Quote: (Originally Posted by
4ster)
When a small panel meter is used for measuring PO2, the designs I have seen put a 10k load on the cell. Do you do the same when measuring cell voltage? Why?
Because that's what it says in the manufacturers spec for the Teledyne's.
Actually I'm quite sure they mean 'not less than 10K'.
Actually this only makes sense if you are using a nice high impedance electronic panel meter. If you are using a moving coil 'real' one you'll be pushed to get the total load up to 10K even with a very sensitive one.
You're only expecting 60mV or so in 100% so choose your panel meter carefully. A lot of the electronic ones are 2V minimum full scale unless you delve into the works.