Was just watching a video on the IM-1212. Turns out it has a 0.00 to 1.99 2-and-a-half digit range. It uses another single element tube/lamp for the "1" digit and an "overload" neon lamp when out of range warning. Later models were changed to use 7-segment LED displays (IM-1210 model). Apparently it was also branded under the DeVry brand (the now defunct electronics school I assume) and the Bell & Howell version you have. Interesting bit of kit and a good intro to learning how test equipment worked back then.
Was just watching a video on the IM-1212. Turns out it has a 0.00 to 1.99 2-and-a-half digit range. It uses another single element tube/lamp for the "1" digit and an "overload" neon lamp when out of range warning. Later models were changed to use 7-segment LED displays (IM-1210 model). Apparently it was also branded under the DeVry brand (the now defunct electronics school I assume) and the Bell & Howell version you have. Interesting bit of kit and a good intro to learning how test equipment worked back then.
https://www.youtube.com/watch?app=desktop&v=aA4_dLL2QC0
I've seen Heath, B&H and Schlumberger, but never a DeVry unit. B&H did the school thing for a while as well.
I'm going to press it into service as a pilot light with numbers for the 5V rail on my network rack.
I've seen Heath, B&H and Schlumberger, but never a DeVry unit. B&H did the school thing for a while as well.
I'm going to press it into service as a pilot light with numbers for the 5V rail on my network rack.
(post is archived)