibration procedure

Immerse the tip of the probe in a beaker with HI 70031P
1413 µS/cm solution. The tip of the probe should be
about 2” deep in the liquid. The probe should be
kept at least 1” from the walls and the bottom of the
beaker. Adjust the trimmer to read 1.41 on the LCD.

CALIBRATION

To change the batteries, remove the 4 screws located on
the top of the meter.

Once the top has been removed, carefully replace the 4
batteries located in the compartment while paying atten­tion to their polarity.

Replace the top, making sure that the gasket is properly
seated in place, and tighten the screws to ensure a
watertight seal.

ACCESSORIES

HI 73331 Direct soil penetration conductivity probe
HI 7031M 1413 µS/cm (1.4 mS/cm) @25ºC cali-

HI 7031L 1413 µS/cm (1.4 mS/cm) @25ºC cali-

HI 731326 Calibration screwdriver, 20 pieces

bration solution, 230 mL bottle

bration solution, 460 mL bottle

PROBE MAINTENANCE

The HI 73331 probe is very easy to use. The only
precaution to be taken is to clean the area surrounding
the connector before removing the probe, in order to
avoid dirtying the connector.

TROUBLESHOOTING

• Batteries must be changed whenever the readings are
erratic, the LCD is dim, or the meter loses calibration.

• The meter cannot measure neither conductivity nor
temperature without the HI 73331 probe.

Recommendations for Users

Before using this product, make sure that it is entirely suit­able for the environment in which it is used. Operation of this
instrument in residential areas could cause unacceptable
interferences to radio and TV equipment.
Avoid touching the probes at all times.
Any variation introduced by the user to the supplied equip­ment may degrade the instrument’s EMC performance.
To avoid electrical shock, do not use this instrument when
voltages at the measurement surface exceed 24 VAC or 60
VDC. To avoid damages or burns, do not perform any mea­surement in microwave ovens.