Maintaining and Troubleshooting the PM880 8-7February 2005Testing the Keypad1. If the menu is not active, press [MENU].2. Use the arrow keys to scroll to Service and press [ENTER].3. Use the arrow keys to scroll to Test and press [ENTER].4. Use the arrow keys to scroll to Test Keys and press [ENTER].The screen appears similar to Figure 8-3 below.Figure 8-3: The Test Keys Window5. Press any key on the keypad. The corresponding box on thescreen should darken.Note: If the box does not darken or if the key does not appear onthe screen, contact GE Infrastructure Sensing.6. Press [F3] and then [MENU] to return to taking measurements.If any key does not appear on the screen, contact GEInfrastructure Sensing.
