Make sure you disconnect the batteries completely before starting! Disconnect the solar charger, then the node battery and finally, the autosampler battery.

1. Set the multimeter to the setting with the noise symbol (blue circles). On our version, turn dial to the noise symbol then press the setup button to display the noise symbol on the screen.

Your multimeter setup may be different depending on the brand/model.

2. To make sure you are on the noise test setting. Touch the red and black lead together (yellow circle). You should hear a noise.