How to install your SEL LED.
First remove the old bulb/battery tube, this is not needed
anymore. Some SEIs have a stud in the battery compartment see
below for details.
Balance the SEL LED on top of the NEGATIVE end of the cell, the non pip
end. Don't panic if you get it backwards it just won't work, no
damage will be done.
Simply insert all the way in and replace the cap.
To use, turn the rheostat on the bottom of the cap fully clockwise then
it is just as normal except there is no calibration process.
Indeed the meter may not move at all and is now redundant.
The SEI LED leaves me adjusted to my SEI, yours may be different, to
adjust the output of the SEL LED there is a trimmer on the PCB.
Do a few tests, get a value for any offset, this may only be 1/3 stop
The way I adjust mine is to find a surface that is evenly lit,
artifical light is best, it is stable. Measure it using the SEI,
note this figure, adjust the trimmer a bit, re measure the surface and
keep on adjusting untill the new reading is the correct amount
different from the first reading.
The trimmer, clockwise for dimmer, this has the effect of increasing
the reading on the SEI.
There are some SEI Photometers with a stud in the battery/bulb
compartment, this stud needs to be removed.
If your tube has this hole in it there may be a stud in the battery
Here it is, simply remove the three screws and withdraw the ring and
stud with a pair of tweezers, it is best to keep the SEI meter down
during this to save the photocell dropping out.
Just undo this screw and re insert the ring, getting the screws back
can be fun, I use some BluTak to hold them onto the end of the driver.