Using Horseman Exposure Meter

I would like to know the procedure for using this meter. I have just picked up a n older model that uses a 5.4 volt battery which has been modified to accept new er cells. The meter has the 4 x 5 adapter and attaching it to the camera is stra ight forward matter but beyond that I could use some help. How are readings take n? Do you need to 'reset' or activate the meter in some manner? How do you use t he F.S.V. scale? (Is this similiar to the zone system?)(Are any on-line manuals available?) Thank you for sharing your experiences.

DC

I read the info in the earlier post about "FSV" and am assuming that my meter is not functioning correctly. I receive a dial reading of FSV 16 regardless of a change in aperature when I follow the directions. Will assume this to be a battery problem. Sorry for the repetitive posting and thanks for the help.

DC