Agilent L4411A
‘Low profile’ 6½ Digit Multimeter
Leading the Industry in High-Performance
System Test
Product Overview
Agilent L4411A
6½-Digit High-
Performance DMM
• 50,000 readings/sec @ 4½ digits
direct to PC
• 10,000 readings/sec @ 5½ digits
direct to PC
• 1,000 readings/sec @ 6½ digits
direct to PC
• Analog level triggering
• Programmable pre/post triggering
• LAN extensions for instruments
(LXI), USB & GPIB standard
• 30 PPM 1 year basic DC accuracy
• DCV, ACV, DCI, ACI, 2-wire and
4-wire resistance, frequency,
period, and diode test
• Capacitance & temperature
measurements
• Expanded measurement ranges
A new standard for modular
system DMMs
The L4411A 6½ digit high performance
DMM expands Agilent’s industry
leading offering of LXI system
products. For the test system integra-
tor looking for the next generation
modular DMM, this new meter offers
the industry’s best measurement
speed and throughput, a reduced size
(1 rack unit high), superior measure-
ment performance, and a choice of
computer interfaces, including LXI,
providing high performance, easy
to use, economical I/O. A simple
display, including ‘latest reading’
and LAN address, allows the system
integrator to quickly integrate and
debug the test system. And finally,
the DMM comes with a compatibility
mode, requiring little-to-no code
change to upgrade your test system
with next generation capabilities.
Dramatic system performance
Whether it’s raw reading speed or
fast system throughput, the L4411A
sets a new benchmark in performance.
Using a new A/D technology, the
L4411A achieves an impressive
50,000 readings a second at 4½ digits,
and can stream readings to your
computer at this same speed!
Transactional I/O (single reading—
measurement and PC transfer time) is
3x faster than other popular modular
DMMs, significantly enhancing your
test throughput. Triggering is fast and
precise, with both trigger latency and
trigger jitter less than 1 µs, while bus
query response is less than 500 µs.
ACV measurements are faster as
well thanks to a digital measurement
technique that additionally improves
accuracy at high and low frequencies.
LXI—Class C
LAN Extensions for Instruments (LXI)
provides the next generation I/O for
system applications requiring high
throughput. Transfer rates of over
250,000 readings/sec are attainable
ensuring even the most data intensive
measurements are fast, without the
overhead cost of an instrument
mainframe. LXI provides a built-in
Graphical Web Interface that allows
you to interactively control the DMM
without the hassle of programming,
making it great for debugging your
system. The L4411A DMM is LXI —
Class C compliant.
commands for programmable instru-
mentation (SCPI). Additionally there is
a 34401A/E1412A emulation mode to
ensure the easiest upgrade possible,
virtually eliminating costly software
and documentation changes. The
autoranging power supply allows
you to connect to any input power
without selecting input voltages or
changing fuses. Agilent’s I/O Library
Suite ships with the L4411A to help
you quickly establish an error-free
connection between your PC and
instrument. It provides robust instru-
ment control and works with the
software development environment
you choose.
DMM dimensions (mm)
212.3
363.2
Enhanced measurement
capabilities
The L4411A offers temperature and
capacitance capabilities in addition to
those measurements you have come
to expect such as DCV, ACV, DCI,
ACI, 2-wire and 4-wire resistance,
frequency, period and diode test. You
also get offset compensated Ohms,
allowing you to accurately measure
resistance in the presence of volt-
ages. Measurement ranges have been
expanded as well; for example, DC
and AC current ranges now go down
to 100 µA, resulting in 100 pA resolu-
tion. Real-time math and statistics are
included, and a peak-detect capability
allows you to capture peaks as short
as 20 µs.
Companion LXI switch modules
Need a switch to route your signal
to the L4411A? Consider Agilent’s
LXI switch modules. Choose from a
40-channel armature relay multiplexer
(L4421A), a dual/quad 4x8 reed relay
matrix (L4433A) or a 32-channel Form
A/C general purpose relay switch
module (L4437A). Additionally, Agilent
has LXI DAC, digital I/O and multi-
function modules to help complete
your test system requirements. All
from the leader in LXI instrumenta-
tion, Agilent Technologies.
40.9
Accessories included:
Test report, power cord, LAN
cross-over interface cable.
Product reference CD-ROM
(34410-13601)
• Software
◦ IntuiLink software
◦ IVI-COM driver
◦ LabView driver
◦ Example programs
• Online documentation
◦ Programmer’s reference
◦ Getting started guide
◦ User’s guide
◦ Service guide
◦ Localized manuals
Agilent I/O Libraries CD-ROM
(E2094-60003)
Built to last
Our new DMM was designed to high
standards of ruggedness and reliabil-
ity. From the robust, compact package
to careful selection of components
and conservative circuit design, this
meter is built to last. Calculated mean
time between failure (MTBF) is in
excess of 100,000 hours. Backed by
a 1-year warranty and a worldwide
network of service centers, you can
buy with confidence.
System integration
When deciding on your next system
DMM you can’t go wrong with the
L4411A. Choose from LAN (LXI),
USB or GPIB interfaces, all standard
on the L4411A, to connect to your
computer. The 1U size is perfect
for space constrained applications
like aerospace/defense depot test.
Concerned about the viability of your
existing software programs? This
new DMM responds to standard
Go to the web
For the latest information on these
or other Agilent DMMs, go to
www.agilent.com/find/dmm
2
Accuracy Specifications ± (% of reading + % of range)
1
Function
Range
3
Frequency,
test current or
burden voltage
24 hour
2
Tcal ±1°C
90 day
Tcal ±5°C
0.0040 + 0.0035
0.0030 + 0.0007
0.0020 + 0.0005
0.0035 + 0.0006
0.0035 + 0.0006
0.50 + 0.03
0.10 + 0.03
0.04 + 0.02
0.08 + 0.025
0.20 + 0.040
1.20 + 0.250
0.008 + 0.004
0.007 + 0.001
0.007 + 0.001
0.010 + 0.001
0.030 + 0.001
0.600 + 0.001
6.000 + 0.001
0.040 + 0.025
0.030 + 0.006
0.030 + 0.020
0.030 + 0.005
0.080 + 0.010
0.120 + 0.020
0.10 + 0.04
0.20 + 0.04
0.070 + 0.000
0.040 + 0.000
0.020 + 0.000
0.006 + 0.000
0.50 + 0.50
0.40 + 0.10
0.40 + 0.10
0.40 + 0.10
0.40 + 0.10
0.06 °C
0.08 °C
0.008 + 0.020
1 year
Tcal ±5°C
0.0050 + 0.0035
0.0035 + 0.0007
0.0030 + 0.0005
0.0040 + 0.0060
0.0040 + 0.0060
0.50 + 0.03
0.10 + 0.03
0.045 + 0.02
0.090 + 0.025
0.200 + 0.040
1.200 + 0.250
0.010 + 0.004
0.010 + 0.001
0.010 + 0.001
0.012 + 0.001
0.040 + 0.001
0.800 + 0.001
8.000 + 0.001
0.050 + 0.025
0.050 + 0.006
0.050 + 0.020
0.050 + 0.005
0.100 + 0.010
0.150 + 0.020
0.10 + 0.04
0.20 + 0.04
0.070 + 0.000
0.040 + 0.000
0.020 + 0.000
0.007 + 0.000
0.50 + 0.50
0.40 + 0.10
0.40 + 0.10
0.40 + 0.10
0.40 + 0.10
0.06 °C
0.08 °C
0.010 + 0.020
Temperature coefficient/°C
0 °C to (Tcal -5°C)
(Tcal +5°C) to 55°C
0.0005 + 0.0005
0.0005 + 0.0001
0.0005 + 0.0001
0.0005 + 0.0001
0.0005 + 0.0001
0.010 + 0.003
0.008 + 0.003
0.005 + 0.002
0.010 + 0.0025
0.020 + 0.0040
0.120 + 0.0200
0.0006 + 0.0005
0.0006 + 0.0001
0.0006 + 0.0001
0.0006 + 0.0001
0.0010 + 0.0002
0.0030 + 0.0004
0.1000 + 0.0001
1.0000 + 0.0001
0.0020 + 0.0030
0.0020 + 0.0005
0.0020 + 0.0020
0.0020 + 0.0005
0.0050 + 0.0010
0.0050 + 0.002
0.015 + 0.006
0.030 + 0.006
0.005 + 0.000
0.005 + 0.000
0.001 + 0.000
0.001 + 0.000
0.05 + 0.05
0.05 + 0.01
0.01 + 0.01
0.01 + 0.01
0.01 + 0.01
0.003 °C
0.002 °C
0.0010 + 0.0020
DC voltage
True RMS
AC voltage
5
100.0000 mV
1.000000 V
10.00000 V
100.0000 V
1000.000 V
4
100.0000 mV
to 750.000 V
Resistance
6
DC current
True RMS
AC current
7
Frequency
or period
100.0000 Ω
1.000000 kΩ
10.00000 kΩ
100.0000 kΩ
1.000000 MΩ
10.00000 MΩ
100.0000 MΩ
1.000000 GΩ
100.0000 µA
1.000000 mA
10.00000 mA
100.0000 mA
1.000000 A
3.000000 A
100.0000 µA
to 3.00000 A
100 mV
to 750 V
Capacitance
8
1.0000 nF
10.000 nF
100.00 nF
1.0000 µF
10.000 µF
0.0030 + 0.0030
0.0020 + 0.0006
0.0015 + 0.0004
0.0020 + 0.0006
0.0020 + 0.0006
3 Hz – 5 Hz
0.50 + 0.02
5 Hz – 10 Hz
0.10 + 0.02
10 Hz – 20 kHz
0.02 + 0.02
20 kHz – 50 kHz
0.04 + 0.025
50 kHz – 100 kHz
0.10 + 0.040
100 kHz – 300 kHz
1.00 + 0.250
1 mA
0.0030 + 0.0030
1 mA
0.0020 + 0.0005
100 µA
0.0020 + 0.0005
10 µA
0.0020 + 0.0005
5 µA
0.0020 + 0.0010
500 nA
0.0100 + 0.0010
500 nA || 10 MΩ
0.200 + 0.001
500 nA || 10 MΩ
2.000 + 0.001
< 0.03 V
0.010 + 0.020
< 0.30 V
0.007 + 0.006
< 0.03 V
0.007 + 0.020
< 0.30 V
0.010 + 0.004
< 0.80 V
0.050 + 0.006
< 2.0 V
0.100 + 0.020
3 Hz – 5 kHz
0.10 + 0.04
5 kHz – 10 kHz
0.20 + 0.04
3 Hz – 5 Hz
0.070 + 0.000
5 Hz – 10 Hz
0.040 + 0.000
10 Hz – 40 Hz
0.020 + 0.000
40 Hz – 300 kHz
0.005 + 0.000
500 nA
0.50 + 0.50
1 µA
0.40 + 0.10
10 µA
0.40 + 0.10
10 µA
0.40 + 0.10
100 µA
0.40 + 0.10
0.06 °C
0.08 °C
0.002 + 0.010
Temperature
9
RTD
-200 °C to 600 °C
Thermistor
-80 °C to 150 °C
1.0000 V
Diode test
10
1 mA
1. Specifications are for 90 minute warm-up and 100 PLC.
2. Relative to calibration standards.
3. 20% overrange on all ranges, except DCV 1000 V, ACV 750 V, DCI and
ACI 3 A ranges.
4. For each additional volt over ± 500 V add 0.02 mV of error.
5. Specifications are for sinewave input > 0.3% of range and > 1 mVrms.
Add 30 µV error for frequencies below 1 kHz. 750 VAC range limited to 8 x 10
7
Volts-Hz. For each additional volt over 300 Vrms add 0.7 mVrms of error.
6. Specifications are for 4-wire resistance measurements, or 2-wire using
Math Null. Without Math Null, add 0.2 Ω additional error in 2-wire resistance
measurements.
3
7. Specifications are for sinewave input > 1% of range and > 10 µArms.
Frequencies > 5 kHz are typical for 1 A and 3 A ranges.
8. Specifications are for 1-hour warm-up using Math Null. Additional errors may
occur for non-film capacitors.
9. For total measurement accuracy, add temperature probe error.
10. Accuracy specifications are for the voltage measured at the input terminals only.
1 mA test current is typical. Variation in the current source will create some
variation in the voltage drop across a diode junction.
A-to-D converter noise performance
RMS noise (ppm of range)
Integration time
(NPLC)
0.001
0.002
0.006
0.02
0.06
0.2
1
2
10
100
Resolution
(ppm of range)
1
30
15
6
3
1.5
0.7
0.3
0.2
0.1
0.03
Normal mode
rejection (dB)
2
0
0
0
0
0
0
55
110
3
110
3
110
3
Readings/second
4
50,000
25,000
10,000
3,000
1,000
300
60 (50)
30 (25)
6 (5)
0.6 (0.5)
100
10
1
0.1
0.01
0.001
0.01
0.1
1
10
100
1. Resolution is defined as the typical DCV 10 V range RMS noise.
Auto-zero on for NPLC ≥ 1. See manual for additional noise characteristics.
2. Normal mode rejection for power line frequency ± 0.1%.
3. For power-line frequency ± 1% 75 dB and for ± 3% 55 dB.
4. Maximum rate with auto-zero off for 60 Hz and (50 Hz) operation.
System reading and throughput rates
DMM memory to PC (maximum reading rate out of memory)
1
Drawing – Path B
Reading format
ASCII
32-bit binary
64-bit binary
GPIB
readings/sec
4,000
89,000
47,000
USB 2.0
readings/sec
8,500
265,000
154,000
LAN (VXI-11)
readings/sec
7,000
110,000
60,000
LAN (sockets)
readings/sec
8,500
270,000
160,000
System reading architecture
Path ‘A’
DMM
input
ADC
L4411A/
34410A/
DMM memory 34411A
50 k readings DMM
non-volatile
Direct I/O measurements (single reading – measure and I/O time)
1
Drawing – Path C
(readings/sec)
Drawing–Path A or C
Path ‘C’
GPIB
LAN
USB
Function
Resolution
(NPLC)
GPIB
msec
2.6
10.0
USB 2.0
LAN
LAN
msec (VXI-11) (sockets)
msec
msec
2.9
10.0
4.6
10.0
3.2
10.0
Maximum reading
rate into memory
or to direct I/O
Path ‘B’
DCV/2-wire
0.001
resistance
ACV/
Fast filter
frequency
1 ms gate
50,000
500
PC
1. ½ scale input signal, immediate trigger, trigger delay 0, auto-zero off, auto-range off, no math, null off,
60 Hz line frequency. See manual for performance on other functions.
System performance
Function
change
(msec)
1
DCV/2-wire
resistance
ACV/frequency
22
37
Range change Auto-range
LAN/GPIB
(msec)
3
(msec)
2
3.9/2.6
6.5/6.4
7.5
19
Maximum
external
trigger rate
5,000/s
500/s
Maximum
internal
trigger rate
50,000/s
500/s
1. Time to change from 2-wire Resistance to this specified function, or DCV to 2-wire resistance using the
SCPI ”FUNC” command
2. Time to change from one range to the next higher range, ≤ 10 V, ≤ 10 MΩ
3. Time to automatically change one range and be ready for the new measurement, ≤ 10 V, ≤ 10 MΩ
4
Measurement Characteristics
DC voltage
Measurement
method:
Linearity:
(10 V range)
Input
resistance:
Continuously integrating multi-slope IV A/D
converter
0.0002% of reading
+ 0.0001% of range
0.1 V, 1 V, 10 V ranges
100 V, 1000 V ranges
Input bias current: < 50 pA at 25 °C
Input protection: 1000 V
DC CMRR:
140 dB
1
10 MΩ or > 10 GΩ
(selectable)
10 MΩ ±1% (fixed)
Frequency and period
Measurement
method:
Reciprocal-counting technique. AC-coupled
input using the AC voltage measurement
function.
Input impedance: 1 MΩ ± 2% in parallel with < 150 pF
Input protection: 750 Vrms all ranges
Capacitance
Measurement
method:
Connection type:
Current input with measurement of
resulting ramp.
2-wire
True RMS AC voltage
AC-coupled True RMS measurement.
Digital sampling with anti-alias filter.
No additional error for crest factors < 10.
Limited by peak input and 300 kHz bandwidth.
Peak input:
300% of range or 1100 V
Overload
Will select higher range if peak input
ranging:
overload is detected during auto range.
Overload is reported in manual ranging.
AC CMR:
70 dB
2
Maximum input: 400 Vdc, 1100 Vpk
Input impedance: 1 MΩ ± 2% in parallel with < 150 pF
Input protection: 750 Vrms all ranges
Measurement
method:
Crest factor:
Temperature
Thermistor:
RTD:
2.2 kΩ, 5 kΩ, and 10 kΩ
α = 0.00385
R
o
from 49 Ω to 2.1 kΩ
Diode test
Response time:
Continuity
threshold:
300 samples/sec
Fixed at 10 Ω
Operating characteristics
Maximum readings/second
Digits
3
4.5
Function
DCV
50 k
2-wire Ω
50 k
DCI
50 k
Frequency
500
Period
500
Filter setting
fast
ACV
500
ACI
500
Resistance
Measurement
method:
Offset
compensation:
Max. lead
resistance
(4-wire):
Input protection:
Selectable 2-wire or 4-wire.
Current source referenced to LO input.
Selectable on the 100 Ω, 1 kΩ, and 10 kΩ
ranges
10% of range per lead for 100 Ω, 1 kΩ. 1 kΩ
per lead on all other ranges
1000 V on all ranges
5.5
10 k
10 k
10 k
90
90
med
150
150
6.5
1k
1k
1k
10
10
slow
50
50
Additional specifications
Resolution:
Overall bandwidth,
DCV & DCI:
Triggering:
Timebase
resolution:
Trigger jitter:
See table on page 4
15 kHz typical @ 20 µs aperture (-3 dB)
Pre/Post, Analog Level, Int/Ext, Pos/Neg
19.9524 µs 0.01% accuracy
2 µs (p-p), 20 µs (p-p) when pre-triggered
DC current
Current shunt:
200 Ω for 100 µA, 1 mA
2 Ω for 10 mA, 100 mA
0.1 Ω for 1 A, 3 A
3 A, 250 V fuse
Input protection:
True RMS AC current
Measurement
method:
Current shunt:
AC-coupled true RMS measurement.
Directly coupled to the fuse and shunt.
Digital sampling with anti-alias filter.
200 Ω for 100 µA, 1 mA
2 Ω for 10 mA, 100 mA
0.1 Ω for 1 A, 3 A
The peak value of the DC + AC current must
be < 300% of range. The RMS current must
be < 3 A including the DC current content.
3 A, 250 V fuse
Maximum input:
Input protection:
1. For 1 kΩ unbalanced in LO lead, ± 500 V peak maximum
2. For 1 kΩ unbalanced in LO lead and < 60 Hz, ± 500 V peak maximum
3. Maximum rate for DCV, DCI, and resistance functions
(using zero settling delay, autozero off, manual range)
5
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