3B Scientific GmbH ▪ Ludwig-Erhard-Str. 20 ▪ 20459 Hamburg ▪ Germany ▪ www.3bscientific.com
Subject to technical amendments
© Copyright 2022 3B Scientific GmbH
10. Battery, care and maintenance
10.1 Battery testing:
Batteries which are discharged and have not been
used for a while may leak.
Check the amount of charge left in
the battery from time to time.
Flat or leaking batteries should be
removed from the meter.
If the Escola 30 goes unused for a
long period:
Remove the Escola 3
0’s battery
before reusing.
10.2 Changing the battery:
Before opening the casing:
Turn off the Escola 30.
Disconnect all measuring leads.
The polarity is indicated by plus and minus signs
inside the fuse holder compartment. A mechanical
system ensures the battery makes no contact if it
is inserted the wrong way round.
Unscrew the back of the casing.
Replace flat batteries with 1.5-V alkaline bat-
teries of size AA IEC LR6.
Place the negative pole of the battery on the
spring.
Close casing again.
10.3 Cleaning:
For cleaning, use a soft cloth, slightly mois-
tened with alcohol, or a brush.
Electrostatic charging of the display window can
affect the measurements under certain circum-
stances:
To remove such charge, use a soft cloth
slightly soaked in alcohol or a paint brush.
Dirt or moisture in the measurement sockets can
affect readings.
Shake out any dirt that may be in the meas-
urement sockets.
Soak a new swab with isopropyl alcohol and
work around the inside of each measurement
socket.
11. Disposal
The packaging should be disposed of at local
recycling points.
Should you need to dis-
pose of the equipment
itself, never throw it
away in normal domes-
tic waste. If being used
in private households it
can be disposed of at
the local public waste
disposal authority.
Comply with the applicable regulations for the
disposal of electrical equipment.
Do not dispose of the batteries in the regular
household garbage. Follow the applicable le-
gal regulations (UK: Waste Batteries and Ac-
cumulators Regulations, EU: 2006/66/EC).
12. Symbol legend
Hazard, read instruction sheet
Moving coil galvanometer
Apparatus with electronic amplifier
DC quantities accuracy class 2
AC quantities accuracy class 3
Use in vertical position
Use in horizontal position
Dial position when turned off
Dial position for battery test when bat-
tery charge is satisfactory
Meter on for AC and DC measurements
Meter on for measurements with centre
zero point
Meter switched off
Battery test
EU conformity mark
Electrical safety assured by double in-
sulation
Do not dispose in normal domestic
waste
For use indoors only
