The Yokogawa 73401 is a portable digital multimeter engineered for precision electrical measurements in laboratory, field, and industrial environments. It delivers 0.04% DC voltage accuracy across a 1.0 kV maximum range and combines a 4.5-digit display with 50,000-count resolution and dual 51-segment bar graph for intuitive readings. The instrument performs DC/AC voltage and current, resistance, capacitance, frequency, continuity, diode test, and temperature measurements with fast Σ-modulation A/D conversion and response times under 1 second. Superior AC measurement capability extends from 10 Hz with RMS detection and crest factor <3. Integrated functions include min/max recording, relative mode, auto-ranging, auto hold, minimum/maximum/average display, decibel calculation, peak hold, and dual simultaneous display modes—such as frequency with voltage or frequency with duty ratio. Data management features 50-point manual memory and 600-point logging memory for field data capture. The rusted elastomer casing provides shock protection for mobile use, while terminal shutters prevent accidental lead misconnection during current measurements. NMRR reaches 80 dB or greater at 50/60 Hz ± 0.1%. User calibration capability allows on-site accuracy adjustment. Optional communication packages enable PC data transfer and export to spreadsheet applications.
– Technical Specifications
• Display: 4.5-digit, 50,000 count, 51-segment bar graph
• DC Voltage: 1.0 kV maximum; 0.04% rdg + 2 dgt accuracy
• AC Voltage/Current: RMS detection, crest factor <3
• Frequency Range: 10 Hz and above
• Data Memory: 50 points (manual mode); 600 points (logging mode)
• Response Time: ≤1 second
• NMRR: 80 dB or greater (50/60 Hz ± 0.1%)
• A/D Conversion: Σ modulation
– Key Features
• Min/max recording and peak hold capture transient events
• Relative mode and percentage computation for baseline comparison
• Dual-display simultaneous readout of frequency + voltage, frequency + duty ratio, or decibels + voltage
• Auto-ranging with manual override
• User calibration function for field verification
• Durable elastomer shock casing for portable operation
• Terminal shutters prevent incorrect current lead insertion
– Measurement Functions
• DC/AC voltage and current
• Resistance, capacitance, frequency
• Continuity and diode test
• Temperature
• Decibel and relative value calculation
– Typical Applications
Electrical troubleshooting, preventive maintenance, HVAC service, power distribution inspection, and equipment commissioning in field and industrial settings.
– Compatibility & Integration
Optional communication packages support PC connectivity for data transfer and Excel export.
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