Solartron 7081 randomly re-initialises
One of my 7081s will occasionally re-start from running in TRACK mode,
ending up with the INITIALIZED message on the display.
Does anyone have any thoughts as to likely faults that would cause this?
Dave
guestimate, executes a cold start caused by low voltage.
so would check 5V for drops and ripple.
keep us posted on your findings
Gesendet: Donnerstag, 14. April 2016 um 11:45 Uhr
Von: "David C. Partridge" david.partridge@perdrix.co.uk
An: "'Discussion of precise voltage measurement'" volt-nuts@febo.com, Solartron_Schlumberger_Equipment@groups.io
Betreff: [volt-nuts] Solartron 7081 randomly re-initialises
One of my 7081s will occasionally re-start from running in TRACK mode,
ending up with the INITIALIZED message on the display.
Does anyone have any thoughts as to likely faults that would cause this?
Dave
volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
That makes sense though +5V looked OK, I'll look a bit harder!
-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@febo.com] On Behalf Of acbern@gmx.de
Sent: 14 April 2016 11:26
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Solartron 7081 randomly re-initialises
guestimate, executes a cold start caused by low voltage.
so would check 5V for drops and ripple.
keep us posted on your findings
Gesendet: Donnerstag, 14. April 2016 um 11:45 Uhr
Von: "David C. Partridge" david.partridge@perdrix.co.uk
An: "'Discussion of precise voltage measurement'"
volt-nuts@febo.com, Solartron_Schlumberger_Equipment@groups.io
Betreff: [volt-nuts] Solartron 7081 randomly re-initialises
One of my 7081s will occasionally re-start from running in TRACK mode,
ending up with the INITIALIZED message on the display.
Does anyone have any thoughts as to likely faults that would cause this?
Dave
volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
David,
I have had a similar issue with mine but only on days when my stand-by generator turns on, takes the load for the house, then switches the load back to the street and shuts down. There is clearly a brief 'power hit' when this occurs. I've never tried to chase this down because it is relatively 'rare'.
There is a fairly 'complex' shut-down circuitry in the 7081 described in the service manual and I wonder if you have an issue there.
In any event, I suspect a 'power issue'.
Good luck.
Joe
-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@febo.com] On Behalf Of David C. Partridge
Sent: Thursday, April 14, 2016 6:09 AM
To: 'Discussion of precise voltage measurement'
Subject: Re: [volt-nuts] Solartron 7081 randomly re-initialises
That makes sense though +5V looked OK, I'll look a bit harder!
-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@febo.com] On Behalf Of acbern@gmx.de
Sent: 14 April 2016 11:26
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Solartron 7081 randomly re-initialises
guestimate, executes a cold start caused by low voltage.
so would check 5V for drops and ripple.
keep us posted on your findings
Gesendet: Donnerstag, 14. April 2016 um 11:45 Uhr
Von: "David C. Partridge" david.partridge@perdrix.co.uk
An: "'Discussion of precise voltage measurement'"
volt-nuts@febo.com, Solartron_Schlumberger_Equipment@groups.io
Betreff: [volt-nuts] Solartron 7081 randomly re-initialises
One of my 7081s will occasionally re-start from running in TRACK mode,
ending up with the INITIALIZED message on the display.
Does anyone have any thoughts as to likely faults that would cause this?
Dave
volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
In message 001501d19632$743ab230$5cb01690$@perdrix.co.uk, "David C. Partridge
" writes:
Does anyone have any thoughts as to likely faults that would cause this?
EPROMs loosing bits is a good candidate.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
What Poul-Henning is alluding to is an EPROM is a device where
data bits are stored in little buckets of charge. How full a
bucket is determines whether it is a "1" or a "0". How full the
bucket appears to be depends on the 5V supply going to the chip.
If the EPROM has leaked off much of the charge from the buckets,
small changes in the 5V supply can make the difference between
the EPROM reading the data correctly, and not.
Parts that display this problem can very often be fixed by
lowering the VCC supply to the EPROM when reading the part into
the programmer, erasing the chip, and then writing it in a normal
fashion.
-Chuck Harris
Poul-Henning Kamp wrote:
In message 001501d19632$743ab230$5cb01690$@perdrix.co.uk, "David C. Partridge
" writes:
Does anyone have any thoughts as to likely faults that would cause this?
EPROMs loosing bits is a good candidate.