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: [email protected] [mailto:[email protected]] On
Behalf Of m k
Sent: Tuesday, January 15, 2013 4:30 PM
To: [email protected]
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: [email protected]
To: [email protected]
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: [email protected] [mailto:[email protected]]
On Behalf Of m k
Sent: 13 January 2013 16:57
To: [email protected]
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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