Registratore dati di temperatura e umidità Elitech RC-4HC (USB)

I have trobble to start nwe logging.
In the 1st mont the instrument worked well.
This morning i stopped the logging and stored the results.
but now I cannot retsrat the logging, neithe r in case of connected the instrument with the PC nor without connection.
In the user manual is indicated that the logging start starts with press and hold the buzzer, but that doesn't work.
What action do you recommend?
Kind regards
Werner Rossbach

Bought one to monitor a radiator to determine the duty cycle of the central heating. Worked really well, so bought a second to use outdoors and allow me to correlate the heating with the weather conditions. Excellent gadgets.

This is one of the best instruments I have ever used. I have several Meters for multipurpose and this unit is the best in terms of efficiency, design, software. If you really need to monitor Temp and Hum and log the information there is no chance to go wrong with this unit.

The device itself is very easy to use. It has a single button, which you press to begin recording, and to cycle through the current, maximum and minimum temperature values on the LED display. It therefore lets me crudely monitor the conditions without having to upload all the data.

I have been using this device continuously for a week now, and have to say I am extremely satisfied in its performance. I needed a data logger to monitor the temperature and humidity in my refrigerator, and given the cheap price and good reviews on their other products, I figured it was worth giving Elitech a go.