comemso electronics GmbH has introduced Easy Chester Ultimate, a mobile system for EVSE testing. The new platform combines several charging infrastructure tests within one portable device.
Easy Chester Ultimate supports AC, DC CCS, and CHAdeMO charging stations. It also analyzes charging communication and checks electrical safety on both connection sides. The system targets commissioning, maintenance, repair, and periodic inspection activities. Technicians can use it directly at charging stations during different lifecycle stages.
Previously, these tasks often required several test instruments and separate operating procedures. They also involved different documentation processes for electrical and communication results. Easy Chester Ultimate brings those activities into one structured testing environment. An integrated 10.1-inch touchscreen guides users through each selected procedure.
The system combines measurements, communication sequences, and results within one report. Users can create configurable PDF test reports for completed testing activities. Despite its expanded functions, the system weighs 15.7 kilograms. Comemso says this makes it significantly lighter than its predecessor.
Dr.-Ing. Kiriakos Athanasas, CEO of comemso electronics GmbH, explained the product’s design approach. He said the system combines charging standards with a user-focused testing experience.
Three EVSE Testing Levels
Reliable charging station evaluation requires more than a successful charging session. A station may communicate correctly while still presenting an electrical safety problem. Conversely, a station may be installed correctly but fail during operation. It may not start or stop charging sessions consistently.
For this reason, Easy Chester Ultimate examines three different testing areas. These include functionality, communication, and electrical safety.
Functional and Communication Testing
Depending on configuration, the system supports functional tests for AC, CCS, and CHAdeMO stations. It also checks the Control Pilot and Proximity Pilot signals.
The system can also test Power Line Communication. This includes the Signal Level Attenuation Characterization process, commonly known as SLAC.
Digital charging communication can be analyzed under several recognized standards. These include DIN 70121, ISO 15118-2, and ISO 15118-3.
The system therefore examines communication between the charging station and simulated vehicle. It can help technicians analyze charging session behavior and communication sequences.
Electrical Safety Testing
Electrical safety testing covers the grid side and vehicle-facing interface. This allows technicians to examine different parts of the charging station connection. Depending on configuration and test direction, the system supports several safety measurements. These include protective conductor resistance and insulation resistance.
It can also test residual voltage and residual current devices. Insulation monitoring and loop impedance measurements are included as well. Easy Chester Ultimate can simulate defined faults on CP, PP, and PE lines. These simulations allow technicians to examine how the charging station responds.
The system also verifies the station’s response to insulation faults. This helps assess whether relevant protection functions operate during abnormal conditions. Voltage and current measurements complete the main electrical test functions. Together, these tests provide a broader assessment of charging station performance.
Guided Testing and Documentation
Easy Chester Ultimate uses a 10.1-inch integrated touchscreen. The display guides technicians through each selected test process. Status indicators show which test is currently active. Measurement values and instructions appear within the same operating interface.
This guided approach helps technicians follow consistent procedures. It can also make individual results easier to interpret.
The testing process follows four structured stages:
- Connect the system to the charging station and grid side.
- Select the charging standard and required test process.
- Perform safety, functional, and communication tests.
- Analyze deviations and document the completed results.
This sequence creates a clear link between testing steps and final conclusions. It also supports repeatable testing across different charging stations.
Configurable PDF Reports
The system transfers measurements and test results automatically into PDF reports. Communication sequences can also be included within the shared documentation process. Users can configure the report according to their documentation requirements. This helps combine different test categories within one record.
The system evaluates individual test steps as “Passed” or “Failed.” These assessments apply only to the tests performed during the selected procedure. This distinction helps technicians identify specific deviations. A station could pass communication testing while failing an electrical safety measurement.
Reports can be sent by email directly from the system. This reduces separate documentation steps after completing field work. Wireless firmware updates support continued system maintenance. Integrated device checks provide additional support during field operation. Optional remote support can also assist users during selected service activities. These features aim to simplify use outside laboratory environments.
Applications Throughout the Charging Lifecycle
Easy Chester Ultimate supports several teams working with charging infrastructure. These include installation, maintenance, repair, testing, and inspection teams. The system can be used during the initial commissioning of charging points. Technicians can check performance before equipment enters regular operation.
It can also support functional testing after maintenance or repair work. This helps verify whether corrective actions resolved the original problem. Charging and communication problems represent another key application. Technicians can use functional and communication tests to investigate session failures.
The system also verifies electrical protection functions. These checks can help identify deviations affecting safe charging operation. Periodic inspections form another intended use. Operators and service teams can repeat selected procedures throughout the station’s operational life.
Testing may also follow firmware or configuration changes. Such changes can influence communication, charging behavior, or protection responses.
Identifying the Source of a Deviation
A charging problem may originate from several different areas. The cause could involve the electrical installation, communication system, protection functions, or station behavior. Easy Chester Ultimate combines tests that address each of these areas. This allows technicians to compare results within one testing process.
The approach can help determine whether a fault involves the grid side. It can also indicate whether the issue appears at the vehicle-facing interface. Communication analysis provides another diagnostic perspective. It shows whether the charging station and simulated vehicle exchange information correctly.
Functional testing then examines the station’s general charging behavior. These combined results can support a more focused maintenance response.
International Standards and Flexible Configurations
Easy Chester Ultimate supports various charging interfaces, depending on configuration. Supported AC connections include Type 1 and Type 2.
The system can also support CCS Combo 1 and CCS Combo 2. NACS support is available according to SAE J3400.
CHAdeMO is another supported charging interface. This gives the system coverage across several important charging standards.
The supported standards and protocols include IEC 61851-1 and DIN 70121. ISO 15118-2 and ISO 15118-3 are also included.
The selected system configuration determines the available interfaces and protocols. Customers can therefore match the tester with their required charging applications.
Optional Long-Duration Testing
Easy Chester Ultimate supports optional extensions for additional applications. A Long Duration Unit enables longer charging cycles. Longer tests can help technicians examine time-dependent faults. These faults may not appear during short charging sessions.
External DC loads provide another available extension. They support higher-power testing over longer periods. These options expand the system’s use beyond short functional checks. They can support investigations requiring extended charging operation.
The announcement does not specify one fixed configuration for every customer. Instead, available functions depend on the selected system setup.
Ten Years of Easy Chester
The Easy Chester product family has been available since 2016. Since then, it has supported charging infrastructure testing worldwide. Its users include manufacturers, operators, installers, testing organizations, and service technicians. These groups use the product family for testing and troubleshooting applications.
The platform has supported work across the charging station lifecycle. That lifecycle includes installation, commissioning, service, repair, and inspection. Easy Chester Ultimate represents the next development stage for the product family. It combines a broader testing scope with a lighter mobile design.
The system also adds systematic user guidance and integrated documentation. These changes address both technical testing requirements and field usability.
Designed for Field Testing
Charging infrastructure continues to require repeatable testing procedures. Technicians need clear results when commissioning or servicing charging stations. They also need to distinguish electrical problems from communication problems. A single charging failure can involve multiple technical systems.
Easy Chester Ultimate addresses this challenge through a combined testing workflow. It brings functional, communication, and electrical safety checks into one system. The mobile design supports direct testing at the charging station. Its 15.7-kilogram weight can make transport easier than previous equipment designs.
The touchscreen provides a consistent operating method for different test procedures. The configurable PDF report then preserves the results in one document. This combination is intended to simplify field testing and documentation. It can also help teams document results across inspections and service visits.
Comemso develops measurement and test systems for electric mobility applications. Its portfolio covers battery management systems, electric vehicles, and EV charging infrastructure. Comemso supports vehicle and charging station manufacturers worldwide. Its customers also include testing organizations, operators, and service teams.
Easy Chester Ultimate extends that testing focus through an integrated mobile system. It gives field teams one system for examining charging behavior, communication, and safety.
Product demonstrations and system configurations are available from comemso electronics GmbH. A product video shows Easy Chester Ultimate during its guided testing process.
Sources: comemso (via email)
