A even better fix is to contact Bogen and get the adapter for less than
$20. Adapter replaces both cells.
Rand E.
HI100@xxxxxxx wrote:
>
> flzhgn@xxxxxxxxxxxxxx writes:
>
> << I wonder if someone has a fix for my reliable
> old Gossen Luna Pro light meter ?
> >>
> This should be easy to convert if you have soldering skills, assuming it is a
> conventional Cds meter.
> Just connect a Germanium diode for each mercury cell, in series with battery
> lead.
> For example if the meter uses two 1.35V mercury cells use two diodes etc.
> If it uses a mercury battery containing multicells just figure out how many
> cells by dividing the rated voltage by 1.35.
>
> A much better fix is to parrallel the actual meter movement itself, with a
> suitable shunt resistor.
> You would need to open it up enough to get at the meter leads rather than
> just the battery leads
> This is the most accurate conversion (as good as the original meter) much
> better than the diode conversion (which adds non-linearity errors) and is my
> recommendation for OM1 conversion.
> You need to know/measure the meter movement resistance to calculate the shunt
> resistor to use.
>
> Regards,
> Tim Hughes
> >>Hi100@xxxxxxx<<
>
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