IET labs LOM-510A Specification Sheet

IET labs LOM-510A Specification Sheet
High Accuracy
Micro-Ohmmeter
LOM-510A
Page 1 of 2
Features and accessories to assure
that very low resistance measurements are accomplished accurately,
easily, and economically.
Switched dc Mode:
Allows measurement of switch contacts,
welds, shunts, PC board tracks and other
primarily resistive elements. Thermal emf
effects are eliminated.
Constant dc Mode:
Suitable for measuring the resistance of
inductive components such as coils or
transformers.
Features:
• 1 µΩ resolution
• 0.02% basic accuracy
• Digital output
• Four measurement modes
• Auto-zero switched dc mode
• Probes for chips and traces
Pulsed Mode:
Provides low drive current to allow
measurements of fuses, thermistors, and
other thermally sensitive devices.
The LOM-510A has 4½ digits, 0.02% basic
accuracy and 1 µΩ resolution. Its 4-terminal
measurement technique eliminates lead
resistance errors and 80 dB of ac noise rejection
provides rock-steady readings even in noisy
locations. The unit comes with rugged 4-terminal
test clips and a large selection of optional probes,
clips and fixtures allowing attachment to any lowresistance unknown.
Dry Circuit:
Assures that oxides and film contacts are
not punctured. The Dry Circuit Mode limits
the open circuit voltage to 50 mV. The
Model LOM-510A/20 limits the open circuit
voltage to 20 mV.
Model LOM-510A Micro-ohmmeter shown with
LOM-501C Standard 4-Terminal Kelvin clips
SPECIFICATIONS
Max Dissipation
Range
Drive
(Full Scale)
DC
SW
1A
20 mW 5.0 mW
19.999 mΩ
.1 A
2.0 mW .50 mW
199.99 mΩ
10 mA .2 mW .05 mW
1.9999 Ω
1 mA .02 mW
5 µW
19.999 Ω
.1 mA .002 mW 0.5 µW
199.99 Ω
Resolution
1 µΩ
10 µΩ
100 µΩ
1 mΩ
10 mΩ
Accuracy:
SW (switched dc): 0.02% + 2 counts +2 µΩ
dc (continuous dc): 0.04% + 2 counts + 2 µΩ
Pulsed mode: 0.02% + 4 counts + 2 µΩ
Zero Adjust:
Active only in DC (Continuous dc) mode.
Noise Rejection:
80 dB for SW (Switched dc) and Pulsed Mode
60 dB for DC (Continuous dc) mode.
SW (Switched dc) Mode:
Current switched on for 166 ms, then off for
500 ms (25% duty cycle).
Pulsed Mode:
One cycle of SW (Switched dc) mode;
enabled by shorting two contacts on rear
panel connector.
Display:
4½ digit, 0.5 inch, red LED display.
Display Overrange Indication:
Flashes for DC (Continuous dc) and SW
(Switched dc)
blanks in Pulsed mode
Measurement Rate:
1.5 readings/second
Connections to Unknown:
4-terminal Kelvin leads with shield
LOM-530 (CALIBRATION KIT FOR LOM-510A)
0.01 Ω
0.1 Ω
1Ω
15 Ω
150 Ω
Stability
Max
Power
TempCo
Power
Coefficient
50 ppm/year
2W
20 ppm/°C
0.1 ppm/mW
50 ppm/year
1W
20 ppm/°C
0.1 ppm/mW
20 ppm/year
0.25 W
10 ppm/°C
0.5 ppm/mW
10 ppm/year
0.1 W
3 ppm/°C
0.5 ppm/mW
10 ppm/year
0.1 W
1 ppm/°C
0.5 ppm/mW
Temperature Range: 15° to 30°C
Storage Range: 0°C to 40°C
IET LABS, INC. in the GenRad Tradition
534 Main Street, Westbury, NY 11590
Outputs:
5 BCD digits for value and polarity; Pulsed
Mode Control lines; power supply lines; 25
pin "D" connector.
Warm up time:
1 minute to rated accuracy
Accuracy vs. Temperature:
Stated accuracy applies over an ambient
temperature range of 18 to 27 °C. Error
doubles over the range of 10 to 40 °C.
Accessories Supplied:
LOM-501 test clips
Power Requirements:
105-125 V or 210-250 V
internally settable 50-60 Hz
30 W max
Mechanical:
Dimensions: 22.9 cm W x 5.1 cm H x 27.9 cm D
(9" x 2" x 11")
Weight: 2.7 kg (6 lb)
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Ne
A convenient single unit containing a complete set of (5)
working standard grade resistors for complete calibration of
the micro-ohmmeter.
www.ietlabs.com
TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988
LOM Catalog Pages/01-02-2013
High Accuracy
Micro-Ohmmeter
LOM-510A
Page 2 of 2
ACCESSORIES
4-Terminal General Purpose Kelvin Clips
Cable Assembly: LOM-501C
4-Terminal Kelvin Microprobes
Cable Assembly: LOM-506
4-Terminal Heavy Duty Kelvin Clips
Cable Assembly: LOM-504
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Ne
Suitable for connection in most applications
Suitable for:
-- chips
• Fine-point, springVersions
• Jaw-Opening - 3/8"
-- circuit board components loaded tips (1.27 mm)
LOM-501C - 1m (39")
• Miniature Tips
-- conductor traces
LOM-501C-2m - 2m (79")
• Rugged
-- inside of connectors
LOM-502C - clips only
LOM-501 U - unterminated cable
Wide Opening Kelvin Clips Cable
Assembly: LOM-501W
Suitable for:
-- large bushings
• Jaw opening - 1.75"
-- welded and bolted joints • Lead Length - 3.7 m (12')
-- rails and pipes
-- transformers and motors
-- fuses
-- power distribution buses
Test Fixture for Discrete Components:
LOM-501TF
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Ne
Suitable for
•Connecting to dual binding posts (0.75" apart)
from the side or from the top
•Connecting to individual binding posts
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Ne
Suitable for:
• Radial or axial leads
• Selection and binning
• Reeled components
LOM-501-XL
Cable Options: Extra-Long cables for remote testing -- up to 50 m
For applications where the device under test may be in an outdoors or distant
location, and the LOM-510 must be kept in an indoors environment
ORDERING INFORMATION
LOM-510A-110 LOM-510A-220 LOM-530
LOM-501C
LOM-501C-2m Digital Micro-ohmmeter
LOM-501C test clips
110 Vac operation
Digital Micro-ohmmeter
LOM-501C test clips
220 Vac operation
Calibration Kit for LOM 510-A
Kelvin Test Clips Cable Assembly (pair, length 1 meter)
Kelvin Test Clips Cable Assembly (pair, length 2 meters)
LOM-501W
LOM-502C
LOM-503
LOM-504 LOM-506 LOM-506-1 LOM-501TF
LOM-501-XL
IET LABS, INC. in the GenRad Tradition
534 Main Street, Westbury, NY 11590
Kelvin Test Clips Cable Assembly (wide)
Kelvin Test Clips, without connector (pair)
Kelvin Test Clips Cable Assembly, E-Z Hooks (length 1 meter)
Kelvin Test Clips Cable Assembly, Heavy Duty,
2 inch jaws pair, (length 1 meter)
Kelvin Microprobes Cable Assembly
(pair, length 1 meter)
Replacement Microprobes, set of 4
Test Fixture
Extra-Long cable for remote testing (up to 50 m)
www.ietlabs.com
TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988
LOM Catalog Pages/01-02-2013
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