Do I need to take a voltage reading with the LED transformer?

It’s not necessary. The electronic transformer automatically supplies 11.5 volts AC and adjusts for the amount of demand. The actual output will vary depending on the amount of fixtures but will not exceed 11.5 volts AC.

When utilizing a magnetic transformer, it is recommended to always take a voltage reading to ensure your fixtures will perform as warranted.

Do fixtures dim with further distances as with magnetic transformers?
Does the electronic transformer require a minimum load to turn on?