What are you looking for?
Tip 8: Continuity Test
The Keysight 34401A multimeter offers continuity test, a quick way to determine if a resistance is below a given threshold. When measuring continuity, the multimeter emits a continuous tone if the measured resistance is less than the threshold resistance. The continuity test is performed on a fixed range 1kΩ (1mA current source) and is made with 5½ digits of resolution. The default threshold resistance is 10 ohms but can be changed from 1 to 1000 ohms. It is important to note, that the threshold value can only be set from the front panel and is stored in non-volatile memory. The threshold resistance is not affected by power being removed or a reset command being received. The "BEEPER ON/OFF" control does not affect the continuity tone, which is always enabled.
The 34401A also offers a Diode Test while not a pure resistance measurement it uses the same hardware, a 1 mA current source and the resulting voltage measured on the 1Vdc range. The beeper will indicate a forward biased diode the measured voltage needs to be equal to or greater than .3 Volts but less than or equal to .8 Volts. The threshold is not adjustable but the beeper can be enabled or disabled (BEEPER ON/OFF).
Math functions such as null, limit, and statistics cannot be used in combination with the continuity or diode test.