Fluke 1522 - Manual (Page 26)

6 General Operation
This section explains the details of the operation of the 1522 with its compo-
nents and accessories.
6.1 Battery
The 1522 has a built-in nickel-metal-hydride battery pack that can power the
instrument for about 18 hours before needing to be recharged. The battery dis-
charges much more quickly if the display backlight is used. The battery charge
remaining or the message “External Power” is shown on the display when the
instrument is switched on. The battery percentages are approximate and should
be used as general guidelines when determining the length of charge remaining.
The battery is recharged in situ (while in place) using the AC adapter. Plug the
AC adapter into an AC socket of the appropriate voltage as noted on the AC
adapter (normally 115V, optionally 230V). Connect the DC plug of the adapter
into the DC input of the 1522 located on the right side. The battery charges as
necessary whether or not the instrument is switched on. The power control cir-
cuit inside the instrument manages battery charging and stops charging the bat-
25
6 General Operation
Battery
Figure 5 Battery Installation