[volt-nuts] Fluke 732A Questions

J. L. Trantham jltran at att.net
Sun Dec 29 18:55:00 EST 2013


Thanks for the info.

The picture of the socket on the Nitrogen LASER certainly looks like what
the Hypertronics catalog shows and the part number for the plug is certainly
similar (except the LASER has female connectors and the plug has male
connectors) to what I would think would be the plug for the 732A.  However
the picture of the D01 socket on the LASER is not the same as the socket on
the 732A.  The plug, though, might fit both.

I emailed Hypertronics asking if there is a link between Hypertronics and
'FRE' (whatever that is) and if the part number I came up with is available
or not.  The 'automated' responses mentioned 'out of the office' until Jan 6
or so.

We'll see what response I get.

Did you, perhaps, get a plug with the LASER?  If so, did you see if it would
fit the 732A?

Thanks again for the info.


-----Original Message-----
From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
Behalf Of Robert Atkinson
Sent: Sunday, December 29, 2013 1:14 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Fluke 732A Questions

Hi Joe,
As Roy has already said, this is a hypertronics connector. I've had one
other piece of equipment with this type of connector, a nitrogen laser. See
< http://www.thinksrs.com/products/NL100.htm > The downloadable user manual
has details. Sorry, I don't have any, or a cheap source.

Robert G8RPI.

 From: J. L. Trantham <jltran at att.net>
To: volt-nuts at febo.com 
Sent: Saturday, 28 December 2013, 22:51
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.


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