Operating manual for Fischer Deltascope MP3

[J]

I have an old Fischer ferrite meter which has not seen use in several
years. A customer is asking to detemine ferrite content for
production welds. I intend to send the instrument out for calibration
and to perform maintenance as necessary. However, the instrument
manual has some how been lost. Would any have a similar instrument
and be willing to share a coupy of the operating manual. The ID tag
on the back of the instrument reads as follows:

Fischer Technology, Inc.
Deltascope MP3
No. 111-12114A
Made in USA Bat 9V IEC: 6LF22

Front of instrument simply idntifies the meter as: Feritscope

Any help would be greatly appreciated.

Thanks - John