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Symbol Title Symbol Description and Reference
Atmospheric pressure
limitation
Indicates the range of atmospheric pressure to
which the medical device can be safely exposed.
ISO 15223, 5.3.9
Humidity limitation
Indicates the range of humidity to which the
medical device can be safely exposed. Source:
ISO 15223, 5.3.8
Green Dot
Indicates a financial contribution to national
packaging recovery company per European
Directive No. 94/62 and corresponding national
law. Packaging Recovery Organization Europe.
ON/”OFF” (push-push)
Indicates connection to or disconnection from the
mains, at least for mains switches or their positions,
and all those cases where safety is involved. Each
position, “ON” or “OFF”, is a stable position. Source:
IEC 60417-5010
Direct current
To indicate on the rating plate that the equipment is
suitable for direct current only or to identify relevant
terminals. Source: IEC 60417-5031
Switch mode power supply
unit
Indicates a device incorporating transformer(s) and
electronic circuitry, that converts electrical power
into single or multiple power outputs. Source:
IEC60417-6190
Transformer type
Indicates product’s switch mode power supply unit
incorporates a short-circuit-proof safety isolating
transformer. Source: DS/EN 61558-2-16
Class II equipment
To identify equipment meeting the safety
requirements for Class II equipment per IEC 61140.
Source: IEC/TR 60878
Lithium or lithium-ion battery
Indicates product should be recycled in accordance
with local, state, and/or government requirements.
Source: ISO 14021
Lithium-ion battery disposal
Indicates disposal of Li-ion batteries as municipal
solid waste is prohibited
Level V Efficiency Standard
Indicates product meets Level V Efficiency Standard
for external power supplies compliance
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