[volt-nuts] Need Guildline 9975 Information
Joe Hobart
nova at npgcable.com
Thu Jan 2 10:13:30 EST 2014
Hi Fred,
I plan to work out as many details as I can before I trouble Guildline. Judging
from the price they quoted me for a model 9350 10 Ohm Hamon transfer standard, I
probably will not buy many new items from them. I want to ask only the most
critical and difficult questions.
Thanks to Ben, I ordered a manual from Manuals Plus. That should answer many
questions about 9975 controls with obscure functions (like what does the OUT -
PCA switch do?).
The 9975 is comparing two 1000 Ohm resistors, but I have not been able to use a
10K Ohm resistor as either standard or unknown. Hopefully the manual will
suggest better control settings and how to minimize drift due to temperature
changes.
Thanks,
Joe
On 1/1/2014 11:52 PM, pa4tim at gmail.com wrote:
> Have you asked Guildline. They gave me a copy of some documents and advise when
> I was restoring my guildline standardcell cabinet oven
>
>
> Fred PA4TIM
>
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> Van: ben
> Verzonden: donderdag 2 januari 2014 04:10
> Aan: volt-nuts
>
>
>
>
>
> Hello Joe, If you're stuck for a manual I know that Manuals Plus have a
> paper copy for sale. Im also interested in the 9975, but have no experience
> with it. I would go you halves in buying the manual if you want - I would
> be happy with a scan. Cheerio, ben.
>
>
>
>
> ----------------------------------------
> From: "Joe Hobart" <nova at npgcable.com>
> Sent: Wednesday, January 01, 2014 8:37 AM
> To: volt-nuts at febo.com
> Subject: [volt-nuts] Need Guildline 9975 Information
>
> A used Guildline 9975 DC Current Comparator Resistance Bridge arrived in a
> big
> box yesterday. After some repairs, the unit appears to work, but I have
> never
> used one of these bridges before.
>
> Why do I say it appears to work? Here are two measurements comparing one
> Ohm
> resistors at 30 mA current:
>
> L&N 1 Ohm versus Resistor #2 0.9999372
> Resistor #2 versus L&N 1 Ohm 1.0000630
>
> The above measurements appear consistent (or I got lucky), but there are
> several
> controls/functions I do not understand how to set or use.
>
> Does anyone have a Guildline 9975 manual I can buy or borrow and copy?
>
> Who has experience with the 9975 and can give me some pointers?
>
> Thanks and Happy New Year everyone,
> Joe Hobart
> Flagstaff, Arizona
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