HT HT3302 User manual

Copyright HT ITALIA 2015 Release 1.01 - 15/10/2015
HT3302
Manuale d’uso
User manual
Manual de instrucciones
Bedienungsanleitung
Notice d’utilisation

Indice generale
General index
Ìndice general
Inhalt
Table des matiéres
ITALIANO ......................... IT - 1
ENGLISH .........................EN - 1
ESPAÑOL........................ES - 1
DEUTSCH.......................DE – 1
FRANÇAIS.......................FR - 1

Copyright HT ITALIA 2015 Release EN 1.01 - 15/10/2015
ENGLISH
User manual

HT3302
EN - 1
Table of contents:
1.PRECAUTIONS AND SAFETY MEASURES ...............................................................2
1.1.Preliminary instructions........................................................................................................2
1.2.During use............................................................................................................................3
1.3.After use...............................................................................................................................3
2.GENERAL DESCRIPTION ...........................................................................................4
3.PREPARATION FOR USE ...........................................................................................4
3.1.Initial checks ........................................................................................................................4
3.2.Instrument power supply......................................................................................................4
3.3.Calibration............................................................................................................................4
3.4.Storage.................................................................................................................................4
4.NOMENCLATURE........................................................................................................5
4.1.Instrument description..........................................................................................................5
4.2.Description of the symbols shown on the display ................................................................6
4.3.Description of function keys .................................................................................................6
4.3.1.Trigger key T ............................................................................................................................6
4.3.2.Joystick key J ...........................................................................................................................6
5.OPERATING INSTRUCTIONS.....................................................................................7
5.1.General menu description....................................................................................................7
5.2.Temperature measurement................................................................................................11
6.MAINTENANCE..........................................................................................................14
6.1.General information............................................................................................................14
6.2.Battery replacement...........................................................................................................14
6.3.Cleaning the instrument .....................................................................................................14
6.4.End of life ...........................................................................................................................14
7.TECHNICAL SPECIFICATIONS.................................................................................15
7.1.Reference guidelines .........................................................................................................15
7.2.General characteristics ......................................................................................................15
7.3.Environmental conditions for use.......................................................................................15
7.4.Accessories provided.........................................................................................................15
8.SERVICE....................................................................................................................16
8.1.Warranty conditions ...........................................................................................................16
8.2.Assistance..........................................................................................................................16

HT3302
EN - 2
1. PRECAUTIONS AND SAFETY MEASURES
The instrument has been designed in compliance with the directives relevant to electronic
measuring instruments. For your safety and in order to prevent damaging the instrument,
please carefully follow the procedures described in this manual and read all notes
preceded by the symbol with the utmost attention.
The following symbol is used in this manual:
CAUTION
When this symbol is displayed, the instrument is able to emit a laser pointer.
Always prevent the laser from radiating to your eyes, in order to prevent
any injury. Class 3R laser device according to EN 60825-1.
1.1. PRELIMINARY INSTRUCTIONS
CAUTION
Use the instrument only as specified in this user manual. Improper use may
damage the instrument.
During use and storage, keep the instrument away from direct sunlight or
sources of light, hot surfaces or objects, high temperatures, high humidity
or particularly critical environmental conditions.
After a period of storage in extreme environmental conditions, let the
instrument resume normal operating conditions before using it.
If the thermometer is moved quickly from a cold to a hot environment, some
condensation may appear on the focal lens which catches infrared
radiation. Wait for the condensation to dissipate before taking
measurements.
Do not touch the internal focal lens.
Make sure that the target is larger than the unit's spot size. The smaller the
target, the closer you should be to it. When accuracy is critical, make sure
the target is at least twice as large as the spot size.
Do not carry out measurements under conditions exceeding the limits
specified in § 7.
Make sure that batteries are correctly installed.
Do not carry out any measurement if you notice anomalous conditions such
as breakages, leakages of battery liquid, blind display, etc.
This instrument is not recommended for use in measuring shiny or polished
surfaces (stainless steel, aluminum, etc.).
The instrument cannot measure temperature through transparent surfaces
such as glass. The instrument will measure the surface temperature of the
glass instead.
Steam, dust, smoke, etc. can prevent accurate measurement.

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EN - 3
1.2. DURING USE
Please carefully read the following recommendations and instructions:
CAUTION
Never press the trigger when symbol is displayed and the instrument is
directed towards the eyes. The instrument emits a laser pointer.
If the target has a smooth surface reflecting the laser, prevent the laser from
radiating to the eyes.
Never radiate the laser if flammable gas is present.
If symbol is displayed during use, interrupt testing and replace the
batteries according to the procedure described in § 6.2
Be extremely careful when the laser pointer is turned on.
Do not direct the instrument, especially the laser beam, towards people or
animals.
When using the laser pointer, be careful no to direct the beam onto a
reflective surface which could reflect the beam into the eyes.
Never radiate the laser if flammable gas is present.
1.3. AFTER USE
If the instrument is not to be used for a long time, remove the batteries.

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EN - 4
2. GENERAL DESCRIPTION
HT3302 has the following features:
Infrared temperature measurement up to 500°C
Built-in laser pointer
Laser pointer area for an immediate localization of distance/spot
Automatic reading lock (HOLD)
Auto Power OFF
Distance / Spot ratio D:S = 12:1
Measures in °C/°F
Emissivity adjustable from 0.10 to 1.00
LCD with backlight
White LED built-in illuminators
Blue LED built-in illuminators for UV function
Detection of MAX, MIN, MAX-MIN, AVG values
High and Low alarm threshold setting
Joystick for a quick selection of internal functions
Modern and ergonomic design
3. PREPARATION FOR USE
3.1. INITIAL CHECKS
Before shipping, the instrument has been checked from an electric as well as mechanical
point of view. However, we suggest you to check it rapidly, to detect possible damage
which may have occurred during transport. In case anomalies are found, immediately
contact the Dealer. We also recommend checking that the packaging contains all
components indicated in § 7.4. In case the instrument should be returned, please follow
the instructions given in § 8.1.
3.2. INSTRUMENT POWER SUPPLY
The instrument is supplied with three 1.5V AA LR06 batteries, included in the package.
When batteries are nearly flat, the symbol " " appears on the display. To replace the
batteries, see § 6.2
3.3. CALIBRATION
The instrument has the technical specifications described in this manual. Its performance
is guaranteed for one year starting from the date of purchase.
3.4. STORAGE
In order to guarantee precise measurement, after a long storage time under extreme
environmental conditions, wait for the instrument to come back to normal conditions (see §
7.3).

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EN - 5
4. NOMENCLATURE
4.1. INSTRUMENT DESCRIPTION
CAPTION:
1. Laser pointer
2. IR sensor slot + area laser pointer
3. Protection ring
4. Trigger key T
5. Instrument handle
6. Strap hole
Fig. 1: Description of the instrument's front side
CAPTION:
1. LCD display
2. Joystick key J for internal
navigation
3. Battery Cover
4. Battery cover fastening screw
Fig. 2: Description of the instrument's backside

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CAPTION:
1. 5 white LEDs for external
illuminator
2. 5 blue LEDs for UV function
3. IR sensor slot + area laser pointer
Fig. 3: Detail of the front part of the instrument
4.2. DESCRIPTION OF THE SYMBOLS SHOWN ON THE DISPLAY
CAPTION:
1. Laser pointer activation
2. Data HOLD
3. Battery charge level
4. °C/°F symbol
5. Active UV function
6. Active MAX, MIN, MAX-MIN,
AVG functions
7. MAX, MIN, MAX-MIN, AVG value
display
8. Active HIGH and LOW alarm
thresholds
9. Emissivity value display
10. Emissivity indication
11. Main LCD display
12. Active built-in illuminator
Fig. 4: LCD display description
4.3. DESCRIPTION OF FUNCTION KEYS
4.3.1. Trigger key T
The Trigger key T (see Fig. 1 – part 4) allows the following operations:
Switching on the instrument by shortly pressing
Switching on the instrument and activating measurement by continuously pressing
Automatic switching of the HOLD mode (data fixed on the display) upon release after
measuring
4.3.2. Joystick key J
The Joystick key J(see Fig. 2 – part 2) allows quickly navigating the instrument's internal
menu and confirm selections of measuring parameters (see § 5.1). Pressing the key
allows switching on the instrument.

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EN - 7
5. OPERATING INSTRUCTIONS
5.1. GENERAL MENU DESCRIPTION
1. Switch on the instrument by pressing the Joystick key Jor the Trigger key T.
2. Move the Jkey to “MENU” to enter the general menu. The following screen appears on
the display:
Fig. 5: Activation of the built-in illuminator
3. The symbol “ ” flashes on the display. Move the Jkey to “+” or “-” to enable (ON) or
disable (OFF) the built-in white LED illuminator upon pressing the Tkey.
4. Press the Jkey to confirm selection and go on to next item.
Fig. 6: UV function activation
5. The symbol “UV” flashes on the display. Move the Jkey to “+” or “-” to enable (ON) or
disable (OFF) the UV function with built-in blue LEDs upon pressing the Tkey.
6. Press the Jkey to confirm selection and go on to next item.
Fig. 7: Selection of temperature measuring unit
7. The symbol “°C” flashes on the display. Move the Jkey to “+” or “-” to select
temperature measuring unit “°C” (Celsius) or “°F” (Fahrenheit).
8. Press the Jkey to confirm selection and go on to next item.

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EN - 8
Fig. 8: Setting the emissivity value of the surface
9. The radiating power or emissivity “

” is a value between 0 and 1 which indicates the
capacity of an object to emit energy in the infrared frequency range. This parameter
depends both on the material the object is made of and on the finishing (painting).
Parameter “

” is set by default to 0.95 because approximately 90% of the objects has
such an radiating power. Determining this parameter is critical when polished or
shiny surfaces are involved. To evaluate emissivity under such conditions, cover the
surface to be measured with masking tape or flat black paint, allow time for the area to
reach the same temperature as the material underneath it and measure with emissivity
set to 1.00. Compare the value read with the value measured by a thermometer with K
contact probe in the same spot, then reduce emissivity value until obtaining the same
temperature value on both thermometers. The following Table 1 shows the emissivity
value of some common materials
Material Material 
Water 0.96 Bricks 0.75
Stainless steel 0.14 Tape 0.96
Aluminium foil 0.09 Brass foil 0.06
Asphalt 0.95 Human skin 0.98
Mat black paper 0.86 PVC plastic 0.93
Cement 0.97 Polycarbonate 0.80
Cast iron 0.81 Oxydized Copper 0.78
Chalk 0.75 Rust 0.80
Rubber 0.95 Paint 0.90
Wood 0.85 Earth 0.93
Table 1: Emissivity values of common materials
10.The symbol “EMS” flashes on the display. Move the Jkey to “+” or “-” to set the desired
emissivity value between 0.01 and 1.00 (default EMS value = 0.95). Keep the Jkey
pressed in position “+” or “-” to quickly scroll through the values.
11.Press the Jkey to confirm selection and go on to next item.

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EN - 9
Fig. 9: Laser pointer activation
12.The symbol “ ” flashes on the display. Move the Jkey to “+” or “-” to enable (ON) or
disable (OFF) the laser pointer upon pressing the Tkey.
13.Press the Jkey to confirm selection and go on to next item.
Fig. 10: MAX, MIN, MAX-MIN, AVG function activation
14.The symbol “MAX-MIN AVG” flashes on the display. Move the Jkey to “+” or “-” to
enable (ON) or disable (OFF) the reading function of MAX, MIN, AVG and MAX-MIN
value on the display during and at the end of measurement (see § 5.2).
15.Press the Jkey to confirm selection and go on to next item.
Fig. 11: HIGH and LOW alarm function activation
16.The symbol “Alarm HI” flashes on the display. Move the Jkey to “+” or “-” to set the
value of the maximum alarm threshold on temperature measurement between values -
30°C and 650°C or “OFF” (disabled). Keep the Jkey pressed in position “+” or “-” to
quickly scroll through the values. The buzzer will sound continuously if the measured
temperature value is higher than the HIGH threshold.
17.Press the Jkey to confirm the HIGH threshold setting and go on to the LOW threshold
(see Fig. 11 – right side).
18.The symbol “Alarm LO” flashes on the display. Move the Jkey to “+” or “-” to set the
value of the minimum alarm threshold on temperature measurement between values -
30°C and 650°C or “OFF” (disabled). Keep the Jkey pressed in position “+” or “-” to
quickly scroll through the values. The buzzer will sound continuously if the measured
temperature value is lower than the LOW threshold.
19.Press the Jkey to confirm selection and go on to next item.

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EN - 10
Fig. 12: Activation of backlight function on measurement
20.The symbol “Lite” flashes on the display. Move the Jkey to “+” or “-” to enable (ON) or
disable (OFF) the backlight function of the display upon pressing the T key (backlight
will deactivate automatically 5 seconds after measurement is finished).
21.Press the Jkey to confirm selection and go on to next item.
Fig. 13: Activation of Auto Power OFF (APO) function on measurement
22.The symbol “APO” flashes on the display. Move the Jkey to “+” or “-” to enable of
disable (OFF) the Auto Power OFF function of the instrument. In case of activation, it is
possible to set the value between 1s and 60s (the instrument switches off automatically
anyway after 5 minutes' idling).
23.Press the Jkey to confirm selection and move the key to “MENU” to go back to
measuring mode.

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5.2. TEMPERATURE MEASUREMENT
1. Switch on the instrument by pressing the Trigger key Tor the Joystick key J.
2. Set the instrument as desired from the general menu (see § 5.1) paying special
attention to the emissivity value of the material of the object to be measured and to the
activation of the laser pointer.
3. Turn the protection ring (see Fig. 1 – part 3) and open the central hole (see Fig. 14).
Fig. 14: Opening the protection ring
4. Press and hold keep the Trigger key Tto activate the instrument and direct it towards
the surface of the object whose temperature must be measured. The laser pointer on
the upper part o the instrument (see Fig. 1 – part 1) and the area laser beam are
directed towards the target (see Fig. 15).
Fig. 15: Laser pointer activation
CAUTION
The area laser beam allows for an immediate evaluation of the maximum
dimension of the measuring spot with regard to the distance from the target in
order to obtain a correct temperature measurement.

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EN - 12
5. Bring the instrument further or closer to the target, paying attention to the progressive
increase or decrease of the which can be detected according to the reference
numerical values indicated on the side of the instrument (see Fig. 16).
Fig. 16: Definition of Distance / Spot ration
6. Make sure that the target whose temperature is to be measured is at least as large as
the unit’s spot (see Fig. 17). The smaller the object is, the closer you should be to it.
When accuracy is critical, make sure the object is at least twice as large as the
spot size. To find a “Hot Spot”, aim the thermometer at the measured object, then
move the instrument across the object until a hot spot is located.
Fig. 17: Correct measuring conditions
7. Release the Trigger key T to stop measuring and freeze the last read value. The
symbol “ ” disappears and the message “HOLD” is shown on the display (see Fig.
18).
Fig. 18: Display of measured values
8. With active options MAX, MIN, MAX-MIN, AVG (see § 5.1), move the Jkey to position
“+” or “-“. MIN (Minimum), AVG (Average between Max and Min values) and MAX-MIN
(difference between Max and Min values) values are shown on the secondary display.
9. The instrument will automatically switch off after 5 minutes' idling or after the time set in
“APO” function has elapsed (see § 5.1).

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Temperature measurement of forced ventilation systems (HVAC)
1. Activate the white LED external illuminator function (see § 5.1).
2. Press the Tkey to activate measurement. The laser pointer and the symbol “ ”
appear on the display.
3. Direct the white light beam (see Fig. 3 – part 1) out of the ventilation system (see Fig.
19) and carry out measurement as described above.
Fig. 19: Measuring output temperature of HVAC systems
Detection of dispersion of refrigerating agent in car engines and HVAC systems
1. Activate the “UV” (Ultraviolet) function with blue LEDs (see § 5.1).
2. Press the Tkey to activate measurement. The laser pointer and the symbol “UV”
appear on the display.
3. Direct the blue light beam (see Fig. 3 – part 2) onto the engine unit (see Fig. 20). The
light will reveal the presence of dispersion of refrigerating agent. Carry out
measurement as described above.
Fig. 20: Measuring dispersion temperature of refrigerating agent

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EN - 14
6. MAINTENANCE
6.1. GENERAL INFORMATION
1. The instrument you purchased is a precision instrument. While using and storing the
instrument, carefully observe the recommendations listed in this manual in order to
prevent possible damage or danger during use.
2. Do not use the instrument in environments with high humidity levels or high
temperatures. Do not expose to direct sunlight.
3. Always switch off the instrument after use. In case the instrument is not to be used for
a long time, remove the battery to avoid liquid leaks that could damage the instrument’s
internal circuits.
6.2. BATTERY REPLACEMENT
When the display shows the symbol “ ” and the message “Low”, replace the batteries.
CAUTION
Only expert and trained technicians should perform this operation. Before
removing batteries, disconnect all cables from input terminals.
1. Loosen the screw fastening the battery cover (see Fig. 2 – part 4) and open the
compartment.
2. Remove the flat batteries, insert new batteries of the same type (see §) and close the
cover of the battery compartment.
3. Do not scatter old batteries into the environment. Use the relevant containers for
disposal.
6.3. CLEANING THE INSTRUMENT
Use a soft and dry cloth to clean the instrument. Never use wet cloths, solvents, water, etc.
6.4. END OF LIFE
CAUTION: the symbol indicates that the appliance, the battery and its
accessories must be collected separately and correctly disposed of.

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7. TECHNICAL SPECIFICATIONS
Accuracy indicated as [±(%reading) or ±degrees] referred to a temperature of 23°C±2°C
TEMPERATURE MEASUREMENT (Autorange)
Function Range Resolution Accuracy Response time
°C -30°C 500°C 0.1°C
±3.0°C (-30°C -10°C)
±2.0°C (-10°C 0°C)
±1.5°C or ±1.5%reading
(higher value) (>0°C) <500ms
(95% reading)
°F -22°F 932°F 0.2°F
±6.0°F (-22°F 14°F)
±4.0°F (14°F 32°F)
±3°F or ±1.5%reading
(higher value) (>32°F)
Spectrum response: 8 14m
D/S ratio: 12:1 (calculated at 95% battery level)
Emissivity field: 0.10 1.00
Temperature coefficient: ±0.1°C/°C or ±0.1%reading (higher value)
Reading repeatability: ±8%reading or ±1.0°C(2°F) (higher value)
Laser pointer: Output <5mW, λ= 650nm, device Class 3R, EN60825-1:2014
UV pointer: λ= 460nm (in compliance with IEC62471) (low risk Group 1)
7.1. REFERENCE GUIDELINES
Safety: IEC/EN61010-1:2001
EMC: IEC/EN61326-1:2006, IEC/EN61326-2:2006
Laser source: IEC/EN60825-1 :2007, Class 3R
UV source: IEC62471 (Group 1)
Max operating altitude: 2000m (6592ft)
Vibrations: 2.5g compliance with IEC60068-2-6, 10200Hz
Shock: 50g compliance with IEC60068-2-27, 11ms
Fall test: 1.2m (4ft)
7.2. GENERAL CHARACTERISTICS
Mechanical specifications
Size (L x W x H): 185 × 104 × 54mm (7 x 4 x 2in)
Weight (batteries included): 380g (13ounces)
Power supply
Battery type: 3x1.5V alkaline batteries type AA LR06
Low battery indication: symbol " " appears on the display
Battery duration: approx 20 hours (with active laser and backlight)
Auto Power OFF: after 5 minutes' idling
Display
Characteristics: 5 LCD, Custom, backlit
7.3. ENVIRONMENTAL CONDITIONS FOR USE
Operating temperature: -10°C 50°C (14°F 122°F)
Operating humidity: 10 90%RH
Storage temperature: -20°C 60°C (-4°F 140°F)
Storage humidity: < 70%RH
This instrument complies with Directive EMC 2004/108/EC
This instrument complies with European Directive 2011/65/EU (RoHS) and 2012/19/EU (WEEE)
7.4. ACCESSORIES PROVIDED
Soft transport bag
Batteries
User manual

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EN - 16
8. SERVICE
8.1. WARRANTY CONDITIONS
This instrument is warranted against any material or manufacturing defect, in compliance
with the general sales conditions. During the warranty period, defective parts may be
replaced. However, the manufacturer reserves the right to repair or replace the product.
Should the instrument be returned to the After-sales Service or to a Dealer, transport will
be at the Customer's charge. However, shipment will be agreed in advance.
Only use original packaging for shipment; any damage due to the use of non-original
packaging material will be charged to the Customer.
The manufacturer declines any responsibility for injury to people or damage to property.
The warranty shall not apply in the following cases:
Repairs that may become necessary as a consequence of an incorrect use of the
instrument or due to its use together with non-compatible appliances.
Repairs that may become necessary as a consequence of improper packaging.
Repairs which may become necessary as a consequence of interventions performed
by unauthorized personnel.
Modifications to the instrument performed without the manufacturer's explicit
authorization.
Use not provided for in the instrument's specifications or in the instruction manual.
The content of this manual cannot be reproduced in any form without the manufacturer's
authorization.
Our products are patented and our trademarks are registered. The manufacturer
reserves the right to make changes in the specifications and prices if this is due to
improvements in technology.
8.2. ASSISTANCE
If the instrument does not operate properly, before contacting the After-sales Service,
please check the conditions of the battery and replace it, if necessary. Should the
instrument still operate improperly, check that the product is operated according to the
instructions given in this manual. Should the instrument be returned to the After-sales
Service or to a Dealer, transport will be at the Customer's charge. However, shipment will
be agreed in advance. A report will always be enclosed to a shipment, stating the
reasons for the product's return. Only use original packaging for shipment; any damage
due to the use of non-original packaging material will be charged to the Customer.

Via della Boaria 40
48018 – Faenza (RA) – Italy
Tel: [phone] (4 linee r.a.)
Fax: +39 – 0546 – 621144
Email: [email protected]
http://www.ht-instruments.com