Specifications

The aperture setting is set to
MIN. For the 34410A, this
would be 100 µs. For the
34411A, 20 µs is the MIN. The
same commands can be used
for DCI, ohms, or temperature
– but you have to change the
VOLT to CURR, RES, FRES,
or TEMP.
Autozero cannot be turned off
when making four-wire ohms
measurements. Temperature
measurements are all resistive
and can be two- or four-wire
measurements.
How to set up the DMM
for fast AC measurements
For AC measurements, the
following are the key factors
in measurement speed:
• AC filter setting
• Autorange
• Automatic trigger delay
All AC measurements are limited
to 500 readings/s or less.
Measurements can be slower
dependent upon the settings of
these three factors. AC filter is
common to all AC measurements
and is the most significant
factor. The response of the
filter affects measurement
speed. See the table below:
The default setting when using
the automatic trigger delay is
shown. If the trigger delay is
set to zero, the maximum
reading rate is possible.
Autorange does not significantly
impact the measurement speed
until a high-voltage signal causes
an actuator relay to change
ranges. The automatic trigger
delay slows down the measure-
ment speed based mainly upon
the selection of the AC filter.
SCPI command example to
achieve maximum measurement
speed for ACV:
CONF:VOLT:AC
VOLT:AC:BAND 200
VOLT:AC:RANGE 1.0
TRIG:DELAY:AUTO OFF
TRIG:DELAY 0
ACI will use the same com-
mands – except for specifying
CURR instead of VOLT. For
frequency, the FREQ:APER
command specifies a gate time
of 0.001, 0.01, 0.1, or 1 second,
which will also affect reading
rates in addition to the AC
filter selection.
Peak-to-peak measurements
do not slow down AC RMS
measurements.
15
Input Frequency Default Settling Delay Maximum Reading Rate
3 Hz - 300 kHz (Slow) 2.5 seconds/reading 50 readings/second
20 Hz - 300 kHz (Medium) 0.625 second/reading 167 readings/second
200 Hz - 300 kHz (Fast) 0.025 second/reading 500 readings/second