GE General Electric Oxygen Equipment PT878 用户手册

Chapter 8. Servicing the PT878

Transport® Model PT878 Portable Liquid Flowmeter User’s Manual

189

The Test Keys option checks the functioning of the various keys on the 
keypad. To start the test, scroll to the Test Keys option on the Test Menu and 
press 

[ENTER]

. The screen appears similar to Figure 125 below. Press any 

key on the keypad, and a window representing that key should darken.

Pressing the 

[F3]

 key returns the meter to the Operate Mode. If any key does 

not appear on the screen, contact the factory.