Power quality monitoring
The program MEgA_Explorer [3] allows the display and detailed analysis of data from the local SQLite database. It is a Windows application installed on a PC or server. It is mainly focused on the detailed analysis of data from a single measurement, but also supports selected bulk functions (e.g. measurement reports).
The web application WebDator2 [4] allows multiple access for data display. It is mainly focused on large groups of instruments, for overview and informative evaluations and summary analyses. The application works over a PostgreSQL or Oracle database.
Continuous remote automatic data reading of one, but especially multiple instruments available on the network, including monitoring of input states is performed by the MEgA_Merci Multi system [5], which works as a Windows OS service on the server.
Periodic data reading is performed at a set interval, usually daily. The system reads newly measured data since the previous reading. The read data is stored in a SQLite, PostgreSQL or ORACLE database. The program also performs automatic exports in CSV format and reports on voltage quality in the form of emails. The program can be used to remotely update the DSP processor core FW after checking the transfer.
With the exception of the WebDatOr2 program, the mentioned programs, including their manuals, are available at http://www.e-mega.cz/DL/
The MEg39.1 PQ monitor also enables work with third-party SW through the MODBUS RTU (RS-485), MODBUS TCP (Ethernet), ČSN EN 60870-5-104 and DLMS/ COSEM protocols. It is possible to set up automatic sending of measured values via the ČSN EN 60870-5-104 protocol according to deviation criteria or at regular intervals.
For presentation in other systems, CSV formats can be used, which can be customized.
The instrument has web interfaces enabling displaying actual values of selected variables over a web browser.
