[volt-nuts] Solartron 7081 Calibration Problem

Михаил timka2k at yandex.ru
Mon Sep 3 04:33:18 UTC 2012

'CALIBRATE REFERENCE' command refers to RATIO/REFERENCE input channel
calibration, located on the back side of 7081. It isn't calibration of the
internal voltage reference (zener). So, you should apply a +10 V to 'RATIO HI' input and connect
-10 V to 'RATIO LO', 0V and main input LO.

Mickle T.

Monday, September 3, 2012, 2:57:28 AM, you wrote:
JLT> I went through the calibration process today, using the manual and my 'new'
JLT> Fluke 5100B.  I made a 'short circuit plug' by connecting 'HI' to 'LO' only.
JLT> All was OK until the last step of 'CALIBRATE REFERENCE'.  I kept getting
JLT> 'FACTOR OUT OF RANGE'.  What am I missing?
JLT> However, after checking it against my other, Ametek calibrated, 7081, the
JLT> readings on the various scales are very close, about 10 uV at 10 VDC, for
JLT> instance, and 2 mV at 10 VAC using a 1 kHz signal and about 36 ohms at 1
JLT> MegOhm.  This is a significant improvement from where it started.
JLT> Thanks for any help.
JLT> Joe

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