[pure-silver] Re: Meter woes

Nicholas, you did it. As you said, they cheaped out on the rubber contacts.
Took the meter apart. Released the back by flexing the two snap-tab slot
catches, removed the back, removed the circuit board (two brass screws top
right and bottom left), cleaned the button backs and the contacts,
reassembled, and, at least for the moment, it works like a dream.

Thanks, bill

On Sat, Mar 28, 2009 at 6:09 PM, William Harting <wm.harting@xxxxxxxxx>wrote:

> Thank you sir. The meter is effectively unusable as it is, so there is not
> much to lose. I'll give the cleaning a try. Meanwhile there are other
> meters: I can get out the Master V, for example, which is still ticking
> along.  And the Luna Pro F is good, or the Pilot, which I just took on a
> drive to Texas.
>
> -bill h
>
>
> On Sat, Mar 28, 2009 at 11:21 AM, Nicholas O. Lindan <
> nolindan@xxxxxxxxxxxxx> wrote:
>
>> "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
>>
>>
>> =============================================================================================================
>> To unsubscribe from this list, go to www.freelists.org and logon to your
>> account (the same e-mail address and password you set-up when you
>> subscribed,) and unsubscribe from there.
>>
>
>

Other related posts: