Atlas Data Processing
Processing on Demand
Atlas always stores raw (unprocessed) readings in the project database. When it receives a request for data, Atlas processes readings on the fly. This ensures that any corrections to calibration factors, processing methods, or data values are always included in the results that Atlas presents. Atlas performs the same on-the-fly calculations when it first imports the readings. This allows Atlas to scan for alarm conditions.
The Sensor Table
Each project contains a sensor table that lists all the sensors in the project, their serial numbers, calibration factors, and much more. Since all of this information is collected in one table, it is easy to make additions, corrections, and changes. The sensor table also eliminates the problem of lost calibration sheets.
The screen shot above shows a few rows and columns of the sensor table. The serial number, calibration factors, and formula are usually obtained from the sensor calibration sheet or sensor manual. For efficiency in entering a large number of sensors, sensor entries can be copied and then modified as appropriate.
Conversions and Calculations
Atlas uses the calibration factors and expressions in the sensor table to convert raw readings to data in engineering units. Expressions can reference datum readings and also readings from other sensors. This allows Atlas to calculate changes or correct for temperature or atmospheric pressure. It also allows for the cumulative calculations required for beam sensors or in-place inclinometers.