[pure-silver] Re: Meter woes

"William Harting" <wm.harting@xxxxxxxxx>


My Gossen Luna-Pro digital meter (not the flash model) has just about
stopped responding to the buttons.


To be expected with this meter.

They cheaped-out on the keyboard contacts on the printed circuit
board.  Rubber keyboards are only reliable with gold contacts on
the PCB - Gossen used silk-screened conductive plastic for the
contact.  It is possible to get the plastic contacts to work
if capacitive sensing is used - Gossen didn't use capacitive
sensing either.

You need to take the meter apart - as I recall this is not a pleasant
experience.  There are two slots for snap-tabs at the top back of the
meter, you somehow need to disengage them and then pull the meter
halves apart.

Clean the back of the keyboard with 91% isopropyl and a good scrub
with a toothbrush, ditto the circuit board.  Then clean the circuit
board contacts with a clean pencil eraser.

That will get it back into working condition for a few more years.

Nicholas O. Lindan
Cleveland Engineering Design, LLC
Cleveland, Ohio 44121

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