filters

[David Lesher]

Seeking a source for small quantities of filters usable on DPM
displays. We've finally found some meters that are 2 or 3 wire;
i.e can read their own supply or at least share a ground. But
they are BRIGHT and we need to reduce that & make them look
better.

Some are blue, others greenish; it may be we want a neutral
gray...

Suggested suppliers?

 

[Nemo]

Seeking a source for small quantities of filters usable on DPM
displays. We've finally found some meters that are 2 or 3 wire;
i.e can read their own supply or at least share a ground. But
they are BRIGHT and we need to reduce that & make them look
better.

Some are blue, others greenish; it may be we want a neutral
gray...

Suggested suppliers?

As you don't state your country you are presumably in the USA. I can't
help you with suppliers of optical filters in your area. But, can't you
just put a resistor in the supply for the light source? Save money, save
power, save the planet and all that. Usually, 3 wire DPM's use one wire
to power the display, one to measure whatever they measure, one as a
shared ground, so reducing the drive to the display shouldn't affect the
reading.

Also possibly relevant, what colour is the display?

 

[Syd Rumpo]

Seeking a source for small quantities of filters usable on DPM
displays. We've finally found some meters that are 2 or 3 wire;
i.e can read their own supply or at least share a ground. But
they are BRIGHT and we need to reduce that& make them look
better.

Some are blue, others greenish; it may be we want a neutral
gray...

Suggested suppliers?

I've used Kapton (polyimide) film to successfully calm down bright blue
displays. Here's one example...

http://uk.rs-online.com/web/p/insulation-films/5363952/

Cheers

 

[David Lesher]

I've used Kapton (polyimide) film to successfully calm down bright blue
displays. Here's one example...

http://uk.rs-online.com/web/p/insulation-films/5363952/

Thanks. That is a good lead but need smaller quantities.