Hi Rob!

LED flashing quickly means one of the self-tests failed in booting up the meter. That should not happen! Did it arrive with the LED flashing? Or did something change, for example loading new firmware?

Logging: The text on the logging button reflects the present behavior of the meter. So if the button is red and says “LOGGING:OFF” it means logging is presently off, and pressing the button will turn logging on. Note that an SD card must be inserted for logs to be recorded.

Thanks, let me know about that fast blink issue, if it arrived that way we will send you a replacement. Best,
~James