User`s manual

ProScale M150, M250 with LCD Digital Displays Page 11 of 48
Displays
ProScale Model 150 and 250 measuring Systems can operate with any of
several different Displays (sometimes referred to as Digital Readouts). This
manual covers the operation of the General Purpose LCD (Liquid Crystal
Display) Displays. Other available Displays are mentioned in this section,
and other data acquisition accessories are mentioned in Section 6 of this
manual. For more information about the available Displays for ProScale
Model 150 and 250 Measuring Systems please visit:
http://www.proscale.com/displays/displays.htm
Measurement Compensation Option
This is Accuracy Enhancement software (firmware) available on General
Purpose Battery and 24VDC Surface Mount Displays and General Purpose
Battery and 24VDC Panel Mount Displays. This firmware option provides
increased accuracy of measurements by utilizing linear interpolation
calculations in the ProScale Display. The process incorporates an error
correction table that “maps” the physical scale measurements to a set of
known accuracy table entries. Use of this feature can enhance the
measuring accuracy of a ProScale measurement system.
The compensation system is designed to be simple for the user to recalibrate
in the field. Recalibration requires a set of measurement standards whose
accumulated length is approximately that of the ProScale measuring system
question. These measurement standards must be in multiples of a common
length. Examples would be 5”, 10”, 15”, 20”, etc. A 5”, 10” and numerous
20” standards would be adequate to accommodate most ProScale lengths.
The firmware accommodates a maximum of 32 correction table entries.
Using a 5” measurement standard multiple would yield a total compensation
range of 160” or 13.3 feet (4.064 m). Smaller standards equal higher
accuracy correction but less range. Longer standards equal longer range but
lower accuracy correction.
ProScale display units that support the compensation feature have a “C” at
the end of the firmware revision displayed on power-up or when ON/OFF key
is pressed.
See Section 3: COMPENSATION CALIBRATION for additional information.