Dew Point; Battery Replacement; Troubleshooting - TFA 31.1141 Instrucciones De Uso

TFA_No. 31.1141_Anleitung
MOLD DETECTOR
Infrared Thermometer with dew point

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 ceil-
ings in whichever spot that is cooler than 13.2 °C, and that this may later lead
to patches of mould or damp.
6. Getting started
• Open the battery compartment. The battery compartment is located inside of
the handle. Flip the battery compartment cover down.
• Connect the battery 9 V, polarity as indicated.
• Insert the battery into the battery compartment. Please pay attention to the
connection wires.
• Close the battery compartment again. The cover is properly inserted in the
housing, as soon as a click is heard.
• The device is ready for use.
7. Measuring procedure
• Press the red measuring button on the handle to activate the device. A click is
heard.
• You can activate/deactivate the backlight and the laser by pressing the
laser/backlight button. With each press of the button the status changes as
follows:
• Laser on/backlight off
• Laser on/backlight on
• Laser off/backlight on
• Laser off/backlight off
• appears on the display when the laser is activated.
• The measuring surface is in the middle between the two laser points.
• The surface temperature of the measuring surface is displayed in the lower
part of the display.
• The measured value of the thermo-hygro sensor is displayed in the upper part
of the display.
• Each press on the MODE button in normal mode will change the display
between:
• Ambient humidity (%RH)
• Dew point temperature (DP)
• Ambient temperature (AT)
• The LED lights (green/yellow/red) indicate the dew point status:
• Green light: no mould hazard
• Yellow light: Increased danger of mold, an intermittent alarm will sound
• Red light: Imminent danger of mold, a continuous alarm will sound
• There is a bar graph display located on the right side of the display. The more
bars are displayed, the higher the risk of mold.
• Press the °C/°F button, to change between °C (default) or °F as temperature
unit.
• Press the red measuring button on the handle to deactivate the device.
• When the instrument is not used, it will automatically switch off after 15 minutes.
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MOLD DETECTOR
Infrared Thermometer with dew point
8. Distance, Spot Size, and Field of View
• As the distance (D) from the object increases, the spot size (S) of the area
measured by the device becomes larger at a ratio D:S = 12:1 (e.g. 120 cm dis-
tance = 10 cm spot size). To get the most accurate temperature reading, aim
at the target as near as possible.
• Should the distance be too great, there is a risk the temperature outside the
aimed target has also been taken. The double laser helps to aim the measur-
ing spot exactly.
Please take note of the following:
• Not suitable for measuring shiny or polished metal surfaces (stainless steel,
aluminium, etc.).
• The device cannot measure through transparent surfaces such as glass or
plastic. It will measure the surface temperature of the glass instead.
9. Care and maintenance
• The sensor is the most delicate part of the infrared thermometer. Please pro-
tect the sensor part from dirt.
• Clean the device with a soft damp cloth. Do not use solvents or scouring
agents.
• Remove the battery if you do not use the device for a long period of time.

9.1 Battery replacement

• Change the battery when the empty battery symbol appears on the display.
• Make sure the unit is powered off before changing the battery.

10. Troubleshooting

Problem Solution
➜ Switch on the device - press the measuring
No display
button
➜ Ensure that the battery polarity is correct
➜ Change the battery
If your device fails to work despite these measures, contact the retailer where
you purchased the product.
11. Waste disposal
This product has been manufactured using high-grade materials and components
which can be recycled and reused.
Never dispose of empty batteries and rechargeable batteries with
ordinary household waste.
As a consumer, you are required by law to take them to your retail
store or to an appropriate collection site depending on national or
local regulations in order to protect the environment.
The symbols for the contained heavy metals are:
Cd = cadmium, Hg = mercury, Pb = lead
This product is labelled in accordance with the EU Waste Electrical
and Electronic Equipment Directive (WEEE).
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