Thermo Scientific APEX 100 User Manual page 31

3) Press the Go button and the inputs and outputs menu appears.
Inputs and Outputs
4) Press the right-navigation button to select the inputs menu.
Inputs
5) Press the Go button and page 1 of the input set-up menu appears.
Input Setup
6) Navigate to the "Infeed Photo Eye Input" menu, shown below.
Infeed Photo Eye Input
Look carefully at the "+2" notation in this menu, which tells you two things:
• The in-feed photo-eye is connected to Input 2 on the detector's wiring board.
• The input voltage has a positive (+) polarity.
Thermo Scientific APEX User's Guide Page 31