Fault description:

• The machine suddenly shut down by itself, rebooting only lasts a second or two, or it can not turn on.
• The machine cannot be turned on after charging, black screen

Solution: If the TF memory card is full, please replace it with a new card in time. Otherwise, there may be a sudden automatic shutdown of the machine, and can not open the machine.

If the above problems occur, try the following steps to rectify the fault:

1. Take out the TF memory card on the bottom of the machine 2. After power off, connect the charger to charge for more than 6 hours and then turn it on without the TF memory card to see if it can work.

Regarding machine reading is high on first use Solution: After receiving the machine, put it in an outdoor clean and ventilated environment for about 8 hours, so that the charge can be released. (Charger can be connected to ensure the power supply)

Regarding the high TVOC level

Please check your measuring point if there are some human activities such as cooking, smoking, drinking or some chemical gases such as perfume, air freshener, detergent, etc.

Then try to put the machine in an outdoor clean and ventilated environment for more than 3 hours to see if the machine value will drop ( formaldehyde is about 0.02. TVOC and particulate matter are based on your local environment, but TVOC is usually lower outdoors than indoors, unless there are a lot of car exhaust, bakery and factory emissions around you).

If the TVOC reading of the machine is high when it is placed indoors, but TVOC reading drops when it is placed outdoors in a well-ventilated place, it proves that there is no problem with our sensor, which is completely logical. Place to outdoor the reading drop but place to indoor reading rise proves that there must be air in the room that affects the sensor reading.

About TVOC and HCHO calibration:

We should calibrate the equipment in fresh outdoor air, because particulate pollution and chemical pollution are two different types of pollution. Very low particulate matter does not mean that chemical pollution and interfering gases do not exist.

Our sensor calibration function is for formaldehyde and TVOC. You can put the machine in an outdoor well-ventilated place for 2hours to see if the readings of formaldehyde and TVOC exceed the standard. If all the readings of formaldehyde and TVOC are very low, you can calibrate it.

Our machine calibration: 1. The machine leaves the factory with our calibrated formaldehyde zero point as the zero point, and restoring the factory settings will also restore to our factory calibrated zero point. 2. If you calibrate the device on site, the device will use the current calibration environment as the zero point. 3. After you finish the calibration, if the current calibration environment formaldehyde value is higher than the factory calibration zero point, it will be displayed as a positive number in the calibration setting interface of the machine.

If the current calibration environment formaldehyde value is lower than the factory calibration zero point, it will display Is negative.

4. Under normal use, frequent calibration is not required.

How to open TXT data record file with excle 1. Create a new excel document 2. Click on the file to open a new document, select all files, and open the data storage file Save.txt 3. Select Fixed width-add space to align each paragraph of characters, click Next, column data format, select Normal, and then click Finish