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Safety Alerts and Warnings
Hazardous voltage indication
Measurement
V (mV)
Hazardous current indication
Measurement
A
μA/mA
CAUTION
Keysight U1281A/U1282A Quick Start Guide
The multimeter will display the hazardous voltage
( ) symbol as an early precaution when the
measured voltage is:
DC
≥ +30 V or +OL
This symbol will also be displayed when the input
signal exceeds the limitation of measuring circuit as
frequency dependence.
The multimeter will display the hazardous current
( ) symbol as an early precaution when the
measured current has reached the maximum fuse
rating as follows:
DC
≥ +11 A or +OL
≥ 440 mA or +OL
If your measuring current is > 10 A ~ 19.999 A, you
will need to lower the current within a 30-second
time limitation to avoid blowing the multimeter's
fuse.
≤ –30 V or –OL
≤ –11 A or –OL
≤ –440 mA or –OL
AC
≥ 30 V or OL
AC
≥ 11 A or OL
≥ 440 mA or OL
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