Electricity meters are critical revenue assets, and the PMU includes several features to protect against unauthorized access and to maintain an auditable trail:
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(which acquired Elster) and is sometimes available as a free download or via installation media provided by local agents. For newer systems, Honeywell has introduced Elster Metering Systems Power Master Unit Software
Legacy solid-state polyphase meters utilized for demanding commercial and industrial billing.
The Power Master Unit (PMU) is a menu-driven software package designed to support all variants of Elster Metering Systems. It serves as the central programming and data management interface for a wide range of Elster meters, enabling utilities and metering professionals to efficiently configure and retrieve information from metering devices. The software runs as a 32-bit Windows application, providing a familiar graphical user interface (GUI) that resembles other Windows-based applications. Electricity meters are critical revenue assets, and the
Because meter programming directly influences billing data and grid operations, the PMU Software enforces rigid security protocols to prevent tampering:
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One of the primary strengths of the PMU is its compatibility with multiple meter series and its support for diverse communication methods. It can program meters directly via an optical port, through a serial connection, over a modem, or indirectly via a Hand Held Unit (HHU). This flexibility allows the software to be used across various operational scenarios, from simple field programming to complex remote meter management networks.
To download files to a HHU, the operator initiates the transfer from the PMU, which uses HCOM (HUSKY File Transfer Utility) to move the files to the HHU. After a transfer is complete, field personnel can use the HHU to program meters in the field without requiring a direct connection to the PMU. For uploading readings, the PMU supports uploading both .RES and .BUD files from a HHU. The software automatically sets up the meter, Master Unit path, and procedures when performing these operations.
The PMU software supports a wide array of communication media, making it adaptable to virtually any metering deployment scenario. Supported protocols include PSTN or GSM modems, PAKNET, FLAG (IEC 62056-21, formerly IEC 61107), and RS232/RS485 interfaces. The RS232/RS485 applications can be multi-dropped if required, supporting speeds of up to 9600 baud and allowing access to up to 10 meters in a single installation.
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