Bosch GIS 1000 C Professional Notice Originale page 26

OBJ_BUCH-2270-005.book Page 26 Wednesday, September 21, 2016 5:29 PM
26 | English
Surface-temperature-mode
In surface-temperature-mode, the surface temperature of an
object is measured.
In this mode you can, for example, search for overheated fus-
es or locate heating pipes or hot water pipes.
To switch to surface temperature mode, return to the stand-
ard display screen if not already on it. Then press the left-
hand arrow button 15 or the right-hand arrow button 11 re-
peatedly until the "Surface Temperature" window is dis-
played with a brief explanation of the mode. To hide the expla-
nation prematurely, press the save button 9. To hide the
explanation and immediately start a measurement, press the
measure button 4.
Press the measure button 4 and aim the measuring tool per-
pendicular to the centre of the measuring object. After com-
pletion of the measurement, the surface temperature of the
measuring object most recently aimed at is fixed in the indica-
tor o.
When performing continuous measurements, the most re-
cently measured surface temperature is displayed with the
mark q on the result scale l. The minimum and maximum tem-
perature values of the measurement appear in the indicator k
as soon as the difference between the measured values is
more than 3 °C. This enables you to tell how high the current
measured value is in relation to the temperatures already
measured.
Surface Temperature Alarm
The surface temperature alarm can be used in all modes. You
can set a minimum and a maximum temperature.
If the temperature is below the Minimum Temperature, the
temperature alarm indicator n flashes blue and a warning sig-
nal sounds if the audio signal is switched on.
If the temperature exceeds the Maximum Temperature, the
temperature alarm indicator n flashes red and a warning sig-
nal sounds if the audio signal is switched on.
To use the surface temperature alarm, open the "Main Menu"
(see "Navigating the "Main Menu"", page 28).
– Select the "Functions" submenu.
– Set "Alarm min/max" to "On".
– Set the minimum temperature under "Alarm min".
– Set the maximum temperature under "Alarm max".
The minimum and maximum temperatures are also saved
when you set the alarm to "Off".
Contact Temperature Measurement
Contact temperature measurement enables the temperature
of an object to be measured directly using a conventional
type K thermocouple.
Note: Only use type K thermocouples. Incorrect measuring
results may be obtained if other types of thermocouples are
connected.
Fold open the cover 1 and connect the thermocouple to the
connection 25.
 Read and observe the operating instructions of the
thermocouple.
1 609 92A 211 | (21.9.16)
 For physical reasons, measurement with a type K ther-
mocouple is susceptible to interference from electrical
and magnetic fields. A plausibility check of the display
value is recommended. Sudden shutdown of the tool,
caused by electrical or magnetic interference, does not
impair the function of the tool. We recommend using
Bosch original accessories.
As soon as a thermocouple is connected, the indicator t ap-
pears on the display. The measured value of the indicator is
continually updated. To achieve a reliable result, wait until the
measured value no longer changes. This can take several min-
utes depending on the version of thermocouple.
The contact temperature can be measured in every mode in
addition to the surface temperature. However, the surface
temperature is always used to determine thermal bridges and
mould risk.
If the thermocouple is removed, the function indicator t extin-
guishes on the display. Close the cover 1 again after removing
the thermocouple.
Thermal-bridge-mode
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 30).
To switch to thermal bridge mode, return to the standard dis-
play screen if not already on it. Then press the left-hand arrow
button 15 or the right-hand arrow button 11 repeatedly until
the "Thermal Bridge" window is displayed with a brief expla-
nation of the mode. To hide the explanation prematurely,
press the save button 9. To hide the explanation and immedi-
ately start a measurement, press the measure button 4.
Press the measure button 4 and aim the measuring tool per-
pendicular to the centre of the measuring object. After com-
pletion of the measurement, the surface temperature of the
measuring object most recently aimed at is fixed in the indica-
tor o and the ambient temperature in the indicator i.
The measuring tool automatically compares the values and
shows the interpretation of the values with the mark q on the
result scale l:
– Mark q in green range (temperature difference <3.5 °C):
Slight temperature difference; no thermal bridges present
– Mark q in yellow range (temperature difference 3.5 °C to
6.5 °C): Temperature difference is borderline; there may
possibly be a thermal bridge in the measuring area. The in-
sulation may be inadequate at this position. Repeat the
measurement if necessary at a later point in time. When
doing so, pay attention to external conditions which can af-
fect the measurement, e.g. whether the measuring surface
is heated up by direct sunlight or the measuring surface is
next to an open door and the fresh air temporarily lowers
the temperature.
– Mark q in red range (temperature difference >6.5 °C): The
surface temperature within the measuring surface devi-
ates significantly from the ambient temperature. There is a
thermal bridge in the measuring area, which is an indica-
tion of poor insulation.
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