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Firmware Upgrade for Model 2001-M
Keithley Instruments, Inc.
28775 Aurora Road Release Notes
Cleveland, Ohio 44139
(440) 248-0400
www.keithley.com
Average responding RMS
This firmware upgrade includes an average-responding RMS converter to provide
average-responding RMS readings (RMS-Average). This new AC type uses the averaging
AC detector, but multiplies the average of the rectified signal by the following correction
factor:
--------- = 1.11
-
2 2
When used for a sinusoidal signal, the RMS-Average value is the same as the true RMS
value. RMS-Average readings for non-sinusoidal signals will not be true RMS.
Sinusoidal signal