JAPAN TREASURE BOX
Description

HP / Agilent / Keysight 34401A 6 1/2 Digit Digital Multimeter

Up for sale is another beautifully refurbished unit of the industry-standard, best-selling 6.5-digit high-precision digital multimeter. This unit has been meticulously serviced, refreshed, and upgraded with custom features unlocked, making it a truly premium unit ready for immediate professional or lab use.

[Maintenance & Upgrades Performed]

  • Firmware: Upgraded to the final official firmware ROM Rev 11-05-02.
  • Display: Brand new VFD display installed (bright and crystal clear, no fading).
  • Capacitors: All electrolytic capacitors have been replaced for long-term reliability.
  • Cosmetics: Brand new genuine-style front/rear rubber bumpers and carrying handle installed.
  • Interfaces: GP-IB and RS232C communication fully tested and working perfectly.

[Unlocked Hidden Features / Custom Mod]
The hidden features on this unit have been fully unlocked and enabled:

  • MATH MENU -> MIN-MAX: Standard Deviation and Peak-to-Peak functions added.
  • MATH MENU / TEMPERATURE MODE: SCPI commands added.
  • MATH MENU -> SCALE: SCALE GAIN, SCALE OFFSET, calc:scale, and SCPI commands added.
  • RESOLUTION MENU: Custom aperture setting added.
  • SYSTEM MENU: STORE STATE, RCL STATE, and POWER ON added.
  • MEASUREMENT: 10mA AC current measurement range added.

[Testing & Verification]
The unit passes ALL self-tests (ALL PASS). Following a 1-hour aging period, comparison measurements were conducted using a manufacturer-calibrated Keithley DMM6500 (Calibrated on Nov 14, 2025). The measurement results are excellent, highly stable, and accurate.

  • Brand: Hewlett-Packard / Agilent / Keysight
  • Model: 34401A
  • Product Type: 6.5 Digit Digital Multimeter
  • Included Items: Main Unit, Brand New Factory-Sealed Aftermarket Test Leads, Brand New ainex Ultra-Thin Power Cable (Factory-Sealed).

⚠️ IMPORTANT NOTICE FOR BUYERS:

The unit is in good overall cosmetic condition without any major damage, though minor scratches from normal age and use may be present. Please check the listing photos carefully. Any other reference standards, test fixtures, or visualization overlay labels shown in the photos are for demonstration purposes only and are NOT included in this auction.

Shipping
  • Free Shipping Worldwide!
  • We always send the item with a tracking number. So please place an order without any concern on delivery. You can always track the delivery status.
  • Shipping is only available to the address registered in eBay. If you want us to send to another address, please change your address on eBay and then place an order.
  • Shipping is available from Monday to Friday. Weekends are not available because freight (shipping) companies are closed.
  • We do not mark merchandise values below value or mark items as “gifts” – Japan, US and International government regulations prohibit such behavior.
About Importer's Obligation
  • For US Buyers: Import duties are included in the product price and shipping costs. Therefore, you do not need to pay additional customs duties. Please purchase with confidence.
  • For EU Buyers: In accordance with the latest customs regulations, the flat 3-Euro low-value customs duty will be fully prepaid and covered by us (the seller). You do not need to pay this additional charge upon delivery.
  • For Other International Buyers: Any other local import duties and taxes (if applicable) are not included in the product price and remain the buyer's responsibility. Prices are negotiable to help offset costs, so feel free to contact us via offer or message.
  • Remote Area Surcharge: If the delivery destination is remote as defined by FedEx or DHL, an additional charge of $15-$25 may be required.

Thank you for your understanding.