Bosch GIS 1000 C Professional Original Instructions Manual page 31

Troubleshooting – Causes and Corrective Measures
Error
Measuring tool cannot be switched on.
Function indicator t for contact tempera-
ture measurement does not appear on the
display.
Measuring tool cannot be connected to a
computer.
Definitions
Infrared heat radiation
Infrared heat radiation is electromagnetic radiation emitted
by every body. The amount of radiation depends on the tem-
perature and the emissivity degree of the body.
Emissivity Degree
The emissivity degree of an object depends on the material
and the structure of its surface. It states how much infrared
heat radiation the object emits compared to an ideal heat
emitter (black body, emissivity degree  = 1).
Thermal Bridge
A thermal bridge is an object that undesirably transmits heat
outwards or inwards, therefore differing significantly from the
temperature of the rest of a wall or from the desired tempera-
ture of a wall.
As the surface temperature at thermal bridges is lower than in
the rest of the room, the risk of mould increases significantly
at these locations.
Bosch Power Tools
Cause
Battery pack or batteries
empty
Battery too warm or too cold Allow the battery to reach the correct temperature or
Measuring tool too warm or
too cold
Image memory defective
Image memory full
Measuring tool is defective Send the measuring tool to an authorised Bosch
Connection 25 for thermo-
couple defective
Measuring tool not recog-
nised by computer.
Micro USB connection or
micro USB cable defective
Humidity and ambient tem-
perature sensor 5 defective
Relative Humidity
The relative humidity provides information on how intensive
the air is saturated with water vapour. It is stated as a percent-
age of the maximum amount of water vapour that the air can
absorb. The maximum amount of water vapour depends on
the temperature: The higher the temperature, the more
amount of water vapour the air can absorb.
When the relative humidity is too high, the risk of mould in-
creases. Too low humidity can lead to health impairments.
Dew Point Temperature
The dew point temperature indicates the temperature at
which the water vapour in the air starts to condense. The dew
point temperature depends on the relative humidity and the
air temperature.
When the temperature of a surface is below the dew point
temperature, water begins to condense on this surface. The
larger the difference of both temperatures and the higher the
relative humidity, the greater the condensation.
Condensate on surfaces is a major cause for the formation of
mould.
Corrective Measure
Charge the battery pack or change the batteries.
change it.
Allow the measuring tool to reach the correct temper-
ature.
Format the internal memory by deleting all images
(see "Delete All Images", page 30). If the problem
persists, send the measuring tool to an authorised
Bosch after-sales service agent.
If required, transfer the images to another storage
medium (e.g. computer or notebook). Then delete
the images in the internal memory.
after-sales service agent.
Send the measuring tool to an authorised Bosch
after-sales service agent.
Check whether the driver on your computer is up to
date. It may be necessary to have a newer operating
system version on your computer.
Check whether the measuring tool can be connected
to a different computer. If not, send the measuring
tool to an authorised Bosch after-sales service agent.
The other functions of the measuring tool can still be
used.
Send the measuring tool to an authorised Bosch
after-sales service agent.
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