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Easy Chester Calimera. Mobile EVSE metrology

AC and DC EVSE Calibration System – Easy Chester Calimera

Easy Chester Calimera is a mobile calibration system for the energy measurement of AC and DC charging stations. Compare the energy recorded by the station with a calibrated reference while applying a controlled real load. Repeat defined operating points and document the conditions and deviations. AC and DC coverage depends on the selected configuration.

Configure Easy Chester Calimera Review the calibration workflow
Mobile Easy Chester Calimera calibration laboratory connected to an EV charging station
Known counterpartTest without a customer vehicle
Guided workflowRepeatable checks for technicians
Defined boundaryFunction, safety or metrology by product
Documented resultKeep the inspected-unit record

Product role

What is Easy Chester Calimera?

Easy Chester Calimera is the mobile calibration product within the Easy Chester platform. It is built for organisations that must compare the energy measured by an installed charging station with a traceable reference value under defined charging conditions.

A standalone power meter does not create the required charging event. Calimera adds the EV-side charging behaviour, communication, load, cooling, test-point control, synchronised acquisition and report around the reference instrument.

Installed EVSE

Measure the charger where it operates instead of removing infrastructure designed to remain in the field.

Defined operating point

Apply controlled voltage, current and duration instead of relying on an uncontrolled vehicle state.

Traceable comparison

Keep reference value and charger value attributable to the same charging event.

Structured evidence

Connect configuration, measurement data, identifiers and result in one reportable workflow.

Easy Chester Calimera vehicle operating at an installed high-power charging station
Mobile calibration deployment at the installed charging infrastructure.

Controlled execution

Calibration workflows should be simple, repeatable and attributable

The workflow keeps the charger identity, selected interface, reference chain, operating point, measured values and final result connected from preparation to report.

  1. Identify

    Register EVSE, connector, meter and site information.

  2. Configure

    Select interface, test points, load mode and reference equipment.

  3. Connect

    Establish the charging session with controlled EV-side behaviour.

  4. Stabilize

    Reach and hold the required voltage and current point.

  5. Compare

    Acquire reference and EVSE meter values for the same interval.

  6. Report

    Document configuration, values, deviations and result.

Keep the EVSE identity, operating point, reference readings and result linked in one calibration record.

Configure the test. Do not develop the test environment. Released test points, measurement logic and report structure turn recurring calibration work into a controlled operational process.

Controlled real-load verification

Use real energy transfer when the measurement itself is under test

Real-load verification compares the station and reference measurement during the same physical energy transfer at a defined operating point. It keeps charging communication, the installed current path and thermal behaviour inside one repeatable test event. Specialised meter-circuit methods remain a procedure-specific option, not the central Calimera product promise.

Charging event

Real EV-side communication

The charging station follows the actual low-level and high-level sequence required by the selected interface.

Electrical event

Real voltage and current

The reference meter and EVSE meter observe the same physical energy transfer.

Operating point

Stable load and duration

The configured load and cooling concept hold the measurement point long enough for the required evaluation.

Reference

Traceable AC or DC power meter

The approved meter provides the reference value and uncertainty context for the calibration chain.

DUT

Installed charger meter

The EVSE value remains linked to charger identity, firmware, connector and test point.

Evidence

One event, two measured values

The result is based on synchronised acquisition rather than manually merging unrelated measurements.

Mobile laboratory architectures

From a compact service vehicle to a complete mobile calibration laboratory

The mobile platform is selected by charger portfolio, power, payload, cooling, local metrology framework and the operating model of the calibration organisation.

Easy Chester Calimera high-power laboratory integrated into a European service van
Europe and Asia

Compact high-power van class

One integrated vehicle class for mobile AC and DC calibration with load, cooling, reference measurement and operator workspace.

  • Built around the target CCS, CHAdeMO, NACS or AC portfolio
  • Standard and Boost operating modes by released configuration
  • Power supply, ventilation, payload and cable routing engineered as one system
Easy Chester Calimera USA and NIST pickup-truck configuration
North America

USA and NIST pickup-truck class

A dedicated mobile configuration for North American field deployment and NIST-related metrology workflows.

  • Vehicle and payload concept adapted to regional operation
  • NIST Handbook 44 and Handbook 130 context by approved project scope
  • Connector, load and reference equipment selected for the target market
Rear access to the Calimera mobile laboratory
Left-side access to the Calimera mobile laboratory
Front three-quarter view of the Calimera service van
Easy Chester Calimera connected to an EV charging station

Load and cooling strategy

Standard mode for sustainable test points. Boost mode for short high-current points.

Calimera now uses one compact high-power system class for Europe and Asia. The operating mode is selected by the required current and holding time instead of creating multiple overlapping hardware classes.

Easy Chester Calimera compact load and cooling systems
Standard mode

Recurring calibration points

Approximately 30 to 60 minutes

Designed for stable and repeatable operating points across routine calibration tasks. Final duration depends on voltage, current, ambient conditions and cooling.

Boost mode

High-current calibration points

Up to 3 minutes

Provides short high-current operating points when the procedure requires more current than the sustainable Standard mode range.

Published DC voltage context150 V to 1,000 V DC
Published current contextUp to 500 A in reference scope
Published examples40, 130 and 260 kW configurations

Published values are reference examples, not universal simultaneous or continuous limits. The released quotation defines voltage, current, power, duration, cooling and safety limits.

Keep the entire measurement chain attributable.

Link the identified EVSE, charging interface, load and cooling, calibrated reference meter and software record to the same test point. Retain the operating conditions, timestamps, values and diagnostics in the report.

Calibration capability, laboratory accreditation and legal recognition are separate statements. The approved laboratory scope and market procedure remain authoritative.

Open measurement integration

Integrate precision power meters through open, documented interfaces

Metrology institutes and calibration organisations often already operate approved reference instruments. Calimera is designed to integrate the selected power meter into the same controlled workflow rather than forcing one universal meter choice.

Preserve the approved chain

Use the reference equipment selected by the laboratory and its uncertainty budget.

Automate acquisition

Bring meter values into the same test-point and report context as the charging station.

Avoid manual transfer

Reduce transcription, timestamp and attribution errors between independent tools.

Keep the system extensible

Add further instruments when an open and maintainable interface is available.

Standards and legal-metrology context

Configure the metrology framework for the target market

Calimera supplies the technical measurement workflow. The approved procedure, reference chain, uncertainty, authority requirements and legal recognition remain market-specific.

Laboratory competence

ISO/IEC 17025

ISO/IEC 17025 applies to the calibration laboratory and its accredited scope, not generically to the hardware.

International framework

OIML G 22

Relevant metrological guidance for electric vehicle supply equipment, applied by approved edition and project scope.

Germany

Eichrecht and VDE context

  • VDE-AR-E 2418-3-100
  • REA Document 6-A
  • IEC 62053-41
  • VDE/GMP 6.8
North America

NIST context

  • NIST Handbook 44
  • NIST Handbook 130
  • Project-specific state and authority requirements
Metrology context for Easy Chester Calimera including ISO IEC 17025, OIML G 22, German Eichrecht and NIST
Regulatory context illustration. Procedure, measurement range, uncertainty, reference traceability and accredited scope must be confirmed for the specific service and jurisdiction. This is not a product approval or calibration certificate.

No single product configuration, report or accreditation statement automatically satisfies every national procedure. The released system scope and the responsible authority or laboratory decision remain decisive.

Deployment engineering

Choose the mobile platform around access, payload and operating environment

The vehicle is part of the measurement system. Load modules, cooling, ventilation, supply, cable routing, mass distribution, operator access and protection must be engineered together.

Calimera can be used as a mobile service system, an integrated van or pickup laboratory, a trailer solution, or a controlled stationary laboratory setup.

MobilityCase, van, pickup, trailer or laboratory
SupplySite power and project-specific autonomous options
EnvironmentVentilation, cooling, protection and safe operation
Read the CMI field story
Rear view of the integrated Easy Chester Calimera mobile laboratory

Software and reporting

The software keeps measurement, test program and report in one controlled workflow

Calimera links the active test point to live voltage and current values, reference and EVSE data, identifiers, diagnostics and the final calibration record.

Guided setup

Prepare interface, meter, load mode and target operating points.

Synchronised acquisition

Record reference and charger values for the same interval.

Diagnostics and events

Retain charging communication, statuses and relevant deviations.

Structured report

Generate an attributable result package for the approved workflow.

Calimera configuration and synchronized voltage and current measurements displayed on a notebook
comemso comframe UI – Calimera calibration campaign, shown in the comemso webinar. Configured operating points and measured voltage/current remain linked to the test record.

One method for field, laboratory and production.

Use the controlled measurement chain for scheduled field calibration, checks after service work and laboratory procedure development. Mobile institutes can bring it to installed infrastructure; production configurations combine the Calimera GUI and a suitable AC or DC power meter with Easy Chester EOL or EOL HPC.

Configure the complete system

Build the EVSE calibration system around the approved measurement task

Calimera is not one fixed bill of materials. The useful configuration starts with the charger portfolio, operating points, metrology framework and evidence requirement.

Charging technologyCCS1, CCS2, CHAdeMO, NACS, Type 1 or Type 2.
Electrical scopeVoltage, current, power, Standard mode and Boost mode.
Reference chainPower meter, calibration status, interface and uncertainty.
MobilityCase, van, pickup, trailer or stationary laboratory.
Market frameworkISO/IEC 17025, OIML, Eichrecht, VDE or NIST context.
EvidenceIdentifiers, data, reports, approvals and traceability.
Define the Calimera configuration

Configure the complete calibration chain, not only the headline power

  1. Charging technology

  2. Operating range

  3. Metrology scope

  4. Load + cooling

  5. Mobility

  6. Evidence

Frequently asked questions

Easy Chester Calimera FAQ

The released quotation, calibration scope and market approval remain authoritative for the final system.

Why use a controlled load instead of a vehicle?

Calimera uses controlled real load and reference measurement to make selected operating points repeatable within its configured range. A vehicle follows its battery state, temperature and charging curve, so a vehicle and adapter cannot freely reproduce every voltage/current point needed for a complete metrological test.

The PTB presentation explains this limitation and states: “Benötigen ein voll-ausgestattetes Labor an der Ladeeinrichtung”. .

The permitted method depends on the task: calibration, formal verification (Eichung) and an in-service investigation (Befundprüfung) have different purposes. GM-P 6.8 includes procedure-specific vehicle use for a Befundprüfung; this is not a universal ban on vehicle-based checks. The applicable procedure determines the required test points and any permitted exceptions.

What is Easy Chester Calimera?

It is a mobile EVSE calibration system for traceable on-site calibration and metrological verification of installed AC and DC charging infrastructure.

Why calibrate a charging station on site?

The charger remains in its real electrical, thermal and operational environment. The complete measurement chain is brought to the place where energy is delivered.

Which charging technologies can be supported?

Published configurations cover CCS1, CCS2, CHAdeMO, NACS, AC Type 1 and AC Type 2. Exact connectors and protocol versions depend on the released system.

What is the difference between Standard and Boost mode?

Standard mode is intended for sustainable operating points held for approximately 30 to 60 minutes. Boost mode supports short high-current points for up to 3 minutes. Final values depend on configuration and conditions.

What is the published DC operating context?

The published reference information cites 150 V to 1,000 V DC, up to 500 A in reference scope, and example 40, 130 and 260 kW configurations. These are not universal simultaneous or continuous limits.

Can Calimera cover 400 V and 800 V charging systems?

Yes. The published voltage range is intended to cover typical 400 V and 800 V charging technology. Required current, power and holding time must be specified separately.

Field workflow planning

Choose the tool from the service question.

Describe the installed EVSE, required check, site conditions and result format.

Configure your test systemContact application engineering

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Easy Chester product roles

Choose Calimera when the energy measurement is the decision

The Easy Chester platform separates calibration, commissioning, production and high-power production because each task needs different evidence.

Mobile calibration

Calimera

Traceable reference comparison, controlled operating points and a calibration record.

 Field assurance

Ultimate

Commissioning, safety, function, service, repair and periodic inspection.

 Production

EOL

Repeatable end-of-line function, communication and parameter verification.

 High-power production

EOL HPC

High-power production cells with load, cooling, safety logic and traceability.

EVSE calibration knowledge

Plan the measurement scope for real-load verification.

Understand the controlled load, operating points and measurement chain needed for a repeatable EVSE calibration and verification workflow.

Read the method comparison →