Roy, Thanks for the info.
Looking at the Hypertronics catalog, it would appear that the panel mounted socket (with male, solder cup, pins) is: P/N D01EEB306MSUTH And the mating plug would be: P/N D01PB306FSUTAH However, the dimensions are a bit off and the appearance of the panel mounted socket is not the same as what is on my 732A, J10, on the back of the 732A-7005 battery module. My connector is exactly as shown in the change sheets with a dimension of 0.475 inches side to side and 0.500 inches top to bottom (as viewed from the back of the unit) rather than 0.512 x 0.512 as suggested in the catalog. However, the diameter of the mounting hole and the presence of a 'notch' appears to be as shown in the catalog, thus suggesting that it, indeed, is a series D01 part. The diameter of the threaded part of J10 is 0.410 inches and the catalog calls for a hole diameter of 0.441 inches. One other observation is the presence of a 'symbol' on the bottom edge of the socket (as viewed from below) that looks like a stylized 'FRE', The 'F' perhaps could be an 'A' and the 'E' perhaps could be a 'B'. The symbol starts low and ends low with a 'peak' of the symbol in the middle of the 'R', sort of a 'roof' shape to the top of the symbol and flat on the bottom of the symbol. Not sure what that means but I have a picture of it if anyone thinks it would help. It does not look like the stylized 'H' symbol shown in the Hpertronic catalog. Perhaps the company was something else before they became Hypertronics. I looked through the change sheets for the 732A and could find no mention of the value of the thermistor resistance at temperature, only comments about what its stability should be. Knowing that you have a value in the mid 4K range is reassuring. My S/N starts with 3. Right now, it indicates 10.0000005 VDC on the 3458A and 4230 ohms on the Fluke 8050A. Thanks for your help. Joe -----Original Message----- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of R.Phillips Sent: Sunday, December 29, 2013 8:40 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 732A Questions Hi Joe I also obtained a Fluke 732A back in October last, and I have fitted a new set of SLA batteries and it is working just fine - I am still very impressed by its accuracy and stability, and its build quality. First, the external 3-pin power socket is a HYPERTRONICS 'D' type connector (female) type 100-166 - but I have not found one to date ! I also expected the temperature monitoring thermistor to give a 3 to 4 K ohms, as indicated in the manual P/N 645051 dated May 1983 - but I guess that you have a later model as I do, mine being serial # 4845***, some modifications were made,and I understand that this included a change of thermistor, so the standard reading is in keeping with your result. My unit gives a very stable 4.520 K ohms, being between 4.52080 and 4.52090 K ohms. Judging by your findings, you are also using the 1983 copy of the User Manual - we could both use a more up to date issue. I am awaiting the repair of my 3458A - so I am having to rely upon a recently calibrated Keithley 2015 and my good old 3456A - but they both give very impressive results - The Keithley giving 1.000007 volts for the 1 volt output, and 10.00000 volts for the 10 volt output (how I miss that final digit). Looking forward to your further results and any other owners comments. Best regards Roy -----Original Message----- From: J. L. Trantham Sent: Saturday, December 28, 2013 10:51 PM To: volt-nuts@febo.com Subject: [volt-nuts] Fluke 732A Questions I have reviewed the prior postings on Volt-nuts (a very rewarding review, BTW)) regarding the 732A and have two questions: 1. Has anyone determined the part number, or a source, for the mating plug to J10, the external power connector for the 732A-7005 battery pack? I noted some postings recently about this but did not find a definitive response regarding the identity of this plug. The alternative would appear to be a complete replacement of J10 and its plug, as long is it all fits in the opening in the panel. I hate to 'bore holes' in vintage equipment. 2. The oven thermistor in my 'new to me' unit measures 4229 ohms (+/- an ohm or two) after the unit has warmed up for a week or so. I note the manual refers to 3K to 4K for the value of this thermistor when the unit is 'stable' as well as other's posting values in the mid 3500's ohms for their units. Should I be concerned? The unit seems to be stable to within about 2 uV over about a week (as measured by my 3458A - see below). Should I open the unit and try to measure the oven temperature or just be satisfied that the unit seems to be working? I had to replace the four 6V 4AH SLA batteries and they charged up appropriately as judged by the front panel LED's. I had to remove the 'jumper' for the '40' option on the A7 board and connect the jumper to the '20' and '10' options (total of '30') in order to get the unit to adjust to 10.0000000 VDC on my 'Agilent In Cal'd' 3458A. The need to change the jumpers, perhaps, could be just an ageing issue or, on the other hand, a 'temperature' issue with the oven. Should I open the unit and directly measure the temperature (supposedly about 48 degrees C) or just be satisfied with what I have? My recently added 735C also needed moving some 'jumpers' in order to get it 'on scale', as determined by my 3458A, although it's thermistor measures about 3330 ohms (after being on for several weeks). Thanks for everyone's help. Joe _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.