How calibrate the Ethernet tester?

To calibrate an Ethernet tester, first ensure that the device is fully charged or plugged in. Connect the tester to a known good cable and check for proper readings; if discrepancies are found, consult the manufacturer's instructions for specific calibration procedures. Some testers may require you to access a calibration mode through their interface, while others might need to be recalibrated using reference standards. Always document any changes made during the calibration process for future reference.