After the repeatedly tested and repeated discusses modification, the Latest LCD Screen Constant Current/Voltage Power Module have already come to meet with you.
With voltage and current LCD digital display, no need extra multimeter, convenient and powerful. The module is also equipped with crystal acrylic shell and USB interface, can satisfy your various application. However, we also received some questions from the reviewers and customers, so this is written for modifying the product description. For any further concerns, please write to us we will be more than happy to assist you.
How to Calibrate Accuracy?
Because of the wide voltage and current range of the module, there will be slight difference within certain range in measuring the electronic components. For this issue, this module is specially added the calibration function to completely solve the measurement error and make the measurement more accurate. If you found that the measured value is not accurate, you can calibrate the module by following methods. Just for the first time using a calibrated once.
Voltage calibration: in the state of power off, press “SET” button and do no release, power up the module then it will enter voltage calibration mode. The LCD screen will flash. At this time, release the “SET” button. “SET” button is for adding value, “ENT” button is for reducing value, adjust the input voltage to right value. E.g. : if the input voltage is 12.65V, adjust the voltage of the module to 12.65V, the value will be saved automatically in 2 seconds, switch off the power then the calibration is completed.
Current calibration: this function is suitable for the case that there is current displayed when without load or the displayed value is much larger. In the state of power off, press “ENT” button and do not release, power up the module, then it will enter current calibration mode. The LCD screen will flash. At this time, release “ENT” button, “SET” button is for adding value, “ENT” button is for reducing value, adjust the current to right value. E.g.: in state without load, if the current displays 0.02A, adjust the value to 0.00A, the value will be saved automatically in 2 seconds, switch off the power then the calibration is completed.
The Output Voltage is Unable to Adjust??
The default output voltage of the module is about 20V. If the voltage cannot be adjusted, please counter clockwise rotate the ADJ-V potentiometer for more than 10 laps until there is a change in the voltage value, then the voltage can be adjusted normally.
Operating Tips that Require Attention
The output voltage of USB interface is the same as the output voltage of the module. There is no output through the USB interface when the USB indicator is off. There is not fixed 5V output through the USB when the USB indicator is on. If you need to charge for your USB device, please set the output to 5V before charging. If the output voltage is higher than 5.5V, the LCD screen will flash to remind you to adjust the voltage, otherwise, your USB device will be damaged. The USB output is off by default to ensure that your device is not damaged by misplugging.