.. _htg_bring_up_powermeter:

##################
BringUp Powermeter
##################

In case your charger prototype has a power meter, it may be a good time
to verify its functionality as well now - even though it is not strictly
necessary for charging.

Write a bring-up config for your power meter and start it the same way
as described in :ref:`htg_bring_up`. There are a few examples you can copy
and modify, e.g. “config-bringup-DZG.yaml” or “config-bringup-LEM.yaml”.

.. code-block:: bash

   /etc/everest/run_tmux_helper.sh /etc/everest/bringup/config-bringup-mypowermeter.yaml /usr

Your setup should look like this:

.. image:: images/bring-up-powermeter.png
   :alt: Bring-Up Powermeter

Complete the following steps:

-  ☐ Verify that the measurements come in regularly (e.g. every second).
-  ☐ Imported energy in Wh and timestamp are the only required values.
   Verify they are correct. For bidirectional metering, also verify the
   exported energy values.
-  ☐ Validate the other reported measurements.
-  ☐ If supported by the power meter (e.g. for
    :doc:`German Eichrecht </explanation/eichrecht>`), click
   on “Start Transaction”. Verify that it replies correctly, and verify
   the time to reply is less than a few seconds.
-  ☐ Click on “Stop Transaction” and verify the reply. The reply should
   not take more than a few seconds.
-  ☐ Apply some test load if possible, and verify that the flow
   direction of energy is correct. A common mistake is to swap input and
   output of the meter. If you don’t have a test load, you can also test
   this when doing the first charging tests with a real car.

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Authors: Cornelius Claussen