Introduction
Ideal for precise measurements of
extremely low resistances using an
ac test signal, the Agilent Technologies
4338B suits bench-top applications
that require f lexible testing and reliable results. The milliohm meter satisfies system throughput demands for
fast, high-quality measurements.
Agilent
4338B Milliohm Meter
10 µΩ to 100 kΩ
Technical Overview
2
Satisfy Your Needs for ...
High-quality testing
• Remove parasitics with error
correction
• Acheive consistent results with
0.4% basic accuracy
• Verify test connections with
contact check function
• Stabilize data with selectable
measurement times and averaging
• Eliminate trigger timing errors
with trigger delay
Operating versatility
• Select from 5 impedance parameters
• Pick from 7 probes, test fixtures,
and accessories
• Configure the instrument quickly
with Save/Recall
• Reduce test complexity with automeasurement function
Fast test throughput
• Get 34 ms/measurement speed
• Perform Pass/Fail testing with
comparator function
• Operate remotely via the GPIB
interface
• Use the built-in handler interface
Key Parameters and Specifications
Test frequency:
1 kHz
Impedance parameter sets:
R, IZI-θ, R-L, R-X
Basic accuracy:
0.4%
Test current levels:
1 µ A, 10 µ A, 100 µ A, 1 mA, 10 mA
Error correction:
Short compensation
Display digits:
3, 4, or 5 digits (selectable)
Save/recall:
10 instrument states
Interfaces:
GPIB and handler interface
The Agilent 4338B
3
Satisfy your need for high-quality testing
• Resolve data to 5 digits
• Make precise measurements with
0.4% basic accuracy
• Eliminate impedance calculations;
select the parameter you need:
R, IZI, θ, L, X
• Verify DUT performance under
simulated operating conditions
• Perform dry contact testing with
minimal test signal (≤ 20 mV)
• Obtain high-confidence testing
with contact check function
Test electromechanical devices
• Perform dry contact testing with
low-level test signals
• Select from a variety of probes and
test fixtures to fit your application
• Resolve measurements to 10 µΩ
• Test switches, cables, connectors,
relays, and pc board traces
Evaluate battery internal resistance
• Protect your investment with
voltage protection on terminals
(Max. 42 Vdc)
• Perform non-invasive testing with
no effects on charge/discharge
cycles
• Avoid polarization effects with an
ac test signal
System features for automation in
manufacturing
• Maximize accuracy with error
correction
• Automate testing with GPIB
interface for computer control
• Reduce ground-loops with isolated
handler interface
• Continue testing after ac power
loss with non-volatile memory
• Perform pass/fail testing with
comparator function (HIGH, IN,
LOW)
Make precise ultra-low resistance measurements with the 4338B.
Use the milliohm meter for electromechanical contact testing.
The 4338B is ideal for battery evaluation.
4
Measurement conditions
The following test conditions apply
for the data shown in Table 1:
1
1. Warm-up time: ≥ 30 minutes
2. Ambient temperature: 23 °C ± 5 °C
3. Test cable length: 0 meter
4. Short error correction performed.
5. Measurement time: LONG
1. Other test-condition data is available in the
operation manual.
Measurement
parameters/ranges
Parameter Range
R 10 µΩ to 100 kΩ
X, IZI 10 µΩ to 100 kΩ (typical)
L 10 nH to 10 H (typical)
θ -180° to +180°
Agilent 4338B Specifications
Table 1. Measurement accuracy (± % of reading)
Measurement accuracy
5
Measurement conditions
and functions
Test frequency: 1 kHz ± 0.1%
AC test signal level (rms current):
1 µ A, 10 µ A, 100 µ A, 1 mA, 10 mA
Maximum applied AC voltage:
20 mV peak
Maximum DC voltage to BNC
terminals: 42 V
Ranging: Auto and hold
Maximum cable length: 2 meters
Trigger: Internal, manual, and
external
Delay time: 0 to 9999 ms in 1-ms
steps
Averaging: 1 to 256
Measurement time (typical):
Short Medium Long
34 ms 70 ms 900 ms
Other instrument functions
Math functions: Deviation (∆) and
percent deviation (%∆).
Short error correction:
Eliminates measurement errors due
to parasitic impedances in cables and
test fixtures.
Comparator: HIGH, IN, and LOW for
primary and secondary parameters.
Continuous memory: All instrument
settings are automatically saved for
up to 72 hours when power is lost or
the instrument is turned off.
Save/recall: 10 instrument states
from non-volatile memory.
Contact check: Detects contact
failure.
GPIB: Implementation of IEEE-488
for control and data.
Handler interface:
Negative logic and optically isolated;
output signals: HIGH/IN/LOW,
end-of-measurement, index, and
alarm;
input signals are keylock and
external trigger.
Physical characteristics
Power: 90-132 Vac or 198-264 Vac.
47-66 Hz. 45 VA typical.
Operating temperature: 0 °C to 45 °C
Dimensions: 320(W) x 100(H) x
300(D) mm
Weight: 4.5 kg
6
16005B Kelvin clip lead (large)
Cable length, 0.4 meter. Jaws mate
with large terminal devices. One lead
supplied only.
16006A pin-type probe lead
Cable length, 0.4 meter. Spring-loaded
probe tips for firm contact. Useful for
manual contact measurements. One
lead supplied only.
16064B LED display/trigger box
Displays comparator status. Cable
length, 1.5 meters. External trigger.
Test Fixtures/Accessories for the Agilent 4338B Milliohm Meter
16005C Kelvin IC clip lead
(red clip)
16005D Kelvin IC clip lead
(black clip)
Cable length, 0.4 meter. Small contacts for devices with fine leads.
One lead supplied only.
16007A alligator clip lead
(red clip)
16007B alligator clip lead
(black clip)
Alligator clip lead. Cable length, 0.4
meter. Each test lead has a separate
alligator clip voltage and current
terminal. One lead supplied only.
16143B mating cable
Interface between test leads and
4338B. Cable length, 0.5 meter.
16338A test lead kit
Contains one each of the following:
16143B, 16005C, 16005D, 16007A,
16007B, carrying case. Contains two
each of the following: 16005B and
16006A.
Black
Red
Black Red
7
Ordering information
Agilent 4338B milliohm meter
Furnished accessories:
Power cable
(Test fixtures are not furnished as
standard.)
Manual options
1
4338B-AB0 Taiwan - Chinese localization
4338B-AB1 Korea - Korean localization
4338B-ABA U.S. - English localization
4338B-ABD Germany - German
localization
4338B-ABF France - French localization
4338B-ABJ Japan - Japanese localization
4338B-0BW Add service manual
Cabinet options
4338B-1CM Rack mount kit
4338B-1CN Front handle kit
(Rack flange handle kit is not
compatible.)
Calibration certificate option
4338B-1A7 ISO 17025 compliant
calibration
1. Manual is not furnished as standard.
Test fixtures and accessories:
16005B Kelvin clip lead (1 lead only)
16005C Kelvin IC clip lead,
red clip (1 lead only)
16005D Kelvin IC clip lead,
black clip (1 lead only)
16006A pin-type probe lead
(1 lead only)
16007A alligator clip lead, red
(1 lead only)
16007B alligator clip lead, black
(1 lead only)
16143B mating cable
(Requires 2 leads)
16338A test lead kit.
Includes 16005B/5C/5D/6A/7A/7B
leads, 16143B mating cable and
carrying case.
16064B LED display/trigger box
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Product specifications and descriptions in this document
subject to change without notice.
© Agilent Technologies, Inc. 1996, 2000, 2003, 2004
Printed in USA, April 2, 2004
5964-6183E
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