AH2500A

Started by Squidley, 01-03-2013 -- 08:52:50

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Squidley

01-03-2013 -- 08:52:50
Anyone have a MetCal ACC file for the AH2500A bridge? or any of the other Andeen Hagerling bridges?
Douglas J. Baird, USN(ret),

Hawaii596

#1
01-07-2013 -- 16:57:31
Send me a PM tomorrow morning to remind me.  One of our other sites has an AH2500A and use MetCal, but not sure if they have an ACC file for it or not.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

Hawaii596

#2
01-14-2013 -- 11:21:30
I alreasdy PM'ed the person who asked me about the ACC file.  But for the general audience's info, I looked and apparently it was being used manually, so there was not an ACC file available for the AH2500A at our other lab.   If anyone else happens to have one, let me know, as I could use one also.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

Hawaii596

#3
05-19-2015 -- 16:00:12
ACCREDITED VENDOR FOR AH 2500 and 1100 Capacitor (100 pF).

Does anyone know of accredited vendor(s) who may be able to calibrate this?  I can send to OEM, but they aren't accredited.  Probably not very many high end vendors for this.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

Snap

#4
05-19-2015 -- 21:58:52
Quote from: Hawaii596 on 05-19-2015 -- 16:00:12
ACCREDITED VENDOR FOR AH 2500 and 1100 Capacitor (100 pF).

Does anyone know of accredited vendor(s) who may be able to calibrate this?  I can send to OEM, but they aren't accredited.  Probably not very many high end vendors for this.

If you have the 100 pF capacitor you should be able to calibrate the bridge yourself.  As far as the capacitor, we send ours to Primary Standards North America in California, which was just bought out by Keysight. 

Squidley

#5
05-20-2015 -- 08:19:31
Here at the NASA/JSC Cal Lab we do our own Accredited Calibrated using an AH 11A100 and a AH 11A10 that we have cal'd at NIST... our procedure also uses a HP 34401, a HP 53132A, and a Fluke 742-10K.
Douglas J. Baird, USN(ret),

microwave-kevin

#6
05-27-2015 -- 07:11:27
Quote from: Hawaii596 on 05-19-2015 -- 16:00:12
ACCREDITED VENDOR FOR AH 2500 and 1100 Capacitor (100 pF).

Does anyone know of accredited vendor(s) who may be able to calibrate this?  I can send to OEM, but they aren't accredited.  Probably not very many high end vendors for this.

We send our 1100s (and all our cap standards) to METAS (Swiss National Lab) and do the 2500 ourselves

Hawaii596

#7
05-27-2015 -- 08:24:53
I only have the one 100 pF in my AH1100.  It has a four-banger front panel, but only the one installed.  Is that sufficient to cal the 2500A.  We inherited this system from our other lab that closed, and want to work on adding this system and its measurands to our scope of accreditation.  Do you have (or anyone here have) the full cal procedure for the 2500A using the 1100 standard?  Just need to know how I can plot uncertainties.  Seems like I would need a full set of the caps in the 1100 to do a proper cal on the 2500A.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

microwave-kevin

#8
06-01-2015 -- 07:31:39
All you need is one cap, the 100 pF will work. Cal procedure (oper / maintenance manual is large 22 MB in pdf), if you have an ftp server somewhere I can upload
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