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English URL
www.agilent.com/find/products
4338B
Milliohmmeter
LCR & Resistance Meters
• Low and selectable test signal current: 1 µA to 10 mA
• Wide measurement range: 10 µ
Ω
to 100 k
Ω
• 10 µ
Ω
resolution
• Contact check function
• 1 kHz ac measurement
• High-speed measurement: 34 ms
• Built-in comparator
• Auto-measurement mode
4338B
4338B Milliohmmeter
The 4338B milliohmmeter is a precise, reliable, high-speed test tool
for measurements of low resistance.
Precise, Low-Resistance Measurement
Contact failure of electromechanical components in a low-current
circuit is a key issue for component reliability. The 4338B offers selec-
table low ac test signals (1 µ A to 10 mA). Users can now characterize
low resistances of electromechanical components under low-current
conditions. A high resolution of 10 µ
Ω
allows you to determine the
slightest differences in contact resistance testing of relays, switches,
connectors, PC board traces and cables. The 1 kHz test signal elimi-
nates potential errors introduced by thermoelectric effects on the
device-under-test (DUT) contacts. The 1 kHz ac test signal is the best
solution to evaluate the internal resistance of batteries, because it
avoids dc energy consumption.
High-Speed Measurements
The high-speed (34 ms), built-in comparator and GPIB/handler
interfaces make it possible to construct a measurement system
using an automatic handler and external computer to minimize
production test time.
Auto-Measurement Mode
When performing gross continuity testing where the test signal level
is not a significant factor in the test, the auto-measurement function
allows the instrument to select an appropriate test signal and mea-
surement range setting.
Specifications
(Refer to Technical Overview for complete specifications)
Measurement Function
Measurement Parameters:
R (ac resistance), X (reactance),
L (inductance),
Z
(impedance),
(phase [˚])
Combinations:
R, R–X, R–L,
Z
–
(series mode only)
Mathematical Functions:
Deviation and percent deviation
Display Digits:
3, 4, or 5 (selectable)
Test Signal Characteristics
• Test Frequency: 1 kHz
• Frequency Accuracy: ±0.1%
• Test Signal Level: 1 µA, 10 µA, 100 µA, 1 mA, 10 mA rms
• Level Accuracy: ±(10% + 0.2 µA)
• Maximum Voltage Across Sample: 20 mV peak in any case
Measurement Range
Parameter
Measurement Range
R
10 µ
Ω
to 100 k
Ω
X,
Z
10 µ
Ω
to 100 k
Ω
(typical)
L
10 nH to 10 H (typical)
–180˚ to +180˚ (typical)
Measurement Accuracy:
±0.4% Basic for R
Measurement Time:
Time interval from a trigger command to the end of
measurement (EOM) signal output at the handler interface port
Mode
Time (typical)
SHORT
34 ms
MEDIUM
70 ms
LONG
900 ms
Correction Function
Zero SHORT: Eliminates measurement errors due to parasitic impedances
in the test fixture
Comparator Function
HIGH/IN/LOW for each primary measurement parameter and the
secondary measurement parameter
Contact Check Function
Contact failure between the test fixture and device can be detected
Other Functions
• Superimposed dc: ±42 Vdc maximum may be present on
measurement terminals
• Save/Recall: Ten instrument setups can be saved/recalled from
the internal nonvolatile memory
• Continuous Memory Capability: If the instrument is turned off,
or if a power failure occurs, instrument settings are automatically
memorized (
≤
72 hours at 23°C ± 5°C)
• GPIB Interface: All control settings, measured values, and
comparator information
• Handler Interface: All output signals are negative-logic, optically
isolated open collectors
• Output Signals Include: HIGH/IN/LOW, index, end of measure-
ment, and alarm. Input signals are keylock and external trigger
General Specifications
Power Requirements:
90 V to 132 V or 198 V to 264 V, 47 Hz to 66 Hz,
45 VA max.
Operating Temperature:
0°C to 45°C
Size:
100 mm H x 320 mm W x 300 mm D (3.94 in x 12.6 in x 11.81 in)
Weight:
4.5 kg (9.9 lb)
Key Literature
4338B Milliohmmeter Technical Overview, p/n 5964-6183E
Furnished Accessories
Operation manual, power cable (mating cable and test leads, or 16338A
test lead set, must be ordered separately)
Ordering Information
4338B
Milliohmmeter
Furnished Accessories: CD-ROM (manual), power cable (mating cable and
test leads, or
16338A
test lead kit, must be ordered separately)
Options
4338B-ABA
US-English Localization
4338B-ABJ
Japan-Japanese Localization
Accessories
16338A
Test Lead Kit
The 16338A contains the following accessories:
• Kelvin Clip Lead (large, 2 ea)
• Kelvin IC Clip Lead (red, 1 ea)
• Kelvin IC Clip Lead (black, 1 ea)
• Pin-Type Probe Lead (2 ea)
• Alligator Clip Leads (red, 1 ea)
• Alligator Clip Leads (black, 1 ea)
• Mating Cable (1 ea)
Summary of Contents for All
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