This archive article describes the configurations presented at publication. Use the current Calimera product page to plan a setup for your measurement task.
View original publicationEasy Chester Calimera. Mobile EVSE calibration
Use the mobile, scalable Easy Chester Calimera setup to compare a charging station’s energy measurement with a reference. EVSE stands for electric vehicle supply equipment, or charging station.
Voltage, current and power for the calibration task
Plan the calibration setup for the voltage and current you need. The configurations described here cover 150 V to 1000 V DC, 0 A to 500 A or more, and 40 kW, 130 kW or 260 kW. For 400 V and 800 V charging systems, select the required voltage/current combination and holding time within the chosen configuration.
Resistive loads provide stable, repeatable measurement conditions for calibration.
Charging interfaces and standards
The configurations described in this article support the following charging interfaces and communication standards:
- CCS (DIN 70121, ISO 15118-2, ISO 15118-3)
- CHAdeMO (Versions 0.9 – 2.0)
- NACS (SAE J3400)
- AC Testing (IEC 61851-1 & SAE J1772, up to 32 A 3 phases or 80 A one phase)
Mobile calibration at the charging site
Bring the calibration setup to the installed EVSE:
- Independent power supply. Integrated battery and solar options support up to 8 hours of autonomous operation.
- Transport by van or trailer. Mount the system for travelling between charging stations and calibrating several sites in one day.
- Quick setup and service. Modular components simplify service and reduce interruptions.
Cooling and protection for field operation
Plan field use around the system’s cooling and protection:
- Cooling for repeatable measurements under high load.
- IP21 (active) and IP65 (inactive) protection for operation in challenging conditions (0°C – 40°C).
A modular system for calibration in the field
Developed in Germany, the modular Easy Chester Calimera has been in use since 2016.
Configure tests and record results with comframe
Use comframe to configure the test, monitor the measurements and save the results:
- Real-time monitoring of voltage and current
- Configure the required test points
- Record events and diagnostics automatically
- Document measurements for reporting in ISO 9001 and ISO 17025 workflows.
Keep conditions, measurements and results together in the calibration report for traceability.
Plan calibration against OIML G22, NIST HB-44 and German calibration law
EVSE Calibration
Plan the required calibration and legal-metrology tests with the applicable procedure and authorized scope. Match the system configuration to the test points. This article refers to the following documents:
- VDE-AR-E 2418-3-100, REA Document 6-A and IEC 62053-41 for German Eichrecht. Cross-testing at V(min)/I(max) and V(max)/I(min).
- OIML G22 with focus of 400 V and 800 V voltage bands
- NIST Handbooks HB-130 and HB-44 for “any voltage” with focus of voltage bands
Use comframe to select the required test points and run them automatically in the field.
Plan your EVSE calibration task.
Discuss operating points and reporting requirements with comemso application engineering.
Calimera approval by the German National Metrology Institute (PTB)
Calimera in field and laboratory use
Easy Chester Calimera. EVSE calibration in the field
Easy Chester Calimera. EVSE testing in the lab
Calimera in service and production
Service and production workflows
- Field service: calibrate charging stations after installation, during maintenance, after repairs and at the required intervals.
- Production: integrate calibration into the automated end-of-line workflow.
- Calibration and compliance: plan German Eichrecht and OIML G 22 (International Organisation of Legal Metrology) tests for billing accuracy. Apply ISO 17025 to the calibration laboratory and its accredited scope.
Repeatable measurement conditions
- Run long-duration EV simulation and charging-station calibration under repeatable conditions. Assess measurement accuracy using the selected reference and procedure.
Plan high-power calibration points
- Plan DC-CCS, CHAdeMO, NACS and high-power charging tests up to 1000 V and 500 A with Easy Chester Calimera. For 400 V and 800 V charging technology, match the required voltage, current, charging power and holding time to the chosen configuration.