Bosch Professional GLM 400 Series Original Instructions Manual page 15

Assembly
Inserting/changing the batteries
It is recommended that you use alkaline manganese batteries to operate the measuring
tool.
With 1.2 V batteries fewer measurements may be possible than with 1.5 V batteries.
Press the locking mechanism (10) to open the battery compartment cover (9) and re-
move the battery compartment cover. Insert the batteries. When inserting the batteries,
ensure that the polarity is correct according to the illustration on the inside of the battery
compartment.
When the empty battery symbol first appears on the display, approx. 100 measurements
are still possible. When the battery symbol is empty and flashes red, no further measure-
ments are possible. Replace the batteries.
Always replace all the batteries at the same time. Only use batteries from the same man-
ufacturer and which have the same capacity.
Take the batteries out of the measuring tool when you are not using it for a pro-
u
longed period of time. The batteries can corrode and self-discharge during pro-
longed storage.
Operation
Start-Up
Never leave the measuring tool unattended when switched on, and ensure the
u
measuring tool is switched off after use. Others may be dazzled by the laser beam.
Protect the measuring tool from moisture and direct sunlight.
u
Do not expose the measuring tool to any extreme temperatures or variations in
u
temperature. For example, do not leave it in a car for extended periods of time. In
case of large variations in temperature, allow the measuring tool to adjust to the ambi-
ent temperature before putting it into operation. The precision of the measuring tool
may be compromised if exposed to extreme temperatures or variations in temperat-
ure.
Avoid hard knocks to the measuring tool or dropping it. Always carry out an accur-
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acy check before continuing work if the measuring tool has been subjected to severe
external influences (see "Accuracy check of the distance measurement", page 22).
Bosch Power Tools
English | 15
1 609 92A 5G9 | (06.11.2019)