2.3.1 Working with Batteries
If batteries are used as power supply, you must select Battery
in the Parameter/Power Supply menu. With this setting, the
Charge function is disabled.
2.3.2 Working with Rechargeable Batteries and PSU
If rechargeable batteries are used as power supply, you have to
select Accu in the Parameter/Power Supply menu. With this
setting, the Charge function is enabled when the charging
mode is set to ON (indicated by an X in the square box).
Do not enable the charge function while batteries are in the
device.
The device turns on automatically when the LB134 is con-
nected to mains, directly or through the wall holder. The
charging process restarts depending on the settings in Cell
Type, Charge Mode and Charge Time:
The charging process only takes place when the device is
switched on.
2.3.3 Power Supply for External Probes
Batteries or rechargeable batteries supply power to the basic
unit and also to the external probes (5 V). The high voltage in
the probes is adjusted internally in the probes, but may also be
set using the control voltage (see below). The default setting for
the control voltage is 2.5 V.
2.3.4 Power Supply and Program Memory
1. The software program, the factory-set calibration factors and
any fixed settings are stored in FLASH and are independent
of the power supply.
2. The user-defined calibration factors, threshold settings, date,
measured values, etc. are stored in RAM (Li-battery-
buffered). Using the Reset function (factory settings under
Parameters/Factory setting), these values can be deleted, in
which case the factory-defined settings are loaded. This
function is available only when the appropriate privileges
have been assigned.
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