Instruction manual [PDF] (6 pages)
- Updated: 18.04.2026
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Instruction Manual
HI 8757 - HI 8758
Portable
Microprocessor
K-Type Thermocouple
Thermometers
h t t p : / / w w w . h a n n a i n s t . c o m
These Instruments are in
Compliance with the CE Directives
ins
e
rum ns
°C
RANGE
0.1 °C : -50.0 to 150.0 °C
1 °C : -50 to 900 °C
HI 8757
Microprocessor Thermometer
OFF
1°C
0.1°C
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Dear Customer,
Thank you for choosing a Hanna Product. It is recommended that you
read this instruction manual carefully before using the instrument.
This 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. If you need more technical information, do not hesitate to
e-mail us at [email protected].
These instruments are in compliance with the
directives EN 50081-1
and EN 50082-1.
PRELIMINARY EXAMINATION ...................................................... 2
FUNCTIONAL DESCRIPTION AND SPECIFICATIONS OF HI 8757.... 3
FUNCTIONAL DESCRIPTION AND SPECIFICATIONS OF HI 8758.... 4
CALIBRATION............................................................................. 5
OPERATIONAL GUIDE ................................................................. 5
DISPLAY CODE GUIDE ................................................................ 5
ACCESSORIES............................................................................. 6
BATTERY REPLACEMENT .............................................................. 6
WARRANTY .............................................................................. 10
CE DECLARATION OF CONFORMITY............................................ 11
TABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTS
ISO 9000 Certified
Company since 1992
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and exam-
ine it carefully to make sure that no damage has occurred
during shipping. If there is any noticeable damage, notify your
Dealer or the nearest Hanna Office.
Note: Save all packing materials until you are sure that the
instrument functions correctly. Any defective item must
be returned in the original packaging together with the
supplied accessories.
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SPECIFICATIONS
HI8757
Range
-50.0 to 900°C
Resolution
0.1°C (-50.0 to 150.0°C)
1°C (-50 to 900°C)
Accuracy
±0.5% F.S. for one year, excluding probe error
EMC Typical
±0.5ºC
Deviation
with HI 766 K-thermocouple probe
Display
3½ digit LCD
Battery Type
9V battery
Life
approximately 200 hours of continuous use
Probe
K-type thermocouple (optional see pages 6-10)
Environment
0 to 50ºC (32 to 122ºF);
max. 95% RH non-condensing
Dimensions
180 x 83 x 40 mm (7.1x3.3x1.6")
Weight
350 g (12.4 oz.) with probe
FUNCTIONAL DESCRIPTION AND
FUNCTIONAL DESCRIPTION AND
FUNCTIONAL DESCRIPTION AND
FUNCTIONAL DESCRIPTION AND
FUNCTIONAL DESCRIPTION AND
SPECIFICATIONS OF HI 8757
SPECIFICATIONS OF HI 8757
SPECIFICATIONS OF HI 8757
SPECIFICATIONS OF HI 8757
SPECIFICATIONS OF HI 8757
ins
e
rum ns
°C
RANGE
0.1 °C : -50.0 to 150.0 °C
1 °C : -50 to 900 °C
HI 8757
Microprocessor Thermometer
OFF
1°C
0.1°C
1
2
5
3
4
1) LCD display
2) Rotary switch
3) OFF mode
4) 1ºC resolution
5) 0.1ºC resolution
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FUNCTIONAL DESCRIPTION AND
FUNCTIONAL DESCRIPTION AND
FUNCTIONAL DESCRIPTION AND
FUNCTIONAL DESCRIPTION AND
FUNCTIONAL DESCRIPTION AND
SPECIFICATIONS OF HI 8758
SPECIFICATIONS OF HI 8758
SPECIFICATIONS OF HI 8758
SPECIFICATIONS OF HI 8758
SPECIFICATIONS OF HI 8758
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°F
RANGE
0.2 °F : -58.0 to 199.9 °F
200 to 302 °F
1 °F : -58 to 1650 °F
HI 8758
Microprocessor Thermometer
OFF
1°F
0.2°F
5
3
4
1
2
1) LCD display
2) Rotary switch
3) OFF mode
4) 1ºF resolution
5) 0.2ºF resolution
SPECIFICATIONS
HI 8758
Range
-58.0 to 1650°F
Resolution
0.2°F (-58.0 to 199.8°F)
1°F (-58 to 1650°F)
Accuracy
±0.5% F.S. for one year, excluding probe error
EMC Typical
±1ºF
Deviation
with HI 766 K-thermocouple probe
Display
3½ digit LCD
Battery Type
9V battery
Life
approximately 200 hours of continuous use
Probe
K-type thermocouple (optional see pages 6-10)
Environment
0 to 50ºC (32 to 122ºF);
max 95% RH non-condensing
Dimensions
180 x 83 x 40 mm (7.1x3.3x1.6")
Weight
350 g (12.4 oz.) with probe
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OPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDE
INITIAL PREPARATION
Remove the battery cover on the rear of your thermometer. Unwrap
the battery. Insert and connect it to the clip and replace the cover.
Connect the temperature probe to the probe socket on the top of the
meter.
To switch on, turn the rotary dial to the desired
resolution in ºC or ºF (depending on the model).
If a temperature probe is plugged in, the unit
will display the temperature.
With the rotary knob turned to the deci-
mal-point resolution (0.1ºC or 0.2ºF), "Er"
is displayed if the temperature reading falls
out of the instrument range (see Specifica-
tions on page 3-4). Turn the rotary knob
to the 1ºC or 1ºF position.
If "Er" is still displayed, check the probe cable
and connector.
To switch your thermometer off, turn the rotary
knob to OFF.
OFF
1°C
0.1°C
OFF
1°C
0.1°C
CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
All Hanna 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 your dealer or the
nearest Hanna Service Center.
Display
Description
Er
Temperature out of range
Eb
Low battery voltage
All segments
Initial input is out of range,
light up for more
or no probe is connected
than 3 seconds
to the instrument
DISPLAY CODE GUIDE
DISPLAY CODE GUIDE
DISPLAY CODE GUIDE
DISPLAY CODE GUIDE
DISPLAY CODE GUIDE
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BATTERY REPLACEMENT
BATTERY REPLACEMENT
BATTERY REPLACEMENT
BATTERY REPLACEMENT
BATTERY REPLACEMENT
The meter stops to operate when the low battery
signal is detected. The user is warned by the code
"Eb" on the display.
The instrument is powered by a 9 V battery lo-
cated at the rear of the instrument.
Battery replacement must only take place in a
non-hazardous area using a 9V alkaline battery.
To access the battery, remove the cover by ap-
plying pressure in the direction indicated. Unplug
the rundown battery and replace it with a new
one.
BATTERY
ACCESSORIES
ACCESSORIES
ACCESSORIES
ACCESSORIES
ACCESSORIES
K-TYPE THERMOCOUPLE PROBES
with detachable handle & mini-connector
(to be used in conjunction with the HI 766HD probe handle):::::
HI 766PA Roller surface probe, max 320°C/600°F
HI 766PB Surface probe, max 650°C/1200°F
100mm
4"
280mm
7.8"
280mm
11"
200mm
7.9"
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