【PCBA program design】Grip dynamometer program

1. Technical Specifications of Grip Dynamometer

1) LCD display: 888.8

2) Rated range: 123KG

3) Graduation value: 0.1KG/0.1LB

4) Minimum weighing: 2KG/4LB

5) Unit: KG (default)/LB

6) Button: ON/OFF START

7) Overload prompt: "ERR" is displayed when it is greater than 123KG

8) Low voltage detection: 2.4±0.1V

9) Power supply voltage: 3.0V

10) Working current: <15ma

11) Quiescent current: <5ua

12) Boot mode: on/off button to power on

13) Shutdown time: 120S

2. Functions of Grip Dynamometer

1. Weighing:

①In the off state, press the button to turn on the power, return to zero normally, memorize the last unit, measure once, display the grip strength value, keep the display of the maximum grip strength value, turn off if there is no operation time, and display ERR if it exceeds 123kg, and return to display the maximum value after 3 secondsvalue.

②Press the START key to return to zero, wait for the measurement again, it is valid if it is greater than 5KG, and "HOLD" lights up

③Display the maximum grip strength value, the grip strength increases without returning to zero, refresh the grip strength value, the grip strength value returns to zero, the grip strength is greater than 5kg and keeps displaying the maximum grip strength value, less than 5kg displays 0.0kg, hold goes out, and waits for the next measurement.

2. Low voltage alarm: When the power supply voltage is lower than 2.4V±0.1V, it will display "Lo" when it is turned on, and it will turn off automatically after about 1 second.

3. Overload display: When the grip strength is greater than 123.00KG, "ERR" will be displayed, and the grip strength will be reduced to less than 123KG and return to normal measurement.

4. Calibration for the first time: After powering on, after returning to zero, put a weight above 30Kg, the version number will be displayed for 2 seconds, after the calibration zero point is stably obtained, it will display 40.0Kg, put a 40Kg weight, after it is stable, it will display 80.0Kg, put 80KgAfter the weight is stable, it will display 120.0Kg, put the 120Kg weight, write the calibration data after it is stable, and then display "PASS", the weight calibration is successful.

5 Secondary calibration of weight: (1). For the calibrated scale, you can press the on/off button "three short and one long" to display the version number to enter the calibration, press the button again, after it is stable, it can display 40.0Kg, the remaining steps are the same as 4 (to ensure accurate zero calibration, it is recommended to wait 2 seconds before placing the weight)