Prodigit 3350F Series Operation Manual page 2

Direct current (DC)
Alternating current (AC)
Both direct and alternating
Three-phase alternating
Protective earth
On (Supply)
Off (Supply)
Fuse
Caution！Refer to this manual before using the meter.
Caution, risk of electric shock
– Is for measurements performed at the source of the low-voltage
CAT IV
installation.
– Is for measurements performed in the building installation.
CAT III
– Is for measurements performed on circuits directly connected to the
CAT II
low-voltage installation.
– Is for measurements performed on circuits not directly connected to
CAT I
SAFETY SYMBOLS