　　USB interface: connect to the USB port of the collector or computer (after the connection is successful, the "" icon will appear at the top of the screen);

　　Power key: open an account or turn off the power;

　　Charging status indicator: The red light represents the charging status; the green light represents the completion of charging.

　　1. Backlight switch key:

　　(1) When the sensor is turned on, long press this button (after the backlight is turned on, the "" icon will appear at the top of the screen) or long press to turn off the backlight (when the backlight is turned off, the icon at the top of the screen disappears);

　　(2) When the sensor is turned on, short press this key (the current display data is locked, the "" icon will appear at the top of the screen) or short press again (unlock the data);

　　2. Data save key: this function is not yet open

　　3. Wireless Bluetooth function switch key: When the sensor is on, long press to turn on the Bluetooth function (after the function is turned on, the "" icon will appear at the top of the screen) or long press to turn off the Bluetooth function (after the function is turned off, the icon at the top of the screen disappears); : The flashing Bluetooth icon means that the Bluetooth adapter is not successfully connected, that is, the icon does not flash after the Bluetooth adapter is successfully connected;

　　4. Function key: When the sensor is turned on, this key has different functions for different sensors;

　　5. Sensor peripheral interface: different sensors have different peripheral interfaces;

　　On-screen display icon description

　　Part 1 Icon Description (from left to right): backlight, lock screen, Bluetooth, USB connection, battery

　　Note: The blinking of the Bluetooth icon means that the Bluetooth adapter is not successfully connected, that is, the icon does not flash after the Bluetooth adapter is successfully connected;

　　Part 2 Icon Description: Signs and data display;

　　Part 3 Icon Description: Save data and progress bar-this function is not yet open;

　　The fourth part of the icon description: display ID (that is, the sensor group number is displayed) and Hz (that is, the current sampling frequency of the sensor is displayed)-this function is not yet open;

　　Part 5 Icon Description: Function indicator icon (from top to bottom: S5 position, S6 position, S9 position, S10 position), see the description of each sensor function below for details;

　　Part of the special function description of the sensor with screen in version 2.0

　　Force sensor

　　When the sensor is turned on, long press the "function key" for the zero calibration function;

　　Voltage sensor:

　　1. When the sensor is turned on, long press the "function key" for the zero calibration function;

　　2. Connect the red and black wires to the socket at the external projection interface;

　　current sensor:

　　When the sensor is turned on, long press the "function key" for the zero calibration function.

　　Photoelectric door sensor:

　　1. When the sensor is turned on,

　　(1) Long press the "function key" for the zero calibration function;

　　(2) Short press the "Function Key", the display of "Part 5 Icon" on the screen will change (refer to the "Screen Icon Diagram" in the above figure), the description is as follows:

　　S5 position is on: measure the shading time;

　　S6 position is on: measure the light transmission time;

　　S9 position is on: measure three periods of time;

　　S10 position is on: measuring the full cycle time;

　　S5 and S6 positions are on at the same time: measure light transmission + shading time;

　　S5 and S9 positions are on at the same time: measure the number of drops;

　　S5 and S10 positions are on at the same time: it is used in the double-hole photoelectric door speed measurement mode;

　　2. External projection interface: use a USB cable to connect the photoelectric gate.

　　Motion detector

　　1. Receiver: When the sensor is turned on, long press the "function key" for the zero calibration function;

　　2. Transmitter: When the sensor is turned on, short press the "function key" to turn on/off the transmitter measurement mode. When it is turned on, the sensor screen will display "1" and when it is turned off, it will display "0".

　　Accelerometer:

　　1. When the sensor is turned on, short press the "Function key", the display of "Part 5 Icon" on the screen will change (refer to the "Screen Icon Diagram" in the above figure), the description is as follows:

　　(1) S5 position is on: measure vertical acceleration;

　　(2) S6 position is on: measure the acceleration in the lateral direction;

　　(3) S9 position is on: measure the acceleration of the sensor in the horizontal direction.

　　Air pressure sensor

　　When the sensor is turned on, long press the "function key" for the calibration function.

　　Micro current sensor

　　Connect the red and black wires to the socket at the external projection interface

　　Conventional temperature sensor

　　Connect PT100 temperature probe to the external projection interface

　　Thermal temperature sensor

　　Quick response temperature probe connected to the external projection interface

　　High temperature sensor

　　Connect the high temperature probe to the external projection interface

　　PH sensor

　　Plug the PH probe into the external projection interface

　　Conductivity sensor

　　Connect the conductivity probe to the external projection interface

　　Oxygen sensor

　　1. When the sensor is turned on, long press the "function key" for the calibration function;

　　2. Connect the oxygen probe with the audio port at the external projection interface;

　　Integrated temperature and humidity sensor

　　When the sensor is turned on, short press the "function key" to switch the display of temperature/humidity value; (refer to the "screen icon diagram" in the above figure)

　　(1) S5 position is on: the current humidity value is displayed at this time;

　　(2) S6 position is on: the current temperature value is displayed at this time.