HP / Agilent 34401A Digital Multimeter, 6 Digit
HP / Agilent Laboratory Measurement Instruments. Voltage: 100 mV to 1000 V, Voltage: 100 mV to 750 V True RMS, Current: 100 µA to 3 A.
- Model
- HP / Agilent 34401A
- Calibration
- Available on request
- Price
- $562
- Status
- In stock
- RFQ ref
- 34401A
This unit
The HP/Agilent 34401A is a 6½ digit digital multimeter delivering DC voltage accuracy of 0.0015% (24-hour) and AC voltage accuracy of 0.06% (1-year). Built for both benchtop and automated test environments, it combines precision measurement with high-speed data acquisition - up to 1,000 readings per second directly to GPIB.
Technical Specifications Measurement Functions
DC Voltage: 100 mV to 1000 V
AC Voltage: 100 mV to 750 V True RMS, 3 Hz to 300 kHz bandwidth
DC Current: 100 µA to 3 A
AC Current: 100 µA to 3 A True RMS, 3 Hz to 5 kHz bandwidth
Resistance: 100 Ω to 100 MΩ (2-wire and 4-wire selectable)
Frequency: 300 Hz to 1 MHz
Period measurement with AC voltage input ranges
Continuity testing with audible alarm
Diode testing to 1.000 V
dB and dBm measurements Accuracy (selected ranges)
DC Voltage: 0.0015% of reading + 0.0004% of range (10 V range, 24-hour)
AC Voltage: 0.06% of reading + 0.03% of range (750 V range, 1-year)
Resistance (100 Ω range): 0.0030% of reading + 0.0030% of range
DC Current (1 A range): 0.050% of reading + 0.006% of range
AC Current (1 A range): 0.10% of reading + 0.04% of range
Key Features
Resolution: 6½ digits
Reading rate: 1,000 readings/second to GPIB
Internal memory: 512 readings
Min/Max/Average statistical functions
Null feature for offset and lead resistance removal
Reading Hold and Limit Testing with TTL output
Input Resistance: 10 MΩ standard (high impedance option >10 GΩ on selected ranges)
Input Bias Current: <30 pA at 25°C
AC input impedance: 1 MΩ parallel with 100 pF
Normal Mode Rejection: 60 dB; Common Mode Rejection Ratio: 60 dB
Measurement Technology DC voltage uses Continuously Integrating Multi-slope III A-D conversion. AC voltage employs AC-coupled True RMS measurement with up to 400 Vdc bias capability. Resistance employs selectable 4-wire or 2-wire techniques with current source referenced to LO input. Frequency and period employ reciprocal counting.
Compatibility & Integration Standard GPIB and RS-232 interfaces enable integration into automated test systems. The instrument supports SCPI, Agilent 3478A, and Fluke 8840A/42A command languages for legacy and modern test software compatibility.
Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 3 Hz to 300 kHz (up to 1 MHz for AC voltage/current) |
| frequency measurement up to 1 MHz | Voltage / Current Range | DC Voltage: 0-1000 V |
| AC Voltage | 0-750 V |
| DC Current | 0-3 A |
| AC Current | 0-3 A |
| Resistance | 100 Ω to 100 MΩ |
HP / Agilent 34401A — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the HP / Agilent 34401A. Calibration covers DC voltage accuracy at all ranges, AC voltage (True RMS) accuracy at 50 Hz, 1 kHz, and 10 kHz, DC current accuracy, resistance accuracy at all decade ranges, frequency accuracy, and diode test voltage. Fluke 87V and 289 also include capacitance and temperature calibration.. All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common HP / Agilent 34401A faults: blown input fuse, worn input jacks, display segment failure, relay contact wear on bench DMMs. Common faults include worn input jacks (banana socket contact wear on the mA and COM terminals), blown input fuses (especially the 440 mA HRC fuse), and display segment failures. Keithley 2000/2001/2002 bench DMMs commonly develop relay contact wear affecting resistance accuracy after extended service.
HP / Agilent 34401A price
This HP / Agilent 34401A is listed at $561.58. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
HP / Agilent 34401A calibration cost
NIST-traceable calibration for the HP / Agilent 34401A is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers DC voltage accuracy at all ranges, AC voltage (True RMS) accuracy at 50 Hz, 1 kHz, and 10 kHz, DC current accuracy, resistance accuracy at all decade ranges, frequency accuracy, and diode test voltage. Fluke 87V and 289 also include capacitance and temperature calibration.. Turnaround is 1 to 3 business days after receipt. See full calibration details →
