How to Zero the Imatest Low Light Illuminance Sensor

This procedure is how to zero an ILLIS Imatest Low Light Illuminance Sensor. This is necessary to

1. Turn on both the sensor and the readout display by holding their respective buttons

2. Quickly press the button on top of the readout display three times to open the settings interface

3. Hold the button for more than one second to access the zeroing setting

4. place the meter sensor-down so all light is blocked

5. Hold the button for more than one second to accept the zeroing

Zeroing can also be performed through the Android and Windows interfaces