Structure of present data retrieval system

During the present state of GAW DAQUAS the system for retrieval of data and system control consists of the following operating components:

Graphical front end, written completely in Java for user control of all activities and performances of the whole system:

This front end collects all user relevant output from the control program and all other user relevant input to the other part of the station data quality system as there are: Station Book, Backup System, Eval: Isave Program for data evaluation and quality control, Report Generator and Help functions. In normal operation mode during operational real time measurement the first Window upper left is the main control panel which always is opened. It shows all active measurement devices, the measured gases, their one minute average values of automatically calculated concentrations and their raw values and the measurement units. In case the user wants to see a graphical display of measured time series and occasionally a list of all measurement parameters which have been measured at the same time an additional list with all measurement parameters can be opened; -- see table at lower right In case some underflow of values happens some small signalling window opens with a short memo. Additionally al list of protocols of interactions of the system can be displayed and controlled by the user (right side up).

Control Program for data retrieval, instrument control and online quality assurance support. This java program controls the ADAM process computer system for analog retrieval of data and control of automated calibration and zero air control via relays and magnetic valves. It performs digital data retrieval presently from all Thermo Environmental system instruments. It also is responsible for database input and online quality control procedures as over- and underflow control of measured values and instrument parameters, automatic calibration calculation and control cards for example. These concentration levels are determined for operational purposes in order to enable the measurement crew to right in time corrections of measurements under operation. Furthermore this database and measurement control program contains methods for automated quality assurance as control cards and signalling override or underflow of threshold values.

Database for RAW data on order to contain raw data and related instrument parameters as also automatic calibration results in order to give the measurement staff in advance control possibilities about actually measured concentration levels. The database was realised in the SAP-DB database system which is available for free via internet.

Database for Meta data, also called station book or log book for input of all practical activities at the measurement station which can affect measurements and data quality. A prototype of this database originally was designed with ACCESS. Now this database also is going to be realized with SAP-DB system. Each note in this station book consists of a date and time for start and a duration and an index for measurement instrument and measured effect.

In order to receive more information please read the file about user requirements in the following link.: