[Test-Equipment] Question about VTVM calibration

[Brian Harris]

The calibration procedure for the ME-26 calls for 1VDC and 1,3,10,30,100,300 VAC sources. I don’t know about the HP procedure. 

Sent from my iPhone

> On Feb 5, 2020, at 11:16 AM, Blair Batty <blairbatty at gmail.com> wrote:
> 
> The voltage only has to be higher than the calibrated output. If all you
> want is 7.500vdc and lower, a common 9v transistor battery will do.
> /b
> 
>> On Wed, Feb 5, 2020 at 12:04 PM Barry <n4buq at knology.net> wrote:
>> 
>> That's what I was finding as well.  The battery costs more than the
>> calibrator.
>> 
>> Thanks,
>> Barry - N4BUQ
>> 
>> ----- Original Message -----
>>> From: "Blair Batty" <blairbatty at gmail.com>
>>> To: "Discussion of Electronic Test Equipment" <
>> test-equipment at mailman.qth.net>
>>> Sent: Wednesday, February 5, 2020 10:59:10 AM
>>> Subject: Re: [Test-Equipment] Question about VTVM calibration
>>> 
>>> The battery is very expensive, so I just power it from my Rigol power
>>> supply.
>>> /b
>>> 
>>>> On Wed, Feb 5, 2020 at 11:49 AM Barry <n4buq at knology.net> wrote:
>>> 
>>>> Hi Brian,
>>>> 
>>>> What kind of battery do you use (or do you power it from a DC supply?)
>>>> 
>>>> Thanks,
>>>> Barry - N4BUQ
>>>> 
>>>> ----- Original Message -----
>>>>> From: "Blair Batty" <blairbatty at gmail.com>
>>>>> To: "Brian Harris" <cosmophone at yahoo.com>, "Discussion of Electronic
>>>> Test Equipment" <test-equipment at mailman.qth.net>
>>>>> Sent: Wednesday, February 5, 2020 7:21:42 AM
>>>>> Subject: Re: [Test-Equipment] Question about VTVM calibration
>>>>> 
>>>>> 
>>>> 
>> https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
>>>>> 
>>>>> 
>>>>> On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
>>>>> test-equipment at mailman.qth.net> wrote:
>>>>> 
>>>>>> 
>>>>>> I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I
>>>> have no
>>>>>> idea how accurate they are. I’d like to obtain some reasonable
>> voltage
>>>>>> references with which I can calibrate them or, alternatively, a
>> service
>>>>>> which can do them for me. I’m in Fayetteville Arkansas. What say
>> ye?
>>>>>> 
>>>>>> Brian WA5UEK
>>>>>> Sent from my iPhone
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