1 Introduction
Preparing Your Multimeter
28 U1271A/U1272A User’s Guide
Alerts and warnings during measurement
Voltage alert
Your multimeter provides a voltage alert for voltage
measurements in both autoranging and manual range modes.
The multimeter starts beeping periodically once the
measured voltage exceeds the value (regardless of
polarity) set in the Setup mode. Immediately remove the test
leads from the source being measured.
By default, this feature is turned off. Be sure to set the alert
voltage according to your test requirements. To change the
alert voltage level, refer to “Enabling and disabling the
overvoltage alert” on page 140.
Hazardous voltage indication
The multimeter will also display the hazardous voltage ( )
symbol as an early precaution when the measured voltage is
equal to or greater than 30 V in all voltage measurement
modes.
Input warning
The multimeter emits a continuous beep and displays
or when the test lead is inserted into the or
input terminal but the rotary switch is not set to the
correct current position.
For your own safety, please do not ignore the voltage alert. When the
multimeter cautions you with a voltage alert, immediately remove
the test leads from the source being measured.
To avoid circuit damage and possibly blowing the multimeter’s current
fuse, do not place the probes across (in parallel with) a powered circuit
when a lead is plugged into a current terminal. This causes a short
circuit because the resistance through the multimeter's current
terminals is very low.
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