User`s guide

Introduction 1
Preparing Your Multimeter
U1273A/U1273AX User’s Guide 9
Your multimeter provides a voltage alert for voltage
measurements in both auto- ranging and manual range
modes. The multimeter starts beeping periodically once the
measured voltage exceeds the alert value (regardless of
polarity) set in the setup menu.
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 the overvoltage
alert” on page 126.
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
Error ON A INPUT or Error ON mA INPUT when the test lead is
inserted into the µA mA or A input terminal but the rotary
switch is not set to the correct current position.
CAUTION
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.