Bosch GML 50 Professional User Manual download pdf (Page 16)

16 | English

2 609 140 773 | (19.10.11) Bosch Power Tools

– Structured surfaces (e.g., roughcast, natural stone).

If required, use the laser target plate 20 (accessory) on these

surfaces.

Furthermore, faulty measurements are also possible when

sighting inclined target surfaces.

Also, air layers with varying temperatures or indirectly re-

ceived reflections can affect the measured value.

Accuracy Check of the Distance Measurement

The accuracy of the distance measurement can be checked as

follows:

– Select a permanently unchangeable measuring section

with a length of approx. 1 to 10 metres; its length must be

precisely known (e.g. the width of a room or a door open-

ing). The measuring distance must be indoors; the target

surface for the measurement must be smooth and reflect

well.

– Measure the distance 10 times after another.

The deviation of the individual measurements from the mean

value must not exceed ± 2 mm (max.). Log the measure-

ments, so that you can compare their accuracy at a later point

of time.

Working with the Tripod (Accessory)

The use of a tripod is particularly necessary for larger distanc-

es. Position the measuring tool with the 1/4" thread 14 onto

the quick-change plate of the tripod 18 or a commercially

available camera tripod. Tighten the measuring tool with the

locking screw of the quick-change plate.

Set the corresponding reference level for measurement with

a tripod by pushing button 6 (the reference level is the

thread).

Troubleshooting – Causes and Corrective Meas-

ures

The measuring tool monitors the correct

function for each measurement. When a de-

fect is determined, only the symbol shown

aside flashes in the display. In this case, or

when the above mentioned corrective

measures cannot correct an error, have the

measuring tool checked by an after-sales service agent for

Bosch power tools.

Maintenance and Service

Maintenance and Cleaning

Store and transport the measuring tool only in the supplied

protective pouch.

Keep the measuring tool clean at all times.

Do not immerse the measuring tool in water or other fluids.

Wipe off debris using a moist and soft cloth. Do not use any

cleaning agents or solvents.

Maintain the reception lens 12 in particular, with the same

care as required for eye glasses or the lens of a camera.

If the measuring tool should fail despite the care taken in man-

ufacturing and testing procedures, repair should be carried

out by an authorised after-sales service centre for Bosch pow-

er tools. Do not open the measuring tool yourself.

In all correspondence and spare parts orders, please always

include the 10-digit article number given on the type plate of

the measuring tool.

In case of repairs, send in the measuring tool packed in its

protective pouch 17.

Cause Corrective Measure

Temperature warning indicator (f) flashing; measure-

ment not possible

The measuring tool is outside the

operating temperature range from

– 10 °C to + 50 °C (in the function

continuous measurement up to

+40 °C).

Wait until the measuring

tool has reached the op-

erating temperature

“ERROR” indication in the display

Addition/Subtraction of measured

values with different units of meas-

ure

Only add/subtract

measured values with

the same units of meas-

ure

The angle between the laser beam

and the target is too acute.

Enlarge the angle be-

tween the laser beam

and the target

The target surface reflects too in-

tensely (e.g. a mirror) or insuffi-

ciently (e.g. black fabric), or the

ambient light is too bright.

Work with the laser tar-

get plate 20 (accessory)

The laser beam outlet 11 or the re-

ception lens 12 are misted up

(e.g. due to a rapid temperature

change).

Wipe the laser beam out-

let 11 and/or the recep-

tion lens 12 dry using a

soft cloth

Calculated value is greater than

999999 m/m

Divide calculation into

intermediate steps

Measuring result not plausible

The target surface does not reflect

correctly (e.g. water, glass).

Cover off the target sur-

face

The laser beam outlet 11 or the re-

ception lens 12 are covered.

Make sure that the laser

beam outlet 11 or the re-

ception lens 12 are un-

obstructed

Wrong reference level set Select reference level

that corresponds to

measurement

Obstruction in path of laser beam Laser point must be

completely on target

surface.

The indication remains unchanged or the measuring tool

reacts unexpected after pressing a button

Software error Remove the batteries

and start the measuring

tool again after reinsert-

ing them.

Cause Corrective Measure

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Bosch GML 50 Professional User Manual Page 16

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