Keysight U1281A Guide De L'utilisateur page 29

Alerts and warnings during measurement
Hazardous voltage indication
The multimeter will display the hazardous voltage ( ) symbol as an early precaution when
the measured voltage is equal to or greater than 30 V or when OL occurs. The following
table shows the voltage measurement modes affected:
Table 1-2
Hazardous current indication
The multimeter will display the hazardous current ( ) symbol as an early precaution when
the measured current reaches the maximum fuse rating or when OL occurs. 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.The following table shows
the current measurement modes affected:
Table 1-3
Keysight U1281A/U1282A User's Guide
Hazardous voltage indication table
Measurement
V (mV) ≥ +30 V or +OL
Hazardous current indication table
Measurement
A ≥ +11 A or +OL
μA/mA ≥ 440 mA or +OL
DC
≤ –30 V or –OL
DC
≤ –11 A or –OL
≤ –440 mA or –OL
Introduction 1
AC
≥ 30 V or OL
AC
≥ 11 A or OL
≥ 440 mA or OL
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