4300E Programmable Micro-Ohmmeter
$6,672.00
The 4300E Digital Micro-Ohmmeter is designed for demanding ultra-low resistance measurements on motors, transformers, fuses, connectors, circuit breakers, bus bars, bonding and weld joints, and many other applications. Using true 4-wire Kelvin measurement, the 4300E provides accurate resistance measurements across 18 range combinations spanning 2.0000 mΩ through 20.000 kΩ.
Six user-selectable test current ranges from 0.1 mA to 10 A can be combined with three selectable voltage measurement ranges of 20 mV, 200 mV, and 2 V, providing the flexibility required for a wide variety of resistive devices and test conditions.
Building on the proven measurement platform of the 4300C, the 4300E adds a modern high-contrast OLED interface, stored power-up settings, Timed Test Current operation, enhanced Peak and Hi-Lo Comparator functions, improved data logging and communications, and expanded remote-control capabilities.
- Test Current up to 10 Amps
- 18 Voltage/Current Range Combinations
- High Compliance Voltage
- 4-Wire Kelvin Measurement
- Measurement Ranges from 2 mΩ to 20 kΩ
- 3 Selectable Voltage Ranges
- 6 Selectable Test Current Ranges
- High-Contrast OLED Display
- Stored Power-Up Settings
- Timed Test Current Function — up to 1800 Seconds
- Temperature Compensation Mode (TCM)
- Peak High and Peak Low Measurement
- Hi-Lo Resistance Limit Comparator
- Manual On/Off Control of Test Current
- SEND and Data Logging Functions
- RS-232 and USB Standard
- Optional Ethernet Interface
- Optional CET External Current-Enable Interlock
| Range | Test Voltage | Full Scale | Resolution | Test Current1 | Accuracy2 (± % reading ± Ω) |
Temperature Coefficient3 | TCM Mode Accuracy4 (± % reading ± % ΔT) |
|---|---|---|---|---|---|---|---|
| 2mΩ | 20mV | 2.0000mΩ | 100nΩ | 10A | ± .06 ± .0006m | ±50ppm/°C | ± .11 ± .0006m |
| 20mΩ | 20mV | 20.000mΩ | 1µΩ | 1A | ± .04 ± .006m | ±50ppm/°C | ± .09 ± .006m |
| 200mΩ | 20mV | 200.00mΩ | 10µΩ | 0.1A | ± .04 ± .06m | ±50ppm/°C | ± .09 ± .06m |
| 2Ω | 20mV | 2.0000Ω | 100µΩ | 10mA | ± .04 ± .0006 | ±50ppm/°C | ± .09 ± .0006 |
| 20Ω | 20mV | 20.000Ω | 1mΩ | 1mA | ± .04 ± .006 | ±50ppm/°C | ± .09 ± .006 |
| 200Ω | 20mV | 200.00Ω | 10mΩ | 0.1mA | ± .04 ± .06 | ±50ppm/°C | ± .09 ± .06 |
| 20mΩ | 200mV | 20.000mΩ | 1µΩ | 10A | ± .06 ± .003m | ±50ppm/°C | ± .11 ± .003m |
| 200mΩ | 200mV | 200.00mΩ | 10µΩ | 1A | ± .04 ± .03m | ±50ppm/°C | ± .09 ± .03m |
| 2Ω | 200mV | 2.0000Ω | 100µΩ | 0.1A | ± .04 ± .0003 | ±50ppm/°C | ± .09 ± .0003 |
| 20Ω | 200mV | 20.000Ω | 1mΩ | 10mA | ± .04 ± .003 | ±50ppm/°C | ± .09 ± .003 |
| 200Ω | 200mV | 200.00Ω | 10mΩ | 1mA | ± .04 ± .03 | ±50ppm/°C | ± .09 ± .03 |
| 2kΩ | 200mV | 2.0000kΩ | 100mΩ | 0.1mA | ± .04 ± .0003k | ±50ppm/°C | ± .09 ± .0003k |
| 200mΩ | 2V | 200.00mΩ | 10µΩ | 10A | ± .06 ± .03m | ±50ppm/°C | ± .11 ± .03m |
| 2Ω | 2V | 2.0000Ω | 100µΩ | 1A | ± .04 ± .0003 | ±50ppm/°C | ± .09 ± .0003 |
| 20Ω | 2V | 20.000Ω | 1mΩ | 0.1A | ± .04 ± .003 | ±50ppm/°C | ± .09 ± .003 |
| 200Ω | 2V | 200.00Ω | 10mΩ | 10mA | ± .04 ± .03 | ±50ppm/°C | ± .09 ± .03 |
| 2kΩ | 2V | 2.0000kΩ | 100mΩ | 1mA | ± .04 ± .0003k | ±50ppm/°C | ± .09 ± .0003k |
| 20kΩ | 2V | 20.000kΩ | 1Ω | 0.1mA | ± .04 ± .003k | ±50ppm/°C | ± .09 ± .003k |
| General specifications | |
| Display type: | High-contrast OLED with automatic dimming |
| Overload indication: | O.L. |
| Conversion rate: | 100ms |
| Terminal configuration: | 4-wire kelvin |
| Max kick-back protection: | 500A peak induced current |
| Compl. Voltage (normal mode): | 7.5 VDC nominal @ 10A resistive |
| Compl. Voltage (charging inductor mode): | 20 VDC when indicator is on |
| Test current polarity: | Positive (flows high to low) |
| Open circuit voltage (test current off): | < 20mV |
| Power | |
| Power requirements: | 115vac or 230vac ±10% |
| Temperature | |
| Operating temp. Range: | 0°c to 50°c |
| Storage temp. Range: | -40°c to 85°c |
| Humidity: | 80% rh max @ 40°c (non-condensing) |
| Physical specifications | |
| Width|depth|height: | 17” / 43cm | 14.5” / 36.8cm | 4” /10cm |
| Weight: | 20lbs / 9 kg net; |
Data Sheet & Manual
4300e Manual rev 72_1
4300E-Datasheet
4300E_InfoSheet
4300E_vs_4300C_Comparison
Maximize Your Instrument’s Performance with Certified-Compatible Cables, Leads, Connectors, & More
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K 4-Wire Kelvin Lead Set
$325.00 -
KCS Gold-Plated Kelvin Clips (2 Per Set)
$189.00 -
KK 4-Wire Kelvin Lead Set
$445.00 -
Jaws Heavy Duty Kelvin Clip Set
$189.00 -
K-Gray Shielded 4-Wire Kelvin Lead Set
$385.00 -
KL Heavy Duty 6-ft Kelvin Lead Set (Spade Lug to Jaws)
$445.00 -
MPS Single Pointed Probe Set
$445.00 -
MP1 4-wire Kelvin Micro-Probes (0.05” Spacing)
$445.00 -
MP2 4-wire Kelvin Mini-Probes (0.18” Spacing)
$445.00 -
MP4 4-wire surface probe (1” dia.)
$445.00 -
MP5 4-wire surface probe (0.5” dia.)
$445.00 -
Omni Temperature Compensator
$445.00 -
CK Compensator Extension Cable
$119.00 -
Dual Banana to Dual Banana Lead Set
$325.00 -
KLB
$417.00 -
K-174
$305.00 -
GP-1 1 Meter IEEE-488/GPIB Cable
$263.00 -
GP-2 2 Meter IEEE-488/GPIB Cable
$263.00 -
RX-3 Rack Adapter
$376.00 -
KC Cable Set for Bendix Connectors
$405.00
Key Features
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Precision Low-Resistance Measurement
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0.04% basic accuracy on most ranges
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18 measurement configurations covering ranges from 2 mΩ to 20 kΩ
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Resolution as low as 100 nΩ
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Six selectable test currents from 0.1 mA to 10 A
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Three selectable voltage ranges: 20 mV, 200 mV, and 2 V
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Four-wire Kelvin connections for maximum measurement precision
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Timed Test Current
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Programmable test-current duration from 0 to 1800 seconds
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Automatically turns test current OFF at the end of the programmed interval
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Captures the final resistance measurement at completion
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Trigger from the front panel or through the remote interface for repeatable automated testing
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Inductive Load Capability & Safety
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High compliance voltage for rapid charging of motors, transformers, coils, and other inductive loads
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Automatic Charging Inductor Mode provides greater than 20 VDC compliance when required
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SAFE / UNSAFE indicators show when test leads can safely be disconnected
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500 A peak induced-current kickback protection
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Modern Connectivity
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Standard RS-232 and USB interfaces
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Optional Ethernet for networked test systems
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Improved, stable communications with an expanded command and query set
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Common command structure across supported interfaces
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Flexible Comparator Functions
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Traditional Min/Max Hi-Lo comparison
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Nominal ±% deviation mode for simplified tolerance testing
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Optional rear-panel relay outputs for automated sorting, alarms, counters, and process control
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Advanced Display & Usability
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Bright, high-contrast OLED display
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Automatic display dimming helps extend OLED life
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Stored power-up configuration eliminates repetitive setup
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VIEW function provides quick access to active instrument settings
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Enhanced Measurement Functions
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Peak Hi/Peak Lo mode displays Peak Hi, Peak Lo, and the live resistance measurement simultaneously
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Dedicated SEND function for transmitting individual measurements
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Continuous LOG function with selectable transmission intervals from 50 ms to 1 second
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Manual or automatic range selection
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Temperature Compensation
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Omni-TC temperature sensor system for automatic temperature-compensated resistance measurements
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Programmable temperature coefficient and reference temperature
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Preset configurations for copper, aluminum, and gold
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Custom temperature compensation values for other conductive materials
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External Current Control
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Optional Current Enable Terminal (CET) provides an external test-current interlock
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Compatible with external switches, safety interlocks, and foot controls
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Immediaqtely disables test current if the external enable circuit is opened
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Automatic Temperature Compensation
Reduce Errors, Improve Productivity, Expand Possibilities
Resistance changes with temperature. For materials such as copper and aluminum, even modest changes in ambient temperature can produce measurable differences in resistance, making direct comparison between measurements difficult.
The Model 4300E Temperature Compensation Mode (TCM) automatically converts the measured resistance to its equivalent value at a selected reference temperature using the optional Omni-TC temperature sensor.
The 4300E can be programmed with both the material’s temperature coefficient and the desired reference temperature. Built-in configurations provide convenient presets for:
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Copper at 20 °C or 25 °C
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Aluminum at 20 °C or 25 °C
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Gold at 20 °C or 25 °C
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Custom coefficient and reference-temperature values for other materials
During operation, the 4300E measures both the load resistance and ambient temperature, then automatically calculates and displays the temperature-compensated resistance.
On-screen, the 4300E displays:
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The temperature-compensated resistance value
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The measured ambient temperature
The uncompensated resistance value remains available through the instrument’s remote interfaces, providing additional flexibility for data logging, analysis, and automated systems.
Hi-Lo Comparator (HLC)
Reduce Human Error and Streamline Testing
The Hi-Lo Comparator (HLC) mode on the Model 4300E simplifies repetitive production and quality-control testing by automatically comparing each resistance measurement against predefined acceptance limits.
The operator receives immediate feedback from dedicated front-panel indicators:
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GO — The measured resistance is within the programmed limits.
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LO — The resistance is below the lower limit.
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HI — The resistance is above the upper limit.
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Audible indication provides additional operator feedback when applicable.
The 4300E provides two convenient methods for defining acceptance criteria:
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Min/Max Mode — Directly enter the lower and upper resistance limits.
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Nominal ±% Mode — Enter a nominal resistance and the allowable percentage deviation.
For automated applications, an optional rear-panel HLC Relay Terminal provides independent contact closures corresponding to GO, LO, and HI conditions. These outputs can be used for automated batch sorting, counters, alarms, process control, or other external equipment.
Stored Power-Up Settings
Start with your preferred configuration Every Time
The Model 4300E allows the operator to save the preferred instrument configuration so that dedicated test stations can power up ready to work. Instead of manually reconfiguring the meter each time it is switched on, stored settings are automatically restored at startup.
Using the front-panel Store function, the 4300E can retain:
Measurement Range
Timed Test Current — ON or OFF
Temperature Compensation Mode (TCM) — ON or OFF
Hi-Lo Comparator (HLC) — ON or OFF
Peak Hi/Peak Lo Mode — ON or OFF
To change the startup configuration, simply configure the instrument as desired and store the new setup. Factory power-up defaults can also be restored at any time.
Stored power-up settings are particularly useful in production environments, dedicated workstations, and repetitive test applications where consistent instrument configuration helps reduce operator setup time and prevents configuration errors.
Current Enable Terminal (CET)
Extra Control of Test Current
For applications requiring external control or an additional test-current interlock, the Model 4300E is available with the optional Current Enable Terminal (CET).
The CET uses a rear-panel ¼-inch jack to control whether the 4300E is permitted to source test current:
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CET closed — Test current operation is enabled.
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CET open — Test current is disabled.
If the CET circuit is open, the 4300E will not allow the test current to turn ON. If the circuit opens while test current is already active, the instrument immediately disables the current output.
The CET can be connected to external safety switches, fixtures, interlocks, or foot controls, making it especially useful in production environments and applications where the test current must be controlled by equipment external to the instrument.
The CET option includes both a user-wirable plug for external control and a bypass plug for normal operation when an external interlock is not required.
Connectivity & Interfaces
Reliable Communication for Modern Automated Test Systems
The Model 4300E combines the proven measurement capabilities of the 4300 Series with a significantly improved communications platform designed for modern automated test environments.
Standard and optional interfaces include:
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RS-232 (Standard) — Maintains compatibility with existing automated test systems and legacy installations.
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USB (Standard) — Provides a convenient modern serial connection for PC-based control and data acquisition.
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Ethernet (Optional) — Enables TCP/IP communication for networked test stations, remote monitoring, data logging, and system integration.
The 4300E uses a consistent command structure across its communication interfaces and introduces an expanded command and query set for direct control of instrument functions and status. Remote capabilities include measurement configuration, test-current control, Timed Test Current operation, temperature compensation, comparator settings, stored setup, display control, and safety/status queries.
Dedicated SEND and LOG functions further simplify data collection. Individual readings can be transmitted on demand, or measurements can be continuously logged at selectable intervals from 50 milliseconds to 1 second.
These improvements make the 4300E easier to integrate into existing systems while providing the functionality needed for new automated and network-connected test platforms.
