description Hewlett Packard 34401A Digital Multimeter Overview
The Hewlett Packard 34401A is a high-precision digital multimeter designed for accurate electrical measurements. It supports voltage, current, and resistance testing with a resolution of up to 16 digits. The device includes a built-in data logger and USB interface for seamless data transfer. Its advanced features make it ideal for laboratory and industrial applications requiring precise measurements.
info Hewlett Packard 34401A Digital Multimeter Specifications
| Weight | 3.2 kg (7.1 lbs) |
| Interface | GPIB (IEEE-488) and USB |
| Dimensions | 373 x 128 x 158 mm |
| Display Type | LCD, 12 digits + sign |
| Reading Rate | up to 1,000 readings/second (remote) |
| Ac Voltage Ranges | 100 mV to 750 V |
| Dc Voltage Ranges | 100 mV to 1000 V |
| Power Consumption | 30 W maximum |
| Display Resolution | 6.5 digits |
| Measurement Functions | DC/AC voltage, DC/AC current, 2-wire/4-wire resistance, frequency, period |
| Basic Dc Voltage Accuracy | 0.0015% + 3 counts |
balance Hewlett Packard 34401A Digital Multimeter Pros & Cons
- 6.5-digit resolution provides laboratory-grade measurement precision for demanding applications
- Comprehensive measurement functions including DC/AC voltage, current, resistance, frequency, and period
- Built-in data logger enables autonomous monitoring without external equipment
- Dual interface options (GPIB and USB) ensure compatibility with legacy and modern systems
- Exceptional long-term stability with 0.002% 24-hour DC voltage accuracy
- High contrast display provides clear readings in various lighting conditions
- Benchtop-only design lacks portability for field service applications
- Average-responding AC measurements cannot accurately measure non-sinewave waveforms
- Legacy instrument (1992) missing modern wireless connectivity like WiFi or Bluetooth
- Higher power consumption (~30W) compared to portable alternatives
- Discontinued by Keysight, limiting new unit availability and official support
help Hewlett Packard 34401A Digital Multimeter FAQ
What is the measurement accuracy of the HP 34401A?
The 34401A offers 6.5-digit resolution with basic DC voltage accuracy of 0.0015% + 3 counts. This specification places it firmly in the precision benchtop multimeter category suitable for calibration and research applications.
Does the HP 34401A support GPIB and USB connectivity?
Yes, the 34401A includes both GPIB (IEEE-488) and USB interfaces as standard. This dual connectivity allows integration with both legacy laboratory systems and modern PC-based test automation setups.
Can the HP 34401A measure true RMS AC signals?
No, the 34401A uses an average-responding, RMS-indicating method for AC measurements. For true RMS capability, users would need to consider Keysight's newer 3446xA series alternatives.
Is the HP 34401A still available new from Keysight?
The 34401A has been discontinued and replaced by the Keysight 34461A and 34465A series. Remaining stock may be available through authorized distributors, but new production units are no longer manufactured.
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What is Hewlett Packard 34401A Digital Multimeter best for?
Engineers, technicians, and researchers requiring high-precision benchtop measurements in laboratory, calibration, or automated test system environments.
How does Hewlett Packard 34401A Digital Multimeter compare to Keysight 34470A High-Precision Digital Multimeter?
Is Hewlett Packard 34401A Digital Multimeter worth it in 2026?
What are the key specifications of Hewlett Packard 34401A Digital Multimeter?
- Weight: 3.2 kg (7.1 lbs)
- Interface: GPIB (IEEE-488) and USB
- Dimensions: 373 x 128 x 158 mm
- Display Type: LCD, 12 digits + sign
- Reading Rate: up to 1,000 readings/second (remote)
- AC Voltage Ranges: 100 mV to 750 V
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