HT Italia HT3305 User manual

Copyright HT ITALIA 2018 Release EN 1.00 - 21/03/2018
ENGLISH
User manual

HT3305
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.Storage.................................................................................................................................4
4.NOMENCLATURE........................................................................................................5
4.1.Instrument description..........................................................................................................5
4.2.Description of the displayed symbols...................................................................................5
4.3.Description of function keys.................................................................................................6
4.3.1.Trigger key T ............................................................................................................................6
4.3.2./key.................................................................................................................................6
4.3.3./ key.................................................................................................................................6
4.3.4.MODE key ................................................................................................................................6
5.OPERATING INSTRUCTIONS.....................................................................................7
5.1.IR temperature measurement..............................................................................................7
5.2.K-type temperature measurement .......................................................................................8
6.MAINTENANCE............................................................................................................9
6.1.General information..............................................................................................................9
6.2.Battery replacement.............................................................................................................9
6.3.Cleaning the instrument.......................................................................................................9
6.4.End of life.............................................................................................................................9
7.TECHNICAL SPECIFICATIONS.................................................................................10
7.1.Reference guidelines .........................................................................................................10
7.2.General characteristics ......................................................................................................10
7.3.Environmental conditions for use.......................................................................................11
7.4.Accessories provided.........................................................................................................11
8.SERVICE....................................................................................................................12
8.1.Warranty conditions ...........................................................................................................12
8.2.Assistance..........................................................................................................................12

HT3305
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 your eyes, in order to avoid any
injury. Class 2 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 under extreme environmental conditions, let the
instrument resume normal operating conditions before using it.
Moving the thermometer quickly from a cold to a warm place it may
condense on the focal lens from which infrared radiation is captured. Wait
until condensation is absorbed 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 battery is 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 IR 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 IR measurements.

HT3305
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1.2. DURING USE
Please carefully read the following recommendations and instructions:
CAUTION
Never press the trigger Twhen 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
beaming your eyes.
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 your 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

HT3305
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2. GENERAL DESCRIPTION
The instrument has the following features:
Infrared temperature measurement up to 1000°C (1832°F)
Temperature measurement with type-K probe
Laser pointer area for an immediate localization of distance/spot
Automatic reading lock (HOLD)
Auto Power OFF
Distance / Spot ratio D:S = 20:1
Measures in °C/°F
LCD with backlight
Detection of MAX, MIN, AVG and DIF values
High and Low alarm threshold setting
IP54 mechanical protection
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 you find out anomalies, 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 2x1.5V alkaline batteries type AAA LR03, included in the
package. When batteries are nearly flat, the symbol " " is displayed. To replace the
batteries, see § 6.2
3.3. STORAGE
In order to guarantee precise measurements, after a long storage time under extreme
environmental conditions, wait until the instrument comes back to normal conditions (see §
7.3).

HT3305
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4. NOMENCLATURE
4.1. INSTRUMENT DESCRIPTION
CAPTION:
1. IR sensor and laser
pointer
2. LCD display
3. /key
4. / key
5. MODE key
6. Trigger key T
7. Battery cover
8. Input for type K probe
9. Battery cover cap
10.Battery pack
Fig. 1: Description of the instrument’s parts
4.2. DESCRIPTION OF THE DISPLAYED SYMBOLS
CAPTION:
1. Data HOLD
2. Laser pointer activation
3. Alarms activation
4. °C/°F symbol
5. Battery charge level
6. Emissivity value display
7. Secondary display
8. MAX,MIN,AVG,DIF and K-
TYPE indications
9. Main LCD display
10. Measurement activation
Fig. 2: LCD display description

HT3305
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4.3. DESCRIPTION OF FUNCTION KEYS
4.3.1. Trigger key T
The Trigger key T (see Fig. 1 – part 6) allows the following operations:
Switching on the instrument and activating measurement by continuously pressing
(“SCAN” symbol on display)
Automatic switching of the HOLD mode (data fixed on display) when releasing after
measurement
4.3.2. /key
The /key allows the activation/deactivation of the double laser pointer by pressing
trigger key T. The “ ” symbol (see Fig. 2 – part 2) is displayed. The same key allows to
performs the selection of parameters inside setup section (see § 4.3.4)
4.3.3. / key
The / key allows the activation/deactivation of the display backlight. The same key
allows to performs the selection of parameters inside setup section (see § 4.3.4)
4.3.4. MODE key
Press the MODE key to select the Maximum ("MAX" symbol), Minimum ("MIN" symbol),
Average ("AVG" symbol) and Difference between Max and Min ("DIF" symbol) values in
the secondary display (see Fig. 2 - part 7) in the IR temperature measurement by pressing
trigger T key.
The long press (> 2s) of the MODE key allows to enter in the setup section of the
instrument. The cyclic pressure of the MODE key allows to pass passage from one
parameter to another as shown in the following Fig. 3. Use the arrow keys or to set
the value with parameter flashing at display
Fig. 3: Setup parameters description
The followed parameters are set:
EMS Setting emissivity value of the material in the range: 0.01 ÷1.00
°C/°F Setting unit of temperature between the options: “°C” (Celsius) or “°F”
(Fahrenheit)
HAL (On/Off) Activation/deactivation “High” alarm in the IR temperature
measurement. The “ H” symbol is flashing at display
HAL (Set value) Setting “High” alarm threshold in the range: -50° ÷ 1000°C (-58°F ÷
1832°F). For values > HAL threshold the instrument emits a continue sound
LAL (On/Off) Activation/deactivation “Low” alarm in the IR temperature
measurement. The “L ” symbol is flashing at display
LAL (Set value) Setting “Low” alarm threshold in the range: -50° ÷ 1000°C (-58°F ÷
1832°F). For values < LAL threshold the instrument emits a continue sound
Press MENU key to save and back to the measurement screen

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5. OPERATING INSTRUCTIONS
5.1. IR TEMPERATURE MEASUREMENT
1. Switch on the instrument by pressing trigger key T
2. Press /key to activate/deactivate the double laser pointer (see § 4.3.2)
3. Press MODE key to set the unit, activate/deactivate the alarm thresholds and the
correct Emissivity value depending on the material (see § 4.3.4)
4. Press and hold Trigger key Tto activate the test and point the instrument in the
direction of the target ‘s surface
CAUTION
The area laser beam allows an immediate evaluation of the maximum size of
the measuring spot with regard to the distance from the target in order to get a
correct temperature measurement.
5. Make sure that the target, whose temperature is to be measured, is at least as large as
the unit’s spot (see Fig. 4). The smaller the object is, the closer you should be to it
(Example: if the distance from the object is 240mm – 9.4inch, the section of the object
should be at least of 12mm – 0.5inch for a correct temperature measurement). When
accuracy is critical, make sure the object is at least twice as large as the spot
size
Fig. 4: Distance / Spot ratio of the instrument
6. Release Trigger key T to stop measuring and freeze the last read value on the main
display. The message “HOLD” is shown. The MAX, MIN, AVG or DIF values is also
shown on the secondary display by pressing MODE key
7. The instrument will automatically switch off after 10 seconds of idleness.

HT3305
EN - 8
5.2. K-TYPE TEMPERATURE MEASUREMENT
CAUTION
Do not compare the infrared temperature measurement with the
measurements made with K-type probe, since (because of the totally
different nature of the two methods) the obtained values may differ
remarkably
Measurement with the K-type probe can be used in situations where IR
measurement cannot be used (e.g.: measurement of shiny/bright surfaces
such as glass and plexiglas)
1. Open the protection cap of K-type input terminal (see Fig. 1 – part 8) and connect the
K-type probe respecting the indicated polarities (see Fig. 5)
Fig. 5: Connection of K-type probe in the instrument
2. Switch on the instrument by pressing trigger key Tand verify the “K-TYPE” message in
the top part of the secondary display
3. Connect the probe to the device under test
4. Press and hold Trigger key Tto activate the test
5. Release Trigger key T to stop measuring and freeze the last read value on the
secondary display. The message “HOLD” is shown
6. The instrument will automatically switch off after 10 seconds of idleness

HT3305
EN - 9
6. MAINTENANCE
6.1. GENERAL INFORMATION
1. 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 “ ” replace the battery.
CAUTION
Only expert and trained technicians should perform this operation. Before
removing batteries, disconnect all cables from input terminals.
1. Unscrew the battery cover cap (see Fig. 1 – part 9) and extract the battery pack (see
Fig. 1 – part 10)
2. Remove the flat batteries, insert new battery of the same type (see § 7.2) by respecting
the indicated polarities (see Fig. 6), restore the battery pack and screw the battery
cover cap
Fig. 6: Replace internal batteries
3. Do not scatter old battery 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.