Poll
Nuts,
I'm curious to know if people are maintaining their own standards of voltage and resistance. If so, do you have a single standard or multiple? How often do you send your standard(s) for calibration? How often do you perform comparisons between your multiple standards?
Do you maintain a standard "just because" or do you use it to calibrate other equipment (e.g., artifact calibration of a multimeter)?
Thanks.
Randy.
Hi Randy,
I maintain multiple standards for voltage and resistance. Before 2006 I
performed intercomparisons daily. After that I dropped back to monthly. I'm
not currently doing intercomparisons, so I need to get caught-up and get
back to doing that.
I send one 10Vdc std and one 10k ohm std to a primary standards lab every
few years. I trend them based on their historical data.
The main reason I maintain 10Vdc and 10k ohms is to verify those cardinal
points on my HP 3458A DMMs - and for artifact cal of them when necessary.
Best,
Greg
----- Original Message -----
From: "Randy Scott" scottr9@yahoo.com
To: volt-nuts@febo.com
Sent: Wednesday, December 30, 2009 9:53 AM
Subject: [volt-nuts] Poll
Nuts,
I'm curious to know if people are maintaining their own standards of voltage
and resistance. If so, do you have a single standard or multiple? How
often do you send your standard(s) for calibration? How often do you
perform comparisons between your multiple standards?
Do you maintain a standard "just because" or do you use it to calibrate
other equipment (e.g., artifact calibration of a multimeter)?
Thanks.
Randy.
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https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
Randy,
I have two Fluke 731B's, one black face, one white face, both from the
'bay'. I had to fabricate a battery pack for each of them using standard AA
or AAA cells and a collection of battery holders and double sided foam tape
to hold the packs to the 'battery bracket'. If my memory serves, the
batteries I found were within 100 mAH capacity of what the manual called for
and everything has worked well so far. I have never sent them for
calibration. I use them to have some reasonable reference in my workshop.
I have two Fluke 8050A's and an HP 3478A all of which were calibrated in
their past lives but never by me. There is agreement between the 8050A's.
At 10 Volts, one 731B reads 10.000 and the other reads 9.999 on the 8050A's.
On the 3478A, one reads 10.0003 and the other reads 10.0005. On 1 V, one
reads 1.000 and the other reads 0.999 on the 8050A's. On the 3478A, they
both read 1.00003.
From this I can conclude that everything agrees within about 1 mV and,
probably, everything is 'reasonably' accurate, at least for my purposes.
The other conclusion would be that everything in my entire shop is off by
roughly the same amount. Since I have 5 independent pieces of data, the
odds are the first conclusion is correct.
I have no resistance standards but would like to get some. I would welcome
any suggestions. Low maintenance (i.e. high stability) is desirable.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] On
Behalf Of Randy Scott
Sent: Wednesday, December 30, 2009 10:54 AM
To: volt-nuts@febo.com
Subject: [volt-nuts] Poll
Nuts,
I'm curious to know if people are maintaining their own standards of voltage
and resistance. If so, do you have a single standard or multiple? How
often do you send your standard(s) for calibration? How often do you
perform comparisons between your multiple standards?
Do you maintain a standard "just because" or do you use it to calibrate
other equipment (e.g., artifact calibration of a multimeter)?
Thanks.
Randy.
volt-nuts mailing list -- volt-nuts@febo.com
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https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
I'm just getting started.
No calibration.
3 Hp3456A non working military surplus they were calibrated in the distance past
2 Geller SVR kits one 5v one 10v
Looking for precision resistors in my junk pile stuff.
I use a junk pile mercury cell to compare my volt ohm meters to see how they compare.
No reason or need just because.
Stanley
In the inventory are
- Voltage standards
Datron 4910
Guildline 4410 - Resistance standards
ESI DB877 box to 10M
Absolute Ohm resistors from 1m to 10k by Bleeker - Inductance standards
Different General Radio Primary inductors - Calibrator
Fluke 5200 - Measuring
8 digit
HP 3458A
7 digit
Fluke 8506
Keithley 2001
Keithley 2010
Philips PM2530
6 digit
HP 34401A
Different Keithley and HP units for very low voltage (1pV)
, very low current (100aA) and high resistance (>POhm)
Frequency
SR620
HP 53132
Impedance
General Radio 1620
General Radio 1689M
Ando AG-4311 for which i search for the manual
Tongui
ElectronicsAndBooks at Yahoo dot com
http://www.ElectronicsAndBooks.tk
--- On Wed, 12/30/09, Randy Scott scottr9@yahoo.com wrote:
From: Randy Scott scottr9@yahoo.com
Subject: [volt-nuts] Poll
To: volt-nuts@febo.com
Date: Wednesday, December 30, 2009, 11:53 AM
Nuts,
I'm curious to know if people are maintaining their own
standards of voltage and resistance. If so, do you
have a single standard or multiple? How often do you
send your standard(s) for calibration? How often do
you perform comparisons between your multiple standards?
Do you maintain a standard "just because" or do you use it
to calibrate other equipment (e.g., artifact calibration of
a multimeter)?
Thanks.
Randy.
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.