HP Forum Archive 15

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HP 3468A US / German voltage selection Message #1 Posted by gebripe on 20 Dec 2005, 3:44 p.m. Folks, there's a sticker with multiple supply voltages on the back of the 3468A / B Multimeter (see image below - sorry for the bad scan), with one option being "checked". This indicates that the voltage can somehow be selected... Now that these Multimeters are relatively hard to get in Germany, I though about buying one in the US. There's a switch for frequency selection (50Hz/60Hz), but I haven't found anything for the voltage. Usually, one could probably use a power converter, but I don't know in how far the device relies on the supply voltage as a comparator. So question is: Can the device be reconfigured / rewired / resoldered for use with the German supply voltage of 230V instead of the US 110/120V? Thanks in advance for your help. Gunther

Re: HP 3468A US / German voltage selection Message #2 Posted by Daniel Diggelmann on 20 Dec 2005, 4:13 p.m., in response to message #1 by gebripe Hi Gunter, No problems in using a US Model in Germany. After taking off the cover you'll fin a cable on the PCB (printed circuit board) next to the power transformer which can be plugged on the correct voltage selection pin. The voltages to choose from a printed on the PCB. I've bought my HP-3468A in USA and am using it in Switzerland on 230VAC. Cheers Daniel

Re: HP 3468A US / German voltage selection Message #3 Posted by Etienne Victoria on 20 Dec 2005, 4:21 p.m., in response to message #2 by Daniel Diggelmann Hi Daniel, Ooops, sorry I didn't see your post before posting mine!! Apologies & best regards! Etienne

Re: HP 3468A US / German voltage selection Message #4 Posted by gebripe on 20 Dec 2005, 4:24 p.m., in response to message #2 by Daniel Diggelmann Daniel, you've made my day. Now I have another use for your HP-IL module that is hopefully to arrive in the next few days... :-) I'll try and get a 3468 asap. Thanks! Gunther

Re: HP 3468A US / German voltage selection Message #5 Posted by Etienne Victoria on 20 Dec 2005, 4:20 p.m., in response to message #1 by gebripe Hallo Günther, Yes, you can change the voltage selection on the 3468A/B but, contrary to the frequency, the change must be performed internally. You have to open the multimeter. inside, you have to solder a jumper (J701) between 2 connections that will provide you with the desired voltage. The precise scheme to follow is given on page 2.1 figure 2.4 of the 3468A/B service manual. More precisely on this page: After soldering and double-checking your soldering... Test & enjoy! MfG aus Frankreich! Etienne Edited: 20 Dec 2005, 4:22 p.m.

Re: HP 3468A US / German voltage selection Message #6 Posted by gebripe on 20 Dec 2005, 4:28 p.m., in response to message #5 by Etienne Victoria Etienne, wow, thank you for taking the time to provide explanations and scans, that's awesome! Gunther

Re: HP 3468A US / German voltage selection Message #7 Posted by gebripe on 6 Jan 2006, 5:02 a.m., in response to message #5 by Etienne Victoria Just in case anyone else is interested: I just modified a 3468A to 240V by soldering in the correct jumper as described above. You don't even have to lift the PCB, just open the case by the 4 screws on the bottom, solder the existing bridge out and a new one in. Easy thing.

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