[volt-nuts] vSolartron7081 rom reading

[m k]

Hi Charlie,

partial success, calibrate,refresh worked, the display told me so, but the calibrate,dump command did not do anything visible.

M K

> Date: Tue, 15 Jan 2013 18:08:02 -0800
> From: cblack at centurytel.net
> To: volt-nuts at febo.com
> Subject: Re: [volt-nuts] vSolartron7081 rom reading
> 
> 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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> 
> 
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