Keysight U1251B Guia Del Usuario página 153

Performance Tests and Calibration 6
Charge terminal alert test
This test determines if the charge terminal alert is operating properly.
The meter sounds an alert when the terminal detects a voltage level of
more than 5 V and the rotary switch is not set to the position. The meter
sounds an alert beep and the primary display flashes the "Ch.Err" until the lead is
removed from the terminal.
Figure 6-3 Charge terminal alert
Before conducting this test, make sure the beep function is not disabled at
NOTE
setup.
Keysight U1251B and U1252B User's and Service Guide 151