User manual

OPERATION
Initiating Communication
1. Turn the HD450 Light Meter ON and then connect it to the PC USB port using the supplied USB
cable
2. Run the HD450 software program.
3. When communication is established, the meter’s display and the virtual meter display (software
window) will indicate the same value
4. If communication is unsuccessful the virtual meter will display "OFFLINE"
5. If communication fails, check that the USB cable is connected correctly (replace the cable if the
cable is faulty), close all other applications and then choose other serial ports from the menu
until communication is successful (wait a few second after a new COM port is selected).