The AMETEK Power Instruments’ JEMStar II High‑Accuracy Revenue Meter is your cash register. The JEMStar II delivers exceptional precision and long‑term stability making it easy to guarantee 0.05% accuracy for 10 years. Compared with other meters the JEMStar II Revenue Meter can recover more than $13,000 per meter per year in unaccounted revenue.
As a versatile energy Meter, the JEMStar II combines revenue‑grade measurement with advanced power and power quality monitoring supporting everything from simple billing applications to complex system diagnostics at critical points of the electrical network.
METER APPLICATIONS:
With a wide range of configuration options, the JEMStar II can be deployed for:
- Revenue metering and billing
- Utility interchanges and settlements
- Generation and load monitoring
- Power quality analysis at points of common coupling
- System diagnostics and regulatory compliance
This JEMStar II supports both straightforward energy measurement and advanced power quality monitoring, making it ideal for transmission distribution and industrial environments. The meter supports up to seven communication ports including an optional internal 4G LTE cell modem, allowing seamless data access for operators, utilities and authorized third parties.
CONFIGURATION:
The JEMWARE Configuration Software provides powerful yet intuitive tools for configuring the JEMStar II and visualizing energy and power quality data. Most users can learn the basics of configuring the Energy Meter in under an hour and with a full day of training, gain the expertise necessary to build custom configurations.
The meter is available in socket switchboard A‑base and multiple retrofit packages offering true plug‑and‑play replacement of legacy meters with minimal installation effort.
FEATURES AND BENEFITS:
- High‑Accuracy Revenue Meter performance – 0.05% accuracy for 10 years
- NERC CIP compliant with secure access and full audit logs
- 1 GB non‑volatile memory for long‑term metering and power quality data storage
- Graphic color display with totalization via digital inputs and remote test mode
- Advanced communications and alarms
- Six‑channel digital input/output and four‑channel analog input/output
- Flexible design for easy replacement of legacy meters
- CAISO, ERCOT and NYPSC approved
EASE OF USE:
Using JEMWARE software the Energy Meter can be placed into remote test mode accessible directly through the meter display or controlled through user permissions. The JEMStar II also supports totalization via digital inputs enabling users to sum measurements from multiple meters. By interconnecting digital I/Os, operators can combine load profiles, registers and measurement logs from up to 16 meters in any configuration.
SECURITY:
Security is built directly into the JEMStar II Revenue Meter through DLMS protocol support. Access to the meter requires authentication and provides three account levels:
- Read‑only access
- Read and set date and time with approved password
- Full access to all DLMS objects and logs with approved password
This layered security structure ensures data integrity for revenue metering regulatory compliance and auditability.
COMMUNICATIONS:
The JEMStar II supports up to seven communication ports with real‑time visualization of port status via a graphical heads‑up display. This display clearly shows installed ports configuration status and any required user attention.
Key communication capabilities include:
- Two independent Ethernet ports with separate IP addresses
- Simultaneous multi‑user, multi‑protocol operation
- Secure third‑party access without compromising internal networks
- Internal 4G LTE cellular modem supporting up to eight simultaneous protocol connections
These features make the JEMStar II an ideal Revenue Meter and Energy Meter for modern connected grid and IoT‑enabled environments.
REAL-TIME SITE MONITORING AND NOTIFICATIONS:
The JEMStar II continuously monitors site conditions for outages, power quality anomalies and operational changes. Real‑time alarms are delivered via web‑based JSON messages enabling direct integration with cloud‑based applications.
Additional monitoring features include:
- On‑meter wiring verification with color phasor diagrams
- Automatic alerts for mis‑wiring or phase angle violations
- Remote phasor viewing through JEMWARE software
- Configurable email notifications for triggers, battery status, time synchronization and more
POWER QUALITY MONITORING:
As both a High‑Accuracy Revenue Meter and advanced Energy Meter the JEMStar II includes comprehensive power quality monitoring:
- Sag swell and outage recording standard
- High‑speed RMS and waveform capture for detailed event analysis
- Continuous harmonic and flicker measurements
- 400‑channel power quality log with months of onboard storage
Power quality data is stored in PQDIF format and exported automatically for analysis using JEMWARE or third‑party applications.
POWER QUALITY RECORDINGS:
Sag/Swell/Outage (Standard)
- Record Event, Time, Date and Duration
- Record phase that triggered
- Min/Max/Avg V,A,Pf, THD
High‑Speed RMS (Optional)
- Record voltage and current per phase
- 120 Hz recording rate
- Configurable pre‑ and post‑trigger recording, max 60 second recording per event
Waveform Capture (Optional)
- Record voltage and current phase
- 16 Samples/Cycle Recording Rate: Max 960 cycles recording per event
- 128 Samples/Cycle Recording Rate: Max 240 cycles recording per event
- 512 Samples/Cycle Recording Rate: Max 30 cycles recording per event
- Configurable pre‑ and post‑trigger recording
Harmonic Recording (Optional)
- Record individual voltage and current harmonic per phase up to the 64th
- Record magnitude and phase angle
Flicker Measurement (Optional)
- Pst and Plt
- Instantaneous Pinst
RETROFITTING:
The JEMStar II is engineered to retrofit directly into existing legacy meter enclosures, short or tall, using existing wiring for true plug‑and‑play replacement. This reduces installation time, eliminates redesign work and can save more than $1,000 per meter when compared to new installations.
Compatible retrofit platforms include:
- SCI JEM2, JEM10 and JEMStar
- GE DS63, DSW63, DS64 and DSW64
- Quantum Q121 and Q220
- TransData MarkV
- L&G Quad4 Short or Tall
- Westinghouse D2B and D4B
To learn more about our retrofit options, download our brochure or contact us to discuss your needs.