VT33CT datasheet(18/76 Pages) PERKINELMER

18 / 76 page

Photoconductive Cell Testing and General Notes

Production Testing of Photocells - PerkinElmer’s New Approach

Historically within this industry, vendors have set their

production testers to the limits specified on the

customer’s print. Measurement errors due to ambient

temperature, calibration of light source, light history

effect, plus any tester errors have always guaranteed that

a certain percentage of the cells shipped are out of

specification.

This practice is incompatible with the realities of today’s

marketplace, where quality levels are being measured in

parts per million.

With this new catalog, PerkinElmer is taking the

opportunity to correct this situation. for parts in this

catalog, PerkinElmer has pulled in the test limits on our

production testers to compensate for measurement

errors.

General Notes

(Refer to the following data specification pages.)

Photocells are supplied categorized into groups by resistance. All groups must be purchased together and PerkinElmer maintains

the right to determine the product mix among these groups.

Dimension controlled at base of package.

Photocells are tested at either 1 fc or 10 lux. 2 fc typical values shown in the tables are for reference only.

Cells are light adapted at 30 - 50 fc.

The photocell “grid” pattern can vary from that shown. PerkinElmer reserves the right to change mix grid patterns on any standard

product.

The resistance for any standard cell is controlled at only one light level. If the resistance at other light levels is a concern, please

contact the factory.

VT33CT Datasheet(PDF) 18 Page - PerkinElmer Optoelectronics