comemso launches Easy Chester Micro portable tester for AC chargers and ISO 15118-2 communication
Summary
German test-equipment maker comemso has introduced the Easy Chester Micro, a 5.4 kg portable tester that combines AC charging and ISO 15118-2 communication checks with optional safety tests for wall boxes and charging stations. The device simulates a vehicle via Type 1 or Type 2 inlets to help electricians commission, maintain and inspect public charging points as EU AFIR requirements take effect.
German test-equipment maker comemso has launched the Easy Chester Micro, a portable tester that combines charging and communication tests with optional safety tests for AC wall boxes and charging stations.
The device includes an installation tester and an adapter box in one 5.4 kg case, rated IP 66 when closed. Electricians and service teams use it during commissioning, maintenance, periodic inspection and after repairs. A 10.1-inch touchscreen guides them through every step; no laptop or customer vehicle is needed.
The tester simulates the vehicle to IEC 61851-1 and SAE J1772. It measures the Control Pilot (CP) voltage, PWM duty cycle and Proximity Pilot (PP) values through a Type 1 or Type 2 AC inlet, depending on configuration. If a station supports ISO 15118-2, the tester sets up that communication without an external protocol converter. Charging is authorized via External Identification Means (EIM) such as an RFID card or app.
Since January 8, 2026, the EU’s Alternative Fuels Infrastructure Regulation (AFIR) has required new or renovated public charging points to comply with EN ISO 15118-1 to -5. An ISO 15118-2 test with the Easy Chester Micro also checks the station’s powerline communication (PLC) chip and PLC link to the vehicle. The test report records the Signal Level Attenuation Characterization (SLAC) connection setup, its attenuation value and the station’s PLC MAC address.
The tester does not replace a full AFIR conformity assessment. Support for ISO 15118-20 is planned for the first quarter of 2027. TLS-secured charging sessions are not supported. For DC stations, comemso offers the Easy Chester Ultimate.
Optional safety tests to VDE and IEC standards are available for the grid and vehicle sides. They measure insulation resistance at 250 V to 1,000 V and protective-conductor resistance at 200 mA or 25 A, and test residual-current devices at 6 mA to 300 mA. Optional fault simulations check whether the station stops charging after a protective-conductor break, a CP or PP short circuit or a PP break.
“The Easy Chester Micro shows technicians what to connect and what to do next, right on the touchscreen,” said Kiriakos Athanasas, CEO of comemso.
Source: comemso
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