Bosch 0603683000 Original Instructions Manual page 14

OBJ_BUCH-1625-003.book Page 14 Wednesday, September 7, 2016 11:24 AM
14 | English
Measuring Surface for Surface-temperature Measure-
ments
The laser circle generated by the measuring tool indicates the
measuring surface; its infrared radiation is determined in the
course of the contact-free surface-temperature measure-
ment.
The centre laser point marks the centre of the measuring sur-
face. For optimal measuring results, align the measuring tool
in such a manner that the laser beam impinges perpendicular-
ly on this point of the measuring surface.
 Do not point the laser beam at persons or animals and
do not look into the laser beam yourself, not even from
a large distance.
The size of the laser circle and thus of the measuring surface
increases with the clearance between the measuring tool and
the object being measured. The optimal measuring distance
is 0.5 m to 1 m.
 Do not hold the measuring tool directly against hot sur-
faces. The measuring tool can be damaged through heat.
The indicated measuring result is the mean value of the mea-
sured temperatures within the measuring surface.
Notes on the Measuring Conditions
Highly reflecting or transparent surfaces (e.g., shiny tiles,
stainless steel fronts or cooking pots) can affect the surface-
temperature measurement. If necessary, mask off the mea-
suring surface with a dark, matt tape that conducts heat well.
Allow the tape to briefly acclimatize to the surface.
On condition of the principle, taking measurements through
transparent materials is not possible.
The accuracy and reliability of the measuring results increase
with better and more stable measuring conditions.
The humidity and temperature sensor 1 can become dam-
aged through chemical contaminants, such as through the
evaporation of paints or enamels. The infrared temperature
measurement is affected through smoke, steam or dusty air.
Therefore, ventilate the room before measuring, especially
when the air is contaminated or steamy. For example, do not
apply a measurement in the bathroom directly after shower-
ing.
After ventilating, allow the room to acclimatize for a while until
the usual temperature has been reached again.
Ambient temperature and relative humidity are measured di-
rectly on the measuring tool via the humidity and temperature
sensor 1. To achieve substantial results, do not hold the
measuring tool directly above or next to interference sources
such as radiators or open liquids. Make sure not to cover off
the sensor 1.
Measuring Functions
Single Measurement
Briefly pressing the measuring button 4 once switches the la-
ser on and actuates a single measurement in the selected
mode.The measuring procedure can take 1 to 2 seconds and
is indicated through rotating display segments in line l.
The laser beam is switched off automatically upon completion
of the measurement.
1 609 92A 1YH | (7.9.16)
The last measuring results are indicated on the display; the
"HOLD" m indicator flashes additionally. The signal LED re-
mains unchanged for the last indication.
Continuous Measurement (Tracking)
For continuous measurements, press and hold measuring
button 4 in the selected mode. The laser remains switched
on. Moving slowly, point the laser circle at all surfaces requir-
ing temperature measurement, one after the other. For hu-
midity and ambient-temperature measurements, slowly
move the measuring tool around in the room.
The display indication as well as the signal LED 8 are continu-
ously updated. As soon as releasing the measuring button 4,
the measurement is interrupted and the laser is switched off.
The last measuring results are indicated on the display; the
"HOLD" m indicator flashes additionally. The signal LED re-
mains unchanged for the last indication.
Surface-temperature-mode (see figure A)
In surface-temperature-mode, the surface temperature of an
object is measured.
To switch to surface-temperature-
mode, press the surface-tempera-
ture-mode button 11. The surface-
temperature-mode indicator k
appears on the display for confir-
mation.
Press measuring button 4 and
point the laser circle perpendicularly against the centre of the
object being measured. Upon completion of the measure-
ment, the measured surface temperature is displayed in line l.
In surface-temperature-mode, the signal LED 8 does not light
up.
This mode, as an example, is suitable for measuring the tem-
perature of radiators, underfloor heating systems or refriger-
ator interiors.
Thermal-bridge-mode (see figure B)
In thermal-bridge-mode, surface and ambient temperature
are measured and compared with each other. In case of larger
differences between both temperatures, a thermal-bridge
warning is indicated (see "Thermal Bridge", page 16).
To switch to thermal-bridge-
mode, press the thermal-bridge-
mode button 10. The thermal-
bridge-mode indicator j appears
on the display for confirmation.
Press measuring button 4 and
point the laser circle perpendicu-
larly against the centre of the object being measured. Upon
completion of the measurement, the measured surface tem-
perature is displayed in line l and the measured ambient tem-
perature in line a.
The measuring tool automatically compares the values and in-
terprets the results as follows:
– Green signal LED 8: Low temperature difference, no ther-
mal bridges given.
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