Just started using the Bluetooth feature. The default measurement polling rate is once per second. However, you can change this by switching to "offline" mode. If you go offline, your BT tablet/device will be disconnected from the meter and the meter will save the readings to internal memory. I wanted to take voltage readings every 5 minutes, so I set the polling time to 300 seconds. CONS: - Instructions are not easy to understand. - I can't understand the buttons in the Android app because the Bluetooth multimeter is new to me. I have to figure out the buttons myself by playing with them. The writing in the booklet is too small for my old eye. Please include a link to the PDF of the booklet in the product description so I can print it out in double size. ADVANTAGES: - Has an offline mode when the meter is connected to the tablet for the first time, but then disconnects and saves the measurements to the internal memory. Only the "+" model has this offline mode. - Comes with a thermometer sensor and cables. - Nice thick cables. - Sensors come with a plastic cover showing only a tiny piece of sensor metal. Rubber bushing, probe covers removed. and screwed the probes into special alligator clips. This is not a friction fit. The new batteries lasted 20 hours offline. No problem. - The app is free. - Has a continuity tone, can test capacitors, plus voltage, amps, ohms. I haven't tested other typical MM features. The backlight stays on for about 60 seconds. It is very good! The 5 second backlight on my other DMM is not enough. I can review your instructions in English if you'd like.
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