Power Meter Operation
Battery Operation (Option 001)
Agilent E4419B User’s Guide 2-5
To access the backlight menu press  ,  ,  ,  . 
Use the softkeys on the menu to select either  ,  , or   .
Note   If the power meter is connected to an ac power source the 
backlight menu is greyed out and the backlight is permanently on.
Battery Removal/Replacement
The battery unit is easily removed and replaced. Follow the instructions 
given in Figure 2-2. To obtain a replacement battery unit order Agilent 
part number E9287A (this can only be used in power meters with option 
001 installed).
WARNING   This product uses a Nickel Metal Hydride battery.
Do not short circuit the battery terminals.
Do not subject the battery to excessive heat.
Do not dispose of by burning.
Refer to your local country regulatory requirements on the 
disposal of Nickel Metal Hydride batteries.
Caution   Observe static precautions while removing and replacing the 
battery module.
System
Inputs
More Service Battery
On Off Timed
HP4402.book  Page 5  Thursday, November 30, 2000  1:39 PM