34410A AGILENT TECHNOLOGIES, 34410A Datasheet - Page 14

• Manufacturer Part Number: 34410A
• Description: MULTIMETER, DIGITAL, BENCH, 6-1/2 DIGIT
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of 34410A

• Dmm Type: Bench
• Voltage Measuring Range Dc: 100mV To 1000V
• Voltage Measuring Range Ac: 100mV To 750V
• Current Measuring Range Dc: 100µA To 3A
• Current Measuring Range Ac: 100µA To 3A
• Lead Free Status / RoHS Status: na

How to set up the DMM
for fast DC measurements
There are a five key factors
that control measurement
speed for DC measurements:
• Autozero
• Autorange
• Aperture
• Automatic trigger delay
• Peak measurements
When you use autozero, auto-
range, and peak measurements,
you engage an internal software
state machine to control
operations inside the DMM.
This state machine is limited
to about 2000 readings/s, best
case. To achieve readings rates
higher than 2 k readings/s,
the internal state machine
must be disengaged by turning
off autozero, selecting a fixed
range, and disabling peak
measurements.
Autozero occurs after each
measurement of the applied
signal. Internal circuitry disen-
gages the applied signal and
shorts the path from the input
terminal to the A-to-D. Any off-
set is measured and subtracted
from the actual measurement.
This means there are two
readings taken for every mea-
surement. Turning autozero
off saves time because you
make only a single measure-
ment and do not engage the
software state machine.
Autorange makes pre-measure-
ments of the applied signal to
try and determine the best range
to select in order to achieve the
highest resolution measurement.
Autorange is very fast in these
DMMs and can easily track a
120-Hz signal. Autorange will
also take longer when transi-
tioning from the 10 V or
10 Mohm ranges to higher
ranges. Turning autorange
off will disengage the software
state machine.
Aperture is the time the A-to-D
spends integrating the applied
signal. The minimum DC
apertures for the 34410A and
34411A are 100 µs and 20 µs,
respectively. Aperture resolu-
tion is 20 µs; therefore, the
highest sample rate for the
34411A is 50 k readings/s –
20 µs aperture. The next highest
rate is 25 k readings/s –
40 µs aperture.
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The automatic trigger delay
is a programmed setting that
is enabled by default. When
enabled, the DMM determines
the recommended delay based
upon function, range, and
integration time or aperture
time. This delay is associated
with the trigger subsystem.
If disabled, it is disabled for
all functions.
Peak measurements are
designed to be used when
making precision DC measure-
ments. In those cases, the
aperture of the measurement
is usually 1 or more PLCs.
Peak measurements can be
enabled with 6.5 digit DC
measurements and still achieve
1000 readings/s.
SCPI command example to
achieve maximum measurement
speed for DCV:
CONF:VOLT:DC
VOLT:ZERO:AUTO OFF
VOLT:RANGE 1.0
VOLT:APER MIN
or VOLT:NPLC MIN
TRIG:DELAY:AUTO OFF
TRIG:DELAY 0