User`s manual
ProScale M150, M250 and all products with General Purpose LCD Digital Displays  3 of 44 
Table of Contents 
SECTION 1    GENERAL INFORMATION............................................................................... 5 
Introduction....................................................................................................................................... 5 
What This Manual Includes............................................................................................................... 5 
ProScale Terminology....................................................................................................................... 7 
Scales .............................................................................................................................................. 8 
Absolute ........................................................................................................................................ 8 
Incremental.................................................................................................................................... 9 
Shortening Scales.......................................................................................................................... 9 
Readheads....................................................................................................................................... 9 
Readheads..................................................................................................................................... 10 
Absolute ...................................................................................................................................... 10 
Incremental.................................................................................................................................. 10 
Digital Displays............................................................................................................................... 11 
General Purpose Surface Mount .................................................................................................. 11 
General Purpose 1/4 DIN Panel Mount......................................................................................... 11 
Other Digital Displays................................................................................................................... 11 
1/8 DIN Panel Mount................................................................................................................. 11 
1/4 DIN Panel Mount................................................................................................................. 11 
Dual Input Panel Mount............................................................................................................. 11 
Product Specifications..................................................................................................................... 12 
ProScale Model 150 & Model 250 ................................................................................................ 12 
SECTION 2    PROSCALE MODEL 150...................................................................................... 13 
Installation...................................................................................................................................... 14 
Calibration...................................................................................................................................... 16 
Maintenance................................................................................................................................... 16 
SECTION 3    PROSCALE MODEL 250...................................................................................... 17 
Installation...................................................................................................................................... 18 
Calibration...................................................................................................................................... 20 
Maintenance................................................................................................................................... 20 
SECTION 4    DIGITAL DISPLAY OPERATION........................................................................... 21 
Surface Mount Displays .................................................................................................................. 21 
Basic Display............................................................................................................................... 21 
Fully Programmable, Battery Operation........................................................................................ 22 
Fully Programmable, 24VDC........................................................................................................ 22 
Mounting the Surface Mount Display............................................................................................ 22 
Panel Mount Displays..................................................................................................................... 23 
Fully Programmable, Battery Operation........................................................................................ 23 










