William Sommerwerck wrote:

I was in bed, watching TV, when I noticed an unfamiliar clicking sound. It
persisted, so I leaned over and saw my Fluke 87's backlight flickering, and
heard it clicking. (The knob was in the off position, by the way.) Turning
it on, then off, ended this weird behavior.

The battery enunciator has been coming on lately, so I have to assume it's a
side-effect of low voltage.

--
"We already know the answers -- we just haven't asked the right
questions." -- Edwin Land


I have an old original Fluke 87 that did that. It turned out that the
switch rotor had got chipped, allowing the switch to rotate just a bit
past the "Off" position.

Cheers

Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net