10 Keysight U1281A/U1282A Quick Start Guide
10 Keysight U1281A/U1282A Quick Start Guide
Input Warning
The multimeter emits a continuous beep and the 
red LED indicator lights up when:
– the test lead is inserted into the 
 or   
input terminal but the rotary switch is not set to 
the correct current position. The secondary 
display will show 
 or  until the 
test lead is removed. The beeping will stop 
automatically after 5 seconds even if the test 
lead is not removed.
– the rotary switch is set to the current 
measurement position but no lead is inserted 
into its respective input terminal. The secondary 
display will show   and the warning alert 
will stop after approximately 3 seconds.