Basic operating steps

1Check if the sampling filter membrane is installed or if it needs to be replaced (refer to the operating instructions)4.2）.

2Turn on the power switch of the instrument.

3Check battery status: Press under the main menuopen/stopPress the key to measure, and the screen will display the battery status (press again)open/stopCan be exited), if the battery level is displayed as below30%Please use after charging (please refer to the instructions for charging)4.7Enter the "charging mode" for charging.

4Calibration (if necessary):

lWhen calibration is required, please press4.3.1Perform 'measurement calibration';

lIf you need to use the weighing method to calculate the mass concentration, please follow4.3.2Perform flow calibration;

lpress4.3.3Calibration date and time.

5Select the measurement mode and set the parameters according to the corresponding chapter (or confirm the default settings).

6Start measurement: Press in the selected modeopen/stopThe key.