From: Jeff Buck (jeffbuck@swcp.com)
Date: 11/27/02-06:37:42 PM Z
Thanks all for the suggestions.... Ed's proposal to mask the photo cell
with exposed film worked. It took three layers! But now the system is
w/in range w/ options as to physical positioning of the probe while
maintaining, w/ dial adjustments, the 1:1 calibration of time:units. Party
time! -JB
At 05:37 PM 11/27/2002 +0000, jeffbuck@swcp.com wrote:
>Thanks, Ed. I'm not at home, so I'm not sure which of these photocells I
>have, but I sure have plenty of exposed film. -JB
>
>Ed Stander <glassact@compuserve.com> said:
>
> > Jeff:
> > Your problem probably lies with the photocell you are using. OLEC makes
> > two round photocells: A PA710, and a PA710D. The PA710 is made for point
> > light sources, and is very sensitive. the 710D is designed for 1000 watt
> > quartz lamps, and is therefore less sensitive. The difference is a sheet
> > of exposed film between the cover of the photocell and the cell itself.
> > Cut yourself a round piece and throw it under the cell cover, and you
> > should be all right.
> > Also - I don't have a manual for your integrator here (though it is
> > avaliable from olec). Many integrators have a small adjustable screw
> > beneath the photocell plug on the back of the integrator. This is used to
> > calibrate the integrator so that 1 unit of light equals one second of
> > exposure time. Good luck - Ed Stander
> >
>
>
>
>--
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