Energy Meter Verification Test Manual

This instruction is for use by Notified Bodies of the MID Directive 2014/32/EU, and
other energy meter testing laboratories.


Energy meter parameters

Parameter Value

MID Class B

Harmonized Standard

EN 50470 -1, - 3

MID certificate


Notified Body

NMi Certin (0122)

Rated Voltage

3 x 230/400 V

Rated Current

0.25-5 (32) A

Optical Test Output ( must be activated in the app)

10000 imp/kWh



Reading MID software version

MID software version can be read from the display in two ways: 

  • Plug in a Type 2 cable, immediately removing and inserting again (with no car connected)


  • Reset the charger. This can be done in the app (requires PIN code) or by turning the power off/on 

Testing integrated energy meter 


(Charging) installation – a collection of charging points on one top-level circuit,
possibly with sub-circuits, managed under one administrator.


Simple testing of the integrated energy meter’s accuracy is best done in the field.
This allows for a quick test without needing to install and configure a replacement
charger while a unit is being sent for testing.

To test in the field, commercially available equipment is available which is
specialized for metering the energy delivered by a Type 2 socket, an example being the MTE eMOB I-32.3 AC.

Alternatively, a custom-made Type 2 cable can be combined with a generic portable reference
standard. We recommend using a car as the load, but a resistive load can also be used if a car simulator is available for controlling the charging cycle. The delivered energy to the load can then be measured with the portable reference standard.

The status indicator LED ring doubles as a pulse output and needs to be set into “Field test mode,” see the next section for instructions.


Note! For more thorough testing in a lab using an isolated source, please contact
Zaptec Support to deactivate the residual current detection function temporarily.

Requirements for in-situ testing

  • Electric car with 3-phase capable (if relevant) onboard charger
  • Portable reference standard
  • Type 2 cable assembly with ability to connect to reference standard voltage
    and current inputs
  • Phone with Zaptec app installed, Android or iOS
  • If the installation has active user authentication, cooperation with the installation
    owner or charging point owner will be required for the charging point to
    provide energy 

How to test Field test mode

  1. Open the Zaptec app and log in with your Zaptec account

  2. From Home screen, tap the 3_dots_.pngicon at the top-right

  3. Select “Configure products" and connect, via Bluetooth, the correct charger with PIN code.
    Be sure to be in close vicinity of the charger

  4. Under "Advanced settings", activate the "Field test mode" toggle-switch and press
    “Save” icon
  5. The LED ring of the device under test should no longer be lit, indicating it is
    ready to provide energy pulses

  6. Connect load for the desired time. After disconnecting load, return to the app and deactivate the "Field test mode" toggle-switch. Remember to press the “Save” icon.
             a.  Field test mode will automatically deactivate in 4 hours 
             b.  Powering the charger off/on will also return the LED light ring to its normal mode
                  of operation.

Note! If directly connecting to a charging vehicle, ensure reference standard can
withstand at least 32A continuous current

For assistance with testing the energy meter 👉 go to 


Laboratory testing

In addition to reconfiguring the LED ring as for the field test, the following modifications are required on units submitted for test at laboratories:

  • The residual current circuit breaker is disabled. This enables Zaptec Pro to be tested with isolated current loops.
  • The safety relay closes automatically, without the need of a Control Pilot signal, which is normally required for operation.

With these modifications, Zaptec Pro can be tested as a conventional energy meter, where the backplate connection box is the input, and the Type 2 socket is the output.

For safety reasons, enabling this test mode can only be done by Zaptec.

Was this article helpful?
1 out of 1 found this helpful