Hanna Instruments HI 8064 User Manual

Instruction Manual

HI 8064

Portable Thermohygrometer

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Dear Customer,
Thank you for choosing a Hanna product.
Please read this instruction manual carefully
before using the instrument.
This manual will provide you with all the neces­sary information for the correct use of the
instrument.
If you need additional technical support, do not
hesitate to e-mail us at [e-mail]
This instrument is in compliance with the CE
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, immediately
notify your Dealer.

Note: Save all packing material until you are

sure that the instrument functions cor­rectly. All defective items must be re­turned in their original packing with the
supplied accessories.

TABLE OF CONTENTS

Preliminary Examination ............................ 3

General Description.................................... 3

Specifications ............................................ 4

Functional Description................................ 4

Relative Humidity Calibration ...................... 5

Temperature Calibration ............................. 7

Taking measurements................................ 7

Relative Humidity Calibration Table............. 8

Warranty .................................................. 10

Hanna Products ....................................... 11

GENERAL DESCRIPTION

With a simple rotary switch measuring both
relative humidity and temperature, HI 8064 is an
easy-to-operate thermohygrometer specially
dedicated to education.
Just turn the dial from off to RH% for relative
humidity or °C for temperature, and the large
LCD will show the appropriate measured value
in seconds.
The probe handle contains the amplification
circuitry to ensure an accurate and linear read­ing throughout the range. The probe tip is
perforated to allow air circulation and thus
guarantee a fast response time. To measure
humidity electronically, a thin film polymer ca­pacitance is used.
The probe handle is made of tough ABS material
to withstand the wear and tear of everyday use.
Weighing less than a pound with battery life of
one hundred hours and a response time of less
than half a minute, HI 8064 is ideal for use in
schools, libraries, museums and horticulture.

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SPECIFICATIONS

RH CALIBRATION

Range 10.0 to 95.0% RH

0.0 to 60.0°C

Resolution 0.1% RH / 0.1°C
Accuracy ±2% RH / ±0.4°C
Response Time 6 seconds for 95% accuracy
RH Calibration Manual, 2 point, through

trimmers on the RH probe

Environment 0 to 50°C (32 to 122°F);

RH max 98% non-condensing

Battery Type 1 x 9V, alkaline
Battery Life Approx. 100 hours of use
Dimensions 180 x 83 x 40 mm

(7.1 x 3.3 x 1.6'')

Weight 180 g (6.3 oz.)

FUNCTIONAL DESCRIPTION

• OFF position: the instrument is OFF; any
other knob position turn the instrument ON.

• ºC position: the meter is in temperature
measurement mode.

• RH% position: the meter is operating in
Relative Humidity measurement mode.

• Replacing battery: when the battery level is
low and only a few hours of working life are
left, the "V" symbol will appear on the
display to warn the user that the battery
needs to be replaced.
Remove the battery compartment rear cover
on the rear of the instrument and replace
the battery with a new one, while paying
attention to the correct polarity.

The HI 8064 thermohygrometer is factory cali-
brated, but it is recommended to periodically
control the calibration status of the meter.

Use the HI 7601 calibration kit composed of a
container with two separate chambers, each
one equipped with a threaded plug and three
envelops containing the necessary salts.

Preparing the calibration solutions

• Pour approximately 26 cc of distilled water
into a glass container.

• Immerse the container in a bath of ice and
water, and shake briefly. Then add slowly the
contents of an envelope containing LiCl to the
container while continuing to shake.

When the salt has completely dissolved, add
the contents of the second envelope.

• Allow the solution to cool, and then pour it into
the chamber marked "RH 11.1%", making
sure that no residue remains on the walls of
the glass container.

Note: When not in use, carefully seal the

chamber as the LiCl solution is ex­tremely hygroscopic and tends to cap­ture the air humidity causing the solution
to expand slowly until it overflows from
the container.

• Pour approximately 26 cc of distilled water
into the other chamber (marked "RH 75.4")
and add the contents of the envelope contain­ing NaCl, while shaking the container to avoid
any lump formation.

Note: When not in use, carefully seal the

container.

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Calibration procedure

• Bring the calibration kit to a temperature of
approximately 20 ºC.

• Remove the plug from the chamber contain­ing the LiCl solution and insert the probe.

• Remove the adhesive sticker which covers
the calibration trimmer access holes.

• Wait for the reading to stabilize (this will take
a few hours) and then turn the "Low humidity
trimmer" (the one nearest to the probe con­nection cable) until the value of 11.1% RH will
be displayed on the LCD.

• Remove the probe and tightly seal the cham­ber containing the LiCl solution.

• Remove the plug from the second chamber
and insert the probe.

• Wait for the reading to stabilize and then note
the displayed value.

• By using the Calibration Table (pages 8-9),
find the displayed readout value on column
"A" and the corresponding RH value of col­umn "B", to which the meter has to be brought
by acting on the "High humidity trimmer".

• Adjust the "High humidity trimmer" (the one
opposed to the connection cable) until the
required value is displayed on the LCD.

• Finally adjust the "Low humidity trimmer" until
the value of 75.4% RH will be displayed on the
LCD.

TEMPERATURE CALIBRATION

The HI 8064 thermohygrometer is factory cali-
brated and therefore usually it requires no fur­ther intervention by the user.

If recalibration is desired, proceed as follows:

• Remove the adhesive sticker which covers the
calibration trimmer access holes.

• Insert the probe into a recipient in which air
heated at a temperature of 50 ºC has been
forced to circulate.

• Insert a thermometer with an accuracy of 0.1
ºC into the same recipient.

• Read the temperature value on the thermom­eter.

• Adjust the temperature calibration trimmer
(the central trimmer) until the measured tem­perature value is displayed on the LCD.

TAKING MEASUREMENTS

• For a rapid response, expose the end of the
humidity detector to an air current moving at
more than 0.5 m/second.

In absence of air movement, the response
can be speeded up by shaking the probe.

• If condensed drops form upon the surface of
the humidity sensors, turn the instrument off
and wait until this undesired water has com­pletely evaporated. To speed up the evapora­tion process, expose the humidity sensors to
an air current.

• If the meter is used in dusty surroundings, the
filter must be kept on at all time.

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RELATIVE HUMIDITY

CALIBRATION TABLE

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WARRANTY

All Hanna Instruments meters are warranted
for two years against defects in workman-

ship and materials when used for their in­tended purpose and maintained according to
the instructions. The probes are warranted
for a period of six months.
Damages due to accident, misuse, tamper­ing or lack of prescribed maintenance are not
covered. This warranty is limited to repair or
replacement free of charge.
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 charge
for repair or replacement. If the instrument is
to be returned to Hanna Instruments, obtain
a Return Goods Authorization from the Cus­tomer Service Department first and then send
it with shipment cost prepaid. When shipping
any instrument, make sure it is properly pack­aged for complete protection.

HANNA PRODUCTS

• CALIBRATION & MAINTENANCE SOLUTIONS

• CHEMICAL TEST KITS

• CHLORINE METERS

• CONDUCTIVITY/TDS METERS

• DISSOLVED OXYGEN METERS

• HYGROMETERS

• ION SPECIFIC METERS

• MAGNETIC STIRRERS

• Na/NaCl METERS

• pH/ORP/Na ELECTRODES

• PROBES (DO, µS/cm, RH, T, TDS)

• PUMPS

• REAGENTS

• SOFTWARE

• THERMOMETERS

• TITRATORS

• TRANSMITTERS

• TURBIDITY METERS

• Wide Range of Accessories

Most Hanna meters are available in the following formats:

• BENCH-TOP METERS

• POCKET-SIZE METERS

• PORTABLE METERS

• PRINTING/LOGGING METERS

• PROCESS METERS (Panel- and Wall-mounted)

• METERS FOR FOOD INDUSTRY

All rights are reserved. Reproduction in whole
or in part is prohibited without the written
consent of the copyright owner.

Hanna Instruments reserves the right to modify

the design, construction and appearance of its

products without advance notice.

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For additional information, contact your dealer or
the nearest Hanna Customer Service Center.

You can also e-mail us at [e-mail]

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SALES & TECHNICAL SERVICE

Australia:

Tel. [phone] • Fax [phone]

China:

Tel. [phone] • Fax [phone]

Egypt:

Tel. & Fax [phone]

Germany:

Tel. [phone] • Fax [phone]

Greece:

Tel. [phone] • Fax [phone]

Indonesia:

Tel. [phone] • Fax [phone]

Japan:

Tel. [phone] • Fax [phone]

Korea:

Tel. [phone] • Fax [phone]

Malaysia:

Tel. [phone] • Fax [phone]

Singapore:

Tel. [phone] • Fax [phone]

South Africa:

Tel. [phone] • Fax [phone]

Taiwan:

Tel. [phone] • Fax [phone]

Thailand:

Tel. [phone] • Fax [phone]

United Kingdom:

Tel. [phone] • Fax [phone]

USA:

Tel. [phone] • Fax [phone]

For e-mail contacts and complete list of Sales and
Technical offices, please see www.hannainst.com

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MAN8064R1 08/05