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 tech@hannainst.com
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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