Model 12-4 Technical Manual Section 5
Ludlum Measurements, Inc. Page 5-2 May 2016
The Model 12-4 Survey Meter is marked with the
following symbols:
CAUTION, RISK OF ELECTRIC SHOCK (per ISO 3864, No. B.3.6):
designates a terminal (connector) that allows connection to a voltage
exceeding 1 kV. Contact with the subject connector while the instrument is
on or shortly after turning off may result in electric shock. This symbol
appears on the front panel.
CAUTION (per ISO 3864, No. B.3.1): designates hazardous live voltage
and risk of electric shock. During normal use, internal components are
hazardous live. This instrument must be isolated or disconnected from the
hazardous live voltage before accessing the internal components. This
symbol appears on the front panel. Note the following precautions:
Warning!
The operator is strongly cautioned to take the following
precautions to avoid contact with internal hazardous live parts
that are accessible using a tool:
1. Turn the instrument power
OFF
and remove the batteries.
2. Allow the instrument to sit for one minute before accessing
internal components.
The “crossed-out wheelie bin” symbol notifies the consumer that the
product is not to be mixed with unsorted municipal waste when discarding;
each material must be separated. The symbol is placed on the battery
compartment lid. See Section 9, “Recycling,” for further information.
The “CE” mark is used to identify this instrument as being acceptable for
use within the European Union.
Cleaning and Maintenance Precautions
The Model 12-4 instrument and detector may be cleaned externally with a
damp cloth, using only water as the wetting agent. Do not immerse the
instrument in any liquid. Observe the following precautions when cleaning
or performing maintenance on the instrument:
1. Turn the instrument
OFF
and remove the batteries.
2. Allow the instrument to sit for one minute before cleaning the
exterior or accessing any internal components for maintenance.
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