[volt-nuts] Solartron 7081 NVM FAIL
David C. Partridge
david.partridge at perdrix.co.uk
Wed Apr 25 15:18:57 UTC 2012
Bad news I think
Vdc calibration constants
Vac calibration constants
kOhm calibration constants
Top Ohms range calibration constants
Ratio terminals calibration constant
Zener current token value
Calibrate = Fail 1
Refresh fail nvm page 1 & 2 are faulty
From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On Behalf Of David C. Partridge
Sent: 25 April 2012 14:50
To: 'Discussion of precise voltage measurement'
Subject: [volt-nuts] Solartron 7081 NVM FAIL
The 74LS161 was the cuplrit, and the meter now starts up to display the NVM FAIL message. Substitution of the NVM from another meter gave INITIALISED, so the problem is the ER-3400.
I'm trying to work out whether the NVM FAIL message means just page one of the calibration constants is gone and page two was OK, or whether both pages are trashed?
I can't remember - does the serial port use a "straight through" connection - if so that would explain why it won't talk to me.
If both pages are trashed, what hope to recalibrate the zener?
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