[volt-nuts] vSolartron7081 rom reading

[Charles Black]

MK,

All you need to do is unplug the jones plug where the key wiring goes to 
the circuit board. No need to do any wiring!

Charlie


On 1/15/2013 5:00 PM, J. L. Trantham wrote:
> MK,
>
> Where are you?  If you can't get a key made, I can probably send you one.
>
> IIRC, you can 'activate' the key by removing a wire from the key switch.
> That places it in 'CAL' mode.  The schematic easily demonstrates this.  I
> don't think it was 'shorting' the two switch wires.  Of course that requires
> you to remove the top of the meter.
>
> Joe
>
> -----Original Message-----
> From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
> Behalf Of m k
> Sent: Tuesday, January 15, 2013 4:30 PM
> To: volt-nuts at febo.com
> Subject: Re: [volt-nuts] vSolartron7081 rom reading
>
>
> I just noticed a gotcha, I need to set the key to calibrate before I may
> issue those commands, I guess I need a key. I have printed off the photo and
> measurements someone on this board did, now to get to a key shop...
>
> M K
>
>> From: david.partridge at perdrix.co.uk
>> To: volt-nuts at febo.com
>> Date: Sun, 13 Jan 2013 17:14:07 +0000
>> Subject: Re: [volt-nuts] vSolartron7081 rom reading
>>
>> If all you want is to save the calibration factors, just issue
>> CALIBRATE,DUMP command
>>
>> To refresh the EAROM calibration factors, issue CALIBRATE,REFRESH -
> barring component failure that should be good for another ten years or so.
> You can also display the NVM contents with the MONITOR command, but NOT
> re-write them.
>> The only way that I am aware of that will write the caibration constants
> if they have been lost is to run a full calibration.
>> Again all this in chapter 8.
>>
>> I don't know which ROM programmers that can read or write the ER3400 (just
> ignorance - there may be loads).
>>
>> Regards,
>> David Partridge
>> -----Original Message-----
>> From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com]
>> On Behalf Of m k
>> Sent: 13 January 2013 16:57
>> To: volt-nuts at febo.com
>> Subject: Re: [volt-nuts] vSolartron7081 rom reading
>>
>>
>> Hi David,
>>
>> well it is currently working and close to calibrated as far as I can tell.
> But I want to get those calibration factors saved before it dies on me. Last
> calibrated 2008, and well down on drift by now.
>> I get a diurnal 0.14 microvolt drift with a shorting plug that stays on
> when not in use. a drift of about 0.1 microvolts in about 3 weeks. Nothing
> else to confirm anything else as I have only just got it chatting out
> through the rs232.
>> I will have to buy something to read them with.
>>
>> M K
>>
>>
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