Installation manual
Operation Manual for LCD Digital Readouts  Page 6 of 48 
SECTION 1  GENERAL INFORMATION 
Introduction 
ProScale® digital measuring systems are affordable precision electronic 
devices for making linear measurements with speed and accuracy. ProScale 
consists of a SCALE, an ENCODER (also called READHEAD) and a DIGITAL READOUT 
(DRO). ProScale Models 150 and 250 use Capacitive Absolute measuring 
technology, while the Model 180, 280, 380 & 580 systems use Inductive 
Incremental measuring technology. 
ProScale is ideal for most measuring requirements up to 6m (20ft.) where high 
accuracy, better than 10 µm, (approximately .0005”) is not needed, but 
affordable repeatability, (better than a tape measure), or accuracy to 50 µm 
(.002”) is desired.  
Because ProScale shows the exact measurement on its Digital Readout, it 
eliminates the guesswork involved in reading and interpreting tape measures, 
scales & pointers, or shaft encoders. It is compatible for any general purpose 
measurement application where data is collected (SPC, RS232, RS485 or 
wirelessly) and/or digital accuracy and repeatability is desired. It is also 
suitable for retrofitting, or as original equipment, on most types of machinery. 
ProScale Model 150 & 250 General Purpose Measuring Systems and products 
based on Absolute measuring technology can be used with any of the several 
different Digital Readout models available. 
ProScale Model 180, 280, 380 & 580 Systems and the products using Inductive 
technology may be used with a select group of Digital Readouts available from 
Accurate Technology. 
This manual covers only Digital Readouts (DROs) with an LCD display and with 
operating firmware (FW) of 3.0 or greater. 










