Instruction Manual
HI 8751 HI 8752
HI 8753
Portable Thermistor
Thermometers
http://www.hannainst.com
These Instruments are in
Compliance with the CE Directives
Dear Customer,
Thank you for choosing a Hanna Product. Please read this instruction
manual carefully before using the instrument.
The manual will provide you with the necessary information for a
correct use of the instrument, as well as a more precise idea of its
versatility. These instruments are in compliance with the directives
EN 50081-1 and EN 50082-1.
TABLE OF CONTENTS
PRELIMINARY EXAMINATION ....................................................... 2
GENERAL DESCRIPTION ............................................................... 2
FUNCTIONAL DESCRIPTION & SPECIFICATIONS OF HI 8751 ......... 3
FUNCTIONAL DESCRIPTION & SPECIFICATIONS OF HI 8752 ......... 4
FUNCTIONAL DESCRIPTION & SPECIFICATIONS OF HI 8753 ......... 5
OPERATIONAL GUIDE .................................................................. 6
CALIBRATION .............................................................................. 6
BATTERY REPLACEMENT ............................................................... 7
TEMPERATURE PROBES & ACCESSORIES....................................... 8
WARRANTY ............................................................................... 10
CE DECLARATION OF CONFORMITY............................................. 11
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, notify your Dealer.
Note: Save all packing material until you are sure that the instru-
ment functions correctly. Any defective item must be returned
in the original packing with the supplied accessories.
GENERAL DESCRIPTION
The Minitherm HI 8751, HI 8752 and HI 8753 are accurate,
general purpose, thermistor thermometers designed for simplicity of
use. The large LCD provides clear, easy-to-read digits that can be
read at any angle. A rotary knob on the front panel switches the
instrument from the OFF position to the desired measurement range.
HI 8751 measures temperature in Centigrade whereas HI 8752
reads temperature in Fahrenheit and HI 8753 has both ranges
available for measurement.
Each meter comes supplied with the precalibrated and interchangeable HI 765BL temperature probe, a 9V battery and an instruction
manual.
2
FUNCTIONAL DESCRIPTION &
SPECIFICATIONS OF HI 8751
1) Probe connector
2) LCD display
3) OFF mode
4) °C scale
5) Rotary switch
SPECIFICATIONS HI 8751
Range –40.0 to 150.0°C
Resolution 0.1°C
Accuracy ±0.5% F.S., for one year, excluding probe error
(@20°C/68°F)
EMC Typical ±1°C, with HI 765BL probe
Deviation
Display 3½ digit LCD
Battery 9V battery providing 300 hours of continuous operation
Probe HI 765BL precalibrated and interchangeable
(included) stainless steel probe with 1 m (3.3') cable
Environment 0 to 50°C (32 to 122°F);
Dimensions 180 x 83 x 40 mm (7.1x3.3x1.6")
Weight 280 g (10 oz.) with probe
max 95% RH non-condensing
3
FUNCTIONAL DESCRIPTION &
SPECIFICATIONS OF HI 8752
1) Probe connector
2) LCD display
3) OFF mode
4) °F scale
5) Rotary switch
SPECIFICATIONS HI 8752
Range –58 to 338°F
Resolution 1°F
Accuracy ±0.5% F.S., for one year, excluding probe error
(@20°C/68°F)
EMC Typical ±2°F, with HI 765BL probe
Deviation
Display 3½ digit LCD
Battery 9V battery providing 300 hours of continuous operation
Probe HI 765BL precalibrated and interchangeable
(included) stainless steel probe with 1 m (3.3') cable
Environment 0 to 50°C (32 to 122°F);
Dimensions 180 x 83 x 40 mm (7.1x3.3x1.6")
Weight 280 g (10 oz.) with probe
max 95% RH non-condensing
4
FUNCTIONAL DESCRIPTION &
SPECIFICATIONS OF HI 8753
1) Probe connector
2) LCD display
3) OFF mode
4) °C scale
5) °F scale
6) Rotary switch
SPECIFICATIONS HI 8753
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
(@20°C/68°F)
EMC Typical ±3°C / ±6°F, with HI 765BL probe
Deviation
Display 3½ digit LCD with symbols
Battery 9V battery providing 300 hours of continuous operation
Probe HI 765BL precalibrated and interchangeable
(included) stainless steel probe with 1 m (3.3') cable
Environment 0 to 50°C (32 to 122°F);
Dimensions 180 x 83 x 40 mm (7.1x3.3x1.6")
Weight 280 g (10 oz.) with probe
max 95% RH non-condensing
5
OPERATIONAL GUIDE
INITIAL PREPARATION
Remove the battery cover from the back of your thermometer.
Unwrap the battery and connect it to the clips. Insert the battery
and replace the cover.
Connect the temperature probe to the probe socket on the top of the
meter.
To switch on, turn the rotary switch to °C or °F (depending on
model).
If a temperature probe is plugged in, the unit will display the
temperature.
After use, switch your thermometer off by turning the rotary switch to
OFF.
OFF
OFF
°C
°F
°C
°F
CALIBRATION
All Hanna Instruments thermometers have been accurately precalibrated at the factory.
It is generally recommended to have all thermometers recalibrated at
least once a year.
For an accurate annual recalibration, contact your nearest Hanna
Customer Service Center.
Hanna Test Plugs provide a quick and easy way to test the accuracy
of the meter by simply connecting these Test Plugs to the probe
connector on the instrument.
If the reading differs by more than ±0.4°C (±0.8°F) from the Test
Plug value, the unit is due for recalibration.
6
Choose the right Test Plug to best suit your needs:
HI 765-18C Calibration key, –18.0°C ±0.4°C
HI 765000C Calibration key, 0.0°C ±0.4°C
HI 765070C Calibration key, +70.0°C ±0.4°C
HI 765-004F Calibration key, –0.4°F ±0.8°F
HI 765032F Calibration key, +32.0°F ±0.8°F
HI 765158F Calibration key,+158.0°F ±0.8°F
BATTERY REPLACEMENT
The instrument is powered by a 9V battery located at the back of the
instrument.
When the battery is rundown, the Battery Error Preventive System
(BEPS) circuitry is activated. BEPS shuts down the LCD automatically
to ensure that no erroneous readings are taken due to a weak
battery. In such cases, the battery needs to be replaced for the correct
functioning of the instrument.
To access the battery, remove the battery
cover by applying pressure in the direction
indicated. Unplug the rundown battery
and replace it with a new one. Re-insert
the battery and replace the cover.
Battery replacement must only take place
in a non-hazardous area using a 9V alkaline battery.
BA TTERY
7
TEMPERATURE PROBES &
ACCESSORIES
Hanna Instruments offers a wide range of probes to meet your needs
to measure the temperature in air, surface, penetration and liquid
applications. These probes use highly sensitive thermistor sensors
which provide greater accuracy, faster response and a temperature
range that is superior to conventional thermistor probes. HI765 series
temperature probes are supplied pre-calibrated from the factory with
±0.4°C accuracy and are ready to use. The probes are easily
connected to your meter with a standard connector. Completely
interchangeable, these probes make it possible for you to switch from
one to another without wasting time and money going through timeconsuming and tedious calibration procedures. They are available in
different handle colors to avoid cross contamination during testing:
HI 765A Air probe, with 1 m (3.3') cable and white handle
HI 765A/10 Air probe, with 10 m (33') cable and white handle
HI 765BL General purpose liquid probe, with 1 m (3.3') cable
and black handle
HI 765BL/10 General purpose liquid probe, with 10 m (33') cable
and black handle
HI 765L General purpose liquid probe, with 1 m (3.3') cable
and white handle
HI 765L/10 General purpose liquid probe, with 10 m (33') cable
and 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
8
HI 765PW/10 Penetration probe with 10 m (33') cable and white
handle
HI 765W Wire probe, without handle (hard-to-reach places)
with 1 m (3.3') cable
HI 765W/10 Wire probe, without handle (hard-to-reach places)
with 10 m (33') cable
HANNA INSTRUMENTS TEMPERATURE PROBES
OTHER ACCESSORIES
HI 710002 Soft carrying case (formerly BORGM)
HI 710009 Blue rubber boot
HI 710010 Orange rubber boot
HI 710031 Hard carrying case (formerly PKGCASE)
HI 721310 9V Battery (10 pcs)
MANTHERR2 Instruction Manual
9
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.
The 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.
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., 584 Park East Drive, Woonsocket, Rhode
Island, 02895 , USA.
Hanna Instruments reserves the right to modify the design,
construction and appearance of its products without advance
notice.
10
CE DECLARATION OF CONFORMITY
DECLARATION OF CONFORMITY
We
Hanna Instruments Srl
V.le delle industrie 12
35010 Ronchi di Villafranca (PD)
ITALY
herewith certify that the thermometers
have been tested and found to be in compliance with the following regulations:
IEC 801-2 Electrostatic Discharge
IEC 801-3 RF Radiated
EN 55022 Radiated, Class B
HI 8751 HI 8752 HI 8753
Date of Issue: 23-11-1995
D.Volpato - Engineering Manager
On behalf of
Hanna Instruments S.r.l.
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 24VAC or 60VDC.
To avoid damages or burns, do not perform any measurement in microwave ovens.
11
HANNA LITERATURE
LAB RECORDING WATER ANALYSIS
ENVIROCARE GENERAL CATALOG
These and many others catalogs, handbooks and leaflets are available from Hanna. To receive your free copy, contact your dealer or the
nearest Hanna Customer Service Center.
http://www.hannainst.com
PRINTED IN PORTUGAL
MANTHERR2
04/97
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