
METREL MD 9880
Safety
5
2.
Safety
Symbols
This symbol adjacent to another symbol, terminal or operating device
indicates that the operator must refer to an explanation in the User
manual to avoid personal injury or damage to the meter.
This
WARNING
symbol indicates a potentially hazardous situation that
could result in death or serious injury if not avoided.
This
CAUTION
symbol indicates a potentially hazardous situation that
may result in damage to the product if not avoided.
Terminals with this marking must not be connected to voltage
exceeding 600 V in DC or AC in respect to earth.
Terminals with this marking can be subjected to particularly high
voltages during normal use. For maximum safety, the meter and the
leads should not be handled while these terminals are energized.
Indicates electrical protections with double insulation.
Description of protection categories by standard IEC/EN 61010
1. Overvoltage category I
Equipment with CAT I protection is only to be connected to circuits where protection
measures for limiting the transient over-voltages to acceptably low values are
observed.
NOTE:
Examples include protected electronic circuits.
2. Overvoltage category II
Equipment with CAT II is can be connected to fixed installations with overvoltage
protection in place.
NOTE:
Examples include household, office, and laboratory appliances.