Help with HP 3450B Multi-Function Meter needed - diyAudio
Go Back   Home > Forums > Design & Build > Equipment & Tools

Equipment & Tools From test equipment to hand tools

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 20th June 2010, 09:57 PM   #1
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
Default Help with HP 3450B Multi-Function Meter needed

Hi,

I'd like to get a faulty HP 3450B Multi-Function Meter running again. The unit seems to power up, some of the display's nixie tubes light up (and stay lit...) and a few relays go click, but that's it. The buttons don't light up and unit doesn't respond to anything.

I really don't know where to start, does someone have experience with this device and can provide hints? It's too beautiful to toss it out or gut it for parts...

Thanks,

dave
__________________
Gravity - Making the G since 13.7 billion B.C.
  Reply With Quote
Old 20th June 2010, 10:26 PM   #2
tomchr is offline tomchr  United States
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Greater Seattle Area
The service manual is available for download on Agilent's website. If the schematics are too low resolution to read, try contacting Artek Media or Manuals Plus.

~Tom
  Reply With Quote
Old 20th June 2010, 11:12 PM   #3
gootee is offline gootee  United States
diyAudio Member
 
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
After a careful detailed inspection, by eye, of all internals, check the rail voltages, first. If any are out of spec, at all, find out why and fix that before proceeding much further.

That unit is very old so I would consider replacing all of the electrolytic capacitors in the power supply, and then elsewhere if necessary, unless you have an ESR meter and can check them. (Or, if you have a scope and a pulse or square wave generator, you could try using the method at TESTING ESR OF ELECTROLYTIC CAPACITORS, without an ESR meter .)

I would also get some Caig De-Oxit and treat all of the switches, etc, and anything internal or external that can be unplugged, and all connectors (See caig.com for specific recommendations and products for special metals and conductive plastic pots).

Cheers,

Tom Gootee
  Reply With Quote
Old 21st June 2010, 12:04 AM   #4
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
Wow, that was fast. Thanks for the link to the manual, I was looking for one all over, but not thoroughly enough it appears.

I'll check the voltages, maybe they give me an idea of what's wrong.

Thanks!
__________________
Gravity - Making the G since 13.7 billion B.C.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
HP 339a Meter scaling TubeMack Equipment & Tools 3 16th February 2010 03:57 PM
HP 8116A Pulse Function generator Voltaic Everything Else 18 12th April 2009 06:14 PM
Bench Digital Multi Meter TheDriver Parts 20 24th July 2008 12:52 AM
For Sale HP 3311A Function Generator a1095us Swap Meet 1 7th November 2006 09:20 PM
Tektronic 465B Oscilloscope, 52amp PSU, HP Function Generator Ocelaris Swap Meet 1 18th July 2006 06:10 PM


New To Site? Need Help?

All times are GMT. The time now is 05:57 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2