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Superior performance. The Keysight Technologies, Inc. A multimeter gives you .. From Hewlett-Packard through Agilent to Keysight. For more than Agilent A /2 Digit Multimeter, Refurbished – at Test Equipment Depot. Superior Performance. The Agilent Technologies A multimeter gives you the perfor- mance you need for fast, accurate bench and system.

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Total man-hours spent on this project around 8 hoursgive or take few.

Keysight Technologies (Agilent HP) A used or new for sale at used-line

Up for sale is a used, complete, sold as pictured, no errors, passed self test but will need a new display as there are extra lines and or digits in the display and unit will be sold in working order NO Options are marked. HP A power supplies. Time worklog summary Image HP A Zero hewlwtt with 4W short.

U multiplexer 74HC was replaced as well, but issue was packarv. Good condition, “X” shaped scratch on the right side of the screen, small nick in rubber around the screen. That is likely due to absence of fan or vent holes anywhere in the chassis. First step — zero calibration with 4W short.

Agilent 34401A

Final test with 10VDC: HP A after cover removed. All buttons, knobs, and switches are good and intact. Removed remnants, padkard and repaired PCB using copper foil and installed fresh capacitor of same size and spec.


All the magic and active parts are located on single mainboard. This part is used and was removed in working condition. Removed front panel, to get easier access to mainboard. Also shop in Also shop in.

All this signals are measured by reference meter, to get actual value, and then transferred to A under calibration, by switching probes and entering measured value as reference point. Top Dog Test is corporate friendly we understand the traditional acquisition and capital approval process. This is one of best connections, and look really clean.

If you would like to support us by making a donation please click the Paypal hewltt HP A front and rear.

Showing Results for Keysight Technologies (Agilent HP) 34401A

Banana input terminal jacks are custom-made parts, with big solid copper tube sockets bent and soldered directly to motherboard. Keysight A Digital Multimeter — Datasheet.

And yes, some were dead short, and some were missing, likely due previous owner repair attempts. Now all voltages are fine, but meter still not working, with exactly same test results, wrong DCV readings and failure on any other function. Some of hobbyists were even upgrading reference to LTZ circuit for better A stability. Especially considering, that I never had A before.

Hope we can see more stuff later this year! Redistribution and use of this article or any images or files referenced in it, in source and binary forms, with or without modification, are permitted provided that the following conditions are met:.


The unit passed self-testing pic 2. HP A local 15V zener regulator. Shift registers on AC circuitry and few other opamps were replaced as well, but that was actually unnecessary. How soon will you receive y HP A more zener regulators and capacitors. In no event shall the author, xDevs. Security seal must remain intact as illustrated in the last picture.

July 19,6: HP Hewpett Firmware revision 1. These are often a problem on old instruments, if contacts got contamination and unable to maintain low resistance connections. We tested this item and it appears to be functioning properly, though we did not run it through a Includes all Standard Accessories.

HP A Replaced components locations. DMM is very dirty outside, and definitely need good deal of scrubbing with alcohol and cleaning. This means all electrolytic capacitors must be replaced, no questions asked.

I had some left from other repairs, so you can see already new caps on photo above. In this article initial diagnostics, repair attempt and calibration will 34401s covered. Agilent A Digital Multimeter, 6. Now thinking about possible cause and overvoltage on this rail, I checked 3. Layout is tidy and nicely done for this instrument, thumbs up to HP engineers.