Specifications

34420A Nanovolt/Micro-ohm Meter
The Agilent 34420A sets a price/
performance standard in low-level
measurement capability. The noise
performance of the 34420A
nanovolt/micro-ohm meter is
more than an order of magnitude
better than that previously
available from Hewlett-Packard.
Accurate, Repeatable Low-Level
Measurements
A shielded copper pin screw-down
connector, a 7
1
/
2
digit A/D, converter
2 ppm basic DC accuracy, and a new
measurement algorithm that gives
100 dB normal mode rejection
without front-end filtering result
in measurement capability you can
depend on to make accurate and
repeatable low-level measurements.
Low noise input amplifiers and
a highly-tuned input protection
scheme bring reading noise down
to 8 nVp-p. Longer integration
times improve noise performance
even further.
Math Functions Enhance Capabilities
Math functions such as NULL,
STATS, and SCALE ease the capture
of minimum and maximum read-
ings, provide averages and standard
Digital Multimeters
More detailed specifications at www.agilent.com/find/34420A
165
7
1
/
2
digit resolution 1 mV to 100 V ranges
1.3 nV rms noise/8 nVp-p SCPI and Keithley 181 languages
100 pV, 100 nΩ sensitivity Direct SPRT, RTD, Thermistor, and thermocouple
Two-channel programmable voltage input;
temperature measurements
difference and ratio functions IntuiLink Connectivity Software included
34420A
Nanovolt/Micro-ohm Meter
34420A
error. Low power ohms and a
low-voltage resistance measure-
ment capability allow repeatable
measurements to be made where
a low voltage (20 mV) is required
to avoid oxidation punch-through.
A wide range of temperature
measurement capabilities are also
built in, providing support for SPRT,
thermocouple, RTD, and thermistor
temperature sensors.
Built-in Versatility
You will find that the 34420A will
fit equally well into your bench or
your system applications. Designed
with the bench user in mind,
operation of the 34420A from the
front panel is straightforward and
intuitive. For system applications,
the 34420A includes both GPIB and
RS-232 interfaces standard, and
uses Standard Commands for
Programmable Instrumentation
(SCPI). This ensures both present
and future compatibility. The
34420A also responds to commands
for the Keithley 181 nanovoltmeter.
deviation, scale your measurement
results, and ultimately makes it
easier for you to characterize your
input signal. The 34420A can also
store up to 1024 readings in
internal memory.
Agilent IntuiLink: Easy Data Access
The Included Agilent IntuiLink
software allows your captured data
to be put to work easily, using PC
applications such as Microsoft
Excel or Microsoft Word, to analyze,
interpret, display, print, and
document the data you get from
the 34420A. To find out more
about IntuiLink, visit
www.agilent.com/find/intuilink
Unprecedented Functionality
Two input channels allow
voltage measurements to be made
independently, or they can be
mathematically combined to make
difference and ratio measurements.
Ohms measurements combine
the low-noise input circuits with
a highly-stable current source to
provide outstanding low-resistance
measurements. Offset compensation
is employed to eliminate the effects
of stray thermal EMFs that would
otherwise result in measurement