Installation manual

Manual Part # 800-1402-001 Rev E Page 31 of 48
Compensation Functions
NOTE: The following features are available ONLY on General Purpose Digital
Readouts with firmware ending in ‘C”, (Part # 700-1600-236) supplied on
ProScale Model 580 and ProTable systems.
(The firmware version is displayed on power-up, ie P3.000C).
TEMPERATURE COMPENSATION
This feature provides automatic compensation of measurement variations
caused by changes in the ambient temperature where the measurement
system is being used.
Additionally, coefficients of expansion other than aluminum may be
programmed into the DRO and the resulting measurement compensated for the
different expansion rates based on a temperature sensor inside the DRO.
Use this feature to maintain the highest measurement accuracy possible when
using the system under wide temperature variations or when mounting the
ProScale aluminum scale extrusion to steel or other surfaces having a different
temperature expansion rate than aluminum.
See PROGRAMMING PARAMETERS (Pr41 through Pr44)/
To turn on Temperature Compensation:
1. Set Pr41 to 1.
2. Next, set the compensated Low and High positions using Pr42 & Pr43.
This step sets the lowest and highest ABS measurement value that will
be temperature compensated. Most often this will be at 0.000 and the
maximum measuring range of the system. It is possible however, if the
system has been placed at a non-zero starting point that the ‘lowest’
reading could be a value other than 0.000.
3. If necessary, enter the expansion coefficient for the material the
ProScale aluminum Scale is affixed to in Pr44.
See Pr44 for details relating to the expansion coefficient setting.
Use care if changing this setting. It will affect system accuracy!
Note: Parameters Pr41, 42 & 43 have been preset at the factory for ProTables
ordered with the “Enhanced Accuracy” option.