DMM4040/4050
Users Manual
1-6
Symbols and Terms
The following terms and safety and electrical symbols may appear in the manual or on
the product:
A XW Warning statement identifies conditions or practices that could result in injury
or death.
A W Caution statement identifies conditions or practices that could result in damage to
the Meter or equipment to which it is connected.
XW Warning
To avoid electric shock, personal injury, or death, carefully read
the information under “General Safety Summary” before
attempting to install, use, or service the Meter.
Safety and Electrical Symbols
Symbol Description Symbol Description
W
Risk of danger. Important
information. See manual.
P Display ON / OFF and Meter reset.
X
Hazardous voltage. Voltage > 30 V
dc or ac peak might be present.
J Earth ground
B AC (Alternating Current) E Capacitance
F DC (Direct Current) G Diode
D
or
C
AC or DC (Alternating or Direct
Current)
I Fuse
R
Continuity test or continuity beeper
tone
Y
Digital signal
Y Potentially hazardous voltage U Maintenance or Service
T Double insulated h
Static awareness. Static discharge
can damage parts.
CAT II
Measurement Category II is for
measurements performed on
circuits directly connected to the
low voltage installation.
CAT I
Measurement Category I is for
measurements not directly
connected to mains.
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