3 Preparation for use EFA-200/-300
3-2
3.2 Power supply
• The EFA-200 / -300 Basic Unit operates from dry cells or rechargeable
batteries.
• The E-Field Unit for the EFA-300 contains built-in rechargeable
batteries.
3.2.1 Operation from rechargeable batteries / dry cells
Replacing the rechargeable batteries / dry cells: see page 10-1
Operation from rechargeable batteries
The Basic Unit is operated from five 1.2 V NiMH batteries (baby or size C,
IEC
R 14).
Fully charged batteries will provide power for about 10 hours of operation.
The batteries are supplied pre-charged, but will need to be fully charged
before the device is used for the first time.
Operation from dry cells
Basic Unit only
Five 1.5 V alkaline batteries (baby or size C, IEC LR 14) can be used in the
Basic Unit instead of rechargeable batteries.
These batteries will provide power for about 20 hours of operation.
Low battery display
The message “LOW BATTERY” appears in the display when the
rechargeable or dry batteries are almost discharged.
Note: You can continue measurements for about 15 minutes after the
“LOW BATTERY” warning appears.
The built-in lithium battery provides power for the result memory when the
batteries are completely discharged or when they are being replaced.
Lithium battery: see page 10-3
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