Dew Point - TFA 31.1141 Bedienungsanleitung

TFA_No. 31.1141_Anl_02_23
MOLD DETECTOR
Infrared Thermometer with dew point
Thank you for choosing this instrument from TFA.
1. Before you use this product
• Please make sure you read the instruction manual carefully.
• Following and respecting the instructions in your manual will prevent damage to your
instrument and loss of your statutory rights arising from defects due to incorrect use.
• We shall not be liable for any damage occurring as a result of non-following of these
instructions. Likewise, we take no responsibility for any incorrect readings or for any
consequences resulting from them.
• Please pay particular attention to the safety notices!
• Please keep this instruction manual safe for future reference.
2. Range of application and all the benefits of your new instrument at a glance
• Imminent risk of mold can be located at a glance.
• Contact-free measuring of surface temperature (of walls, floors, ceilings)
• Measuring of the ambient temperature and relative humidity
• Calculation of the dew point (further cooling of air leads to condensation)
• Visual indication of the dew point status with LED indicator lights (green/yellow/red)
• Bar graph shows risk of mould
• Double laser sighting shows the exact spot size area
• Backlight
3. Delivery contents
• Infrared thermometer
• Storage bag
4. For your safety
• This product is exclusively intended for the range of application described above. It
should only be used as described within these instructions.
• Unauthorized repairs, alterations or changes to the product are prohibited and might
result in dangerous laser radiation.
• The product is not suitable for taking body temperature.
Caution!
Risk of injury!
• The product is equipped with a class 2 laser. If the sign on the device is not written in the
language of your country, please affix the sign below onto the device.
ATTENTION! CLASS 2 LASER
Never look directly into the laser beam.
Do not direct the laser beam into the eyes of a person or animal.
It may cause permanent eye damage.
Wavelength: 630 - 670 nm | Output: <1mW | EN 60825-1:2015-07
• Do not point the laser beam at mirrors or other reflective surfaces. The uncontrolled
reflected beam may strike people or animals
• Do not aim too close at hot or hazardous targets.
• Keep this device and the battery out of reach of children.
• Small parts can be swallowed by children (under three years old).
• Batteries contain harmful acids and may be hazardous if swallowed. If a battery is swal-
lowed, this can lead to serious internal burns and death within two hours. If you suspect
a battery could have been swallowed or otherwise caught in the body, seek medical help
immediately.
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19.02.2023 15:31 Uhr Seite 6
• 9V block battery
• Instruction manual
MOLD DETECTOR
Infrared Thermometer with dew point
• Batteries must not be thrown into a fire, short-circuited, taken apart or recharged. Risk
of explosion!
• Low batteries should be changed as soon as possible to prevent damage caused by leak-
ing.
• Avoid contact with skin, eyes and mucous membranes when handling leaking batteries.
In case of contact, immediately rinse the affected areas with water and consult a doctor.
Important information on product safety!
• Do not expose the device to extreme temperatures, vibrations or shocks.
• Protect the device from high or abrupt temperature changes.
• Do not leave the device near objects of high temperature.
• Do not immerse the device in water. Water can penetrate and cause malfunction. Protect
it from moisture.
• Check the housing before using the device. Do not use the device if it seems to be dam-
aged. Check for cracks or missing plastic parts.
• Steam, dust, smoke, etc. can obstruct the unit optics and prevent accurate measurement.
5. Elements and buttons
A. Display
A 1: Laser symbol A 2: Thermo-hygro sensor display
A 3: Surface temperature A 4: Bar graph
A 5: Emissivity
B. Housing
B 1: Infrared lens B 2: Laser
B 3: LED indicator lights B 4: Thermo-hygro sensor
B 5: Battery compartment
C. Buttons
C 1: Laser/backlight button C 2: MODE button
C 3: C/°F button C 4: Measuring button
5. Measuring procedure
• Every object releases infrared energy. The optical detector senses the infrared energy,
converts this information into a digital reading and the surface temperature is displayed.
• The device also displays the ambient temperature and humidity, from which the dew
point is calculated.
• The closer the value of the surface temperature is to the dew point temperature value, the
higher the risk of mould formation on the measured surface.

5.1 Dew point

• When air is cooled down continuously at a constant absolute humidity, then the relative
humidity will steadily increase up to a maximum of 100%. If the air is cooled further,
then the excess water vapour is extracted from it in the form of water droplets. This is
the dew point temperature.
• If the measuring unit indicates an air temperature of 20 °C and a relative humidity of
65%, then the dew-point temperature will be 13.2 °C. This means that the air in a room
will condense and form water droplets on walls and ceilings in whichever spot that is
cooler than 13.2 °C, and that this may later lead to patches of mould or damp.
(% RH humidity, DP dewpoint,
AT temperature)
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