User`s guide

Remarks
This command is supported by the 34411A and L4411A.
This command is supported only for ac and dc voltage, ac and dc current,
and 2-wire and 4-wire resistance measurements.
To use the trigger level you must select INTernal as the trigger source with
the TRIGger:SOURce command.
If a manual range is selected, the accuracy of the trigger level is ±1
percent of the selected range. If autoranging is in use (not recommended),
accuracy is ±1 percent of the most appropriate range for the specified
trigger level. For example, if you have set a trigger level of 8 Vdc with
autoranging, the accuracy of the trigger level is ±1 percent of the 10 Vdc
range, or 0.1 Vdc.
The hysteresis of the trigger level is 1 percent of the current manual
range. If autoranging is in use (not recommended), hysteresis is 1 percent
of the most appropriate range for the specified trigger level.
If you are using a wide aperture (NPLC or aperture mode) and the signal
level varies significantly within the aperture, you may get an unexpected
variation in the magnitude of the triggered measurement from the
specified trigger level.
If you do not specify a trigger delay with the TRIGger:DELay command, the
automatic trigger delay applies. It is recommended that you set a shorter
delay, or delay = 0, for level triggering.
The trigger level is set to the default value ("0") after a Reset (*RST
command) or an Instrument Preset (SYSTem:PRESet command).
It is recommended that all triggered measurements be made using an
appropriate fixed manual range. That is, turn autorange off
(SENSe:<function>:RANGe:AUTO OFF), or set a fixed range using the
SENSe:<function>:RANGe, CONFigure, or MEASure command.
If the selected trigger source is invalid due to a settings conflict, the source
reverts automatically to IMMediate on an INIT. For an INTernal trigger on
a level, this will happen if you select a manual range and then set a trigger
level outside ±120 % of that range. A settings conflict error message is
also generated.