Hanna Instruments HI 8751 User Manual

Instruction Manual

HI 8751 • HI 8752

HI 8753

Electronic Thermometers

for Education

www.hannainst.com

Dear Customer,
Thank you for choosing a HANNA instruments® product.
Please read this instruction manual carefully before using the instrument.
The manual will provide you with the necessary information for a correct use.
If you need additional technical support, do not hesitate to e-mail us at

[e-mail]

These instruments are in compliance with the CE directives.

WARRANTY

All Hanna Instruments meters are warranted for two years against defects
in workmanship and materials when used for their intended purpose and
maintained according to instructions. Probes are warranted for 6 months.

This warranty is limited to repair or replacement free of charge.
Damages due to accidents, 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 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.

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

TABLE OF CONTENTS

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it carefully to
make sure that no damage has occurred during shipment. If noticeable
damage is found, immediately notify your dealer.

Each meter is supplied complete with:

• Temperature probe with 1 m (3.3') cable:

- HI 765PW for HI 8751

- HI 765BL for HI 8752 and HI 8753

• 9V battery

• Instruction manual

Note: Save all packing material until you are sure that the instrument

functions correctly. Any defective item must be returned in the original
packing with the supplied accessories.

GENERAL DESCRIPTION

The HI 8751, HI 8752 and HI 8753 electronic thermistor thermometers can measure
temperature in the low ranges (-40 to 150°C or -58 to 338°F) with high accuracy.

These thermometers use a miniature silicon sensor and are precalibrated at the factory
to measure a wide temperature range without the need to change probes.

This type of sensor is highly accurate with a very fast response time.
The sensor is housed in a rugged, stainless steel probe. This probe can be replaced

without requiring recalibration.
A wide variety of interchangeable temperature probes (HI 765 series) for measure-

ments in liquids, air and semisolids are available.

PRELIMINARY EXAMINATION ..................................................................... 3

GENERAL DESCRIPTION ............................................................................. 3

FUNCTIONAL DESCRIPTION & SPECIFICATIONS OF HI 8751 ....................... 4

FUNCTIONAL DESCRIPTION & SPECIFICATIONS OF HI 8752 ....................... 5

FUNCTIONAL DESCRIPTION & SPECIFICATIONS OF HI 8753 ....................... 6

OPERATIONAL GUIDE ................................................................................ 7

CALIBRATION ............................................................................................ 7

BATTERY REPLACEMENT ............................................................................. 8

TEMPERATURE PROBES & ACCESSORIES..................................................... 9

CE DECLARATION OF CONFORMITY........................................................... 10

Hanna Instruments reserves the right to modify the design, construction and

appearance of its products without advance notice.

32

FUNCTIONAL DESCRIPTION & SPECIFICATIONS

OF HI 8751

FUNCTIONAL DESCRIPTION & SPECIFICATIONS

OF HI 8752

1) Probe connector

2) Liquid Crystal Display

3) OFF mode

4) Measurement mode, °C scale

5) Rotary switch

Range –40.0 to 150.0°C
Resolution 0.1°C
Accuracy ±0.5% F.S. for one year, excluding probe error
Typical EMC Deviation ±1°C with HI 765PW probe
Probe HI 765PW stainless steel, 1 m (3.3') cable (included)
Battery Type / Life

1 x 9V (IEC 6LR61) / approx. 300 hours of continuous use

Environment 0 to 50°C (32 to 122°F);

RH max 95% non-condensing

Dimensions 180 x 83 x 40 mm (7.1x3.3x1.6")
Weight 265 g (9.3 oz.)

1) Probe connector

2) Liquid Crystal Display

3) OFF mode

4) Measurement mode, °F scale

5) Rotary switch

Range –58 to 338°F
Resolution 1°F
Accuracy ±0.5% F.S. for one year, excluding probe error
Typical EMC Deviation ±2°F with HI 765BL probe
Probe HI 765BL stainless steel, 1 m (3.3') cable (included)
Battery Type / Life

1 x 9V (IEC 6LR61) / approx. 300 hours of continuous use

Environment 0 to 50°C (32 to 122°F);

RH max 95% non-condensing

Dimensions 180 x 83 x 40 mm (7.1x3.3x1.6")
Weight 265 g (9.3 oz.)

54

OFF

°C

OFF

°C

FUNCTIONAL DESCRIPTION & SPECIFICATIONS

OF HI 8753

1) Probe connector

2) Liquid Crystal Display

3) OFF mode

4) Measurement mode, °C scale

5) Measurement mode, °F scale

6) Rotary switch

Range –40.0 to 150.0°C / -58 to 338°F
Resolution 0.1°C / 1°F
Accuracy ±0.5% F.S. for one year, excluding probe error
Typical EMC Deviation ±3°C / ±6°F

with HI 765BL probe
Probe HI 765BL stainless steel, 1 m (3.3') cable (included)
Battery Type / Life

1 x 9V (IEC 6LR61) / approx. 300 hours of continuous use

Environment 0 to 50°C (32 to 122°F);

RH max 95% non-condensing

Dimensions 180 x 83 x 40 mm (7.1x3.3x1.6")
Weight 265 g (9.3 oz.)

OPERATIONAL GUIDE

Each meter is supplied complete with a 9V battery. Remove the battery cover
from the back of the thermometer, insert the battery and reattach the cover.

Connect the temperature probe to the probe socket on the top of the meter.

°C

To switch the instrument on, turn the rotary switch to
°C or °F position (depending on model).

If a temperature probe is plugged in, the unit will display the measured
temperature.

°C

After use, switch the thermometer off by turning the
rotary switch to OFF.

CALIBRATION

All HANNA instruments® thermometers have been accurately pre-calibrated at
the factory. It is generally recommended to have all thermometers recalibrated
at least once a year. For an accurate annual recalibration, contact the nearest
HANNA Customer Service Center.

For a quick and easy check of the meter accuracy,
HANNA instruments® offers a series of CALIBRATION
TEST KEYS to be connected to the probe socket on
the thermometer.

If the reading differs more than ±0.4°C (±0.8°F) from the test key value, the
unit is due for recalibration.

Choose the test key that better fits your application needs:

HI 765-18C Calibration test key at –18.0°C
HI 765000C Calibration test key at 0.0°C
HI 765070C Calibration test key at 70.0°C
HI 765-004F Calibration test key at – 0.4°F
HI 765032F Calibration test key at 32.0°F
HI 765158F Calibration test key at 158.0°F

°F

°F

76

BATTERY REPLACEMENT

TEMPERATURE PROBES & ACCESSORIES

These instruments are powered by a 9V battery.

When the battery level is too low to ensure reliable readings, the Battery Error
Prevention System (BEPS) automatically shuts down the LCD.

For a correct functioning of the instrument, replace the battery.

To access the battery, remove the battery cover
on the rear of the meter by applying pressure
in the indicated direction.

Replace the battery with a new one and
reattach the cover.

Battery replacement must only take place in a
safe area and using a 9V alkaline battery.

BATTERY

HANNA instruments® offers a wide range of temperature probes for measure­ments in air, surface, liquid and for penetration applications.

These probes use highly sensitive thermistor sensors to provide greater accuracy,
faster response and a temperature range that is superior to conventional
thermistor probes.

HI 765 series of temperature probes are supplied pre-calibrated at the factory
and ready to use, making it possible to switch from one to another without
needing time-consuming and tedious calibration procedures.

Different handle colors are available to avoid cross contamination during testing.

HI 765A Air/gas probe with 1 m (3.3') cable and white handle
HI 765A/10 Air/gas probe with 10 m (33') cable and white handle
HI 765BL General purpose/liquid probe, 1 m (3.3') cable & black handle
HI 765BL/10 General purpose/liquid probe, 10 m (33') cable & black handle
HI 765L General purpose/liquid probe, 1 m (3.3') cable & white handle
HI 765L/10 General purpose/liquid probe, 10 m (33') cable & white handle
HI 765PBL Penetration probe with 1 m (3.3') cable and blue handle
HI 765PBL/10 Penetration probe with 10 m (33') cable and blue handle
HI 765PG Penetration probe with 1 m (3.3') cable and green handle
HI 765PG/10 Penetration probe with 10 m (33') cable and green handle
HI 765PR Penetration probe with 1 m (3.3') cable and red handle
HI 765PR/10 Penetration probe with 10 m (33') cable and red handle
HI 765PW Penetration probe with 1 m (3.3') cable and white handle
HI 765PW/10 Penetration probe with 10 m (33') cable and white handle
HI 765W Wire probe without handle for hard-to-reach places, 1 m (3.3')

cable

HI 765W/10 Wire probe without handle for hard-to-reach places, 10 m (33')

cable

OTHER ACCESSORIES

HI 710002 Soft carrying case
HI 710009 Shockproof rubber boot, blue
HI 710010 Shockproof rubber boot, orange
HI 721316 Rugged carrying case

98

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 areas could cause unacceptable interference to radio
and TV equipment.

Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC
performance.

To avoid electrical shock, do not use these instruments when voltage at the measurement surface
exceeds 24 Vac or 60 Vdc.

To avoid damages or burns, do not perform any measurement in microwave ovens.

1110

SALES AND TECHNICAL SERVICE CONTACTS

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

MANTHER R4 09/05