Manual Bosch PTD 1 (page 13 of 87) (English, German, Dutch, Danish, French, Italian, Portuguese, Spanish, Norwegian)

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Bosch Power Tools 2 609 140 909 | (5.7.12)

f Remove the batteries/rechargeable batteries from the

measuring tool when not using it for longer periods.

When storing for longer periods, the batteries/rechargea-

ble batteries can corrode and discharge themselves.

Operation

Initial Operation

f Protect the measuring tool against moisture and direct

sun light.

f Do not subject the measuring tool to extreme tempera-

tures or variations in temperature. As an example, do

not leave it in vehicles for long time. In case of large varia-

tions in temperature, allow the measuring tool to adjust to

the ambient temperature before putting it into operation.

In case of extreme temperatures or variations in tempera-

ture, the accuracy of the measuring tool can be impaired.

f Avoid heavy impact to or falling down of the measuring

tool.

f Do not shut or cover off the humidity and temperature

sensor 1, the reception lens 2 and the laser beam exit

opening 3.

Switching On and Off

For switching on the measuring tool, the following possibili-

ties are given:

– Switch the measuring tool on with the On/Off button 13.

After a short start-up sequence, the measuring tool is

ready for operation with the settings (operating mode,

emission degree) saved after switching off last. A meas-

urement is not started as yet and the laser is switched off.

– Switch the measuring tool on with the measuring button

4. After a short start-up sequence, the laser is switched on

and the measuring tool immediately starts a measurement

with the settings (operating mode, emission degree)

saved after switching off last.

f 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.

To save energy, the brightness of the display illumination is

reduced 30 seconds each time after pressing a button. After

pressing any button, the display illumination is switched on

again at full brightness.

To switch the measuring tool off, press the On/Off button 13.

When no button on the measuring tool is pressed for approx.

4 minutes, the measuring tool automatically switches off to

save the batteries.

Preparing for Measurement

Setting the Emissivity Degree for Surface-temperature

Measurements

To determine the surface temperature, the natural infrared

heat radiation emitted by the object is measured contact-

free. For correct measurements, the emissivity degree set on

the measuring tool (see “Emissivity Degree”, page 15) must

be checked and if required, adapted to the object being meas-

ured prior to each measurement.

You can select between three emissivity degrees. The com-

monly used materials specified in the Table below are exem-

plary for selection of the emissivity degree to be used.

To change the emissivity degree, press the emissivity degree

button 14 until the appropriate emissivity degree for the next

measurement is indicated in display element g.

f Correct surface-temperature indications are only pos-

sible when the set emissivity degree and the emissivity

degree of the object correspond. Correct notes on ther-

mal bridges and the risk of mould thus also depend on the

set emissivity degree.

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 measurement.

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.

f 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.

f 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 meas-

ured 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 meas-

uring 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.

High emissivity degree: Concrete (dry), bricks

(red, course), sandstone (course), marble, roof-

ing felt, stucco (course), mortar, gypsum, parquet

flooring (matt), flooring panels, PVC, carpet, wall-

paper (patterned), tiles (matt), glass, aluminium

(anodised), enamel, wood, rubber, ice

Medium emissivity degree: Granite, paving

stone, fibre board, wallpaper (lightly patterned),

varnish (dark), metal (matt), ceramic, leather

Low emissivity degree: Porcelain (white),

varnish (light), cork, cotton

For the selected examples, an emissivity degree is indicated as follows:

– High emissivity degree: 0.95

– Medium emissivity degree: 0.85

– Low emissivity degree: 0.75

OBJ_BUCH-1625-001.book Page 13 Thursday, July 5, 2012 8:56 AM

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Bosch PTD 1 Manual

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