Simpson 444-2 – Low Voltage Bench MilliOhmmeter

Description

Simpson’s high precision Model 444-2 has been redesigned for added ESD immunity and longer battery life. The model 444-2 Micro-Ohmmeter measures resistance from 50 micro-ohms to 20 ohms. It measures using an extremely small test voltage (100 microvolts maximum) and a four-wire measurement technique. The resistance reading is indicated on a 4-1/2 digit LCD display using one of two measuring modes: An automatic AC measurement mode or a manual DC measurement mode. By limiting the test voltage of the Model 444-2 to only 100 microvolts the instrument will not “punch through” contamination or corrosion. An audible tone can be used to indicate resistance values below any selected reading. The Model 444-2 has a universal power input range of 85Vac to 250Vac and incorporates a self-contained rechargeable Ni-Cad battery for field use.

• 20mΩ – 20Ω in 4 ranges
• 1 μΩ max resolution (20mΩ range @ 5mA)
• 20,000 Count 4 1/2 -Digit LCD
• 2 Measurement Methods: AC Pulse and DC Polarity Switching
• “Punch-Through” Prevention by 100 m V Max. Test Voltage
• User-Adjustable, Low-Resistance Alarm
• AC Test Mode Cancels Offset Voltages and Thermocouple Effects
• Includes Ni-Cad Battery for Field Use and Test Leads

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