JEMStar ll IEC High Accuracy Revenue Meter


AMETEK’s JEMStar II has the highest accuracy in the market, provides many communication options and monitors your power quality to make it the ideal choice for any metering application. An impressive color display makes it easy to view power measurements, phasor displays and meter diagnostics. The JEMStar II is easy to use and configure with our intuitive JEMWARE software and the meter display provides a user menu to show and edit configuration details. The JEMStar II has 1 GB of non-volatile memory to store your metering and power quality data for as long as you want. The meter has a single base model that can be used for simple revenue and billing applications as well as more complex power quality monitoring applications.


The JEMStar II’s precision design provides high accuracy with long term stability making it easy to guarantee our 0.05% accuracy for 10 years. Low current accuracy is better than 0.2% RDG at 50 mA. The JEMStar II includes security features that limit access to the meter. Its DLMS protocol not only requires a client ID and password for access to the meter, but also includes three account levels with different permissions. The meter communications are password protected to prevent unauthorized access. Ethernet connections can be restricted to select IP addresses. Audit logs store all access attempts; including meter connection, configuration, firmware changes and data access with username and time/date for each occurrence. The audit log requires permission to view and cannot be modified or deleted from the meter. Alarms are provided when opening the terminal cover and access door. And, for an enhanced alarm system, email notifications can be sent for events such as triggers, battery status, time synchornizations and more. These are fully configurable, with options to send periodically or in live time.


The JEMStar II also offers totalization via digital inputs which allows the user to sum the measurements of several different meters. This process is completed through the connection of digital I/Os of the meters. The user is then allowed to combine the load profile, registers and measurement log of up to 16 meters in any combination.


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Ametek Power

Key Features & Benefits

  • High accuracy – 0.05% guaranteed for 10 years
  • NERC CIPS, WELMEC Compliant – Secure access and audit logs for all access attempts
  • Graphic color display, totalization via digital inputs and remote test mode
  • Advanced communications and alarms
  • Power Quality to IEC 61000-4-30 Class A
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