Chapter 4 - Startup
10911 V01.06
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Chapter 4
Startup
4.1 Mains
operation
Only power the instrument from the mains using an external mains adapter connected to the 12 V
extra-low voltage jack. A suitable adapter with connecting cable is included in delivery (see “External
power supply”).
Important!
Always disconnect the instrument from the power supply when disassembling
the instrument (e.g. replacing batteries).
4.2 Battery
operation
4.2.1 Replacing the battery
Only the manufacturer or service technicians authorised by the manufacturer may replace the
internal battery. The manufacturer’s guarantee will be void if the housing of the measuring receiver is
opened by anyone else.
4.2.2 Battery
management
The instrument has internal battery management, which optimises the charging and discharging of
the battery. The battery begins to charge as soon as the instrument is connected to the mains or an
external voltage supply. The instrument starts in charging mode if it is not being used; during this
time only the OSD window on the top left is shown with the text “Charging BATT” and the battery
symbol. The display screen turns off after a minute. Pressing any button turns the display back on. If
the instrument is operated in measuring mode, the charging current may be reduced somewhat
depending on the operating status, causing the charging process to take longer. When the battery is
being charged, the “charge” LED lights up red. Once the battery is fully charged, the internal battery
management switches to maintenance charging and the “charge” LED turns green. The instrument
also has a charge status indicator. A status bar in the frequency window indicates the remaining
charge of the battery at all times. If the battery charge becomes critical, the word “low” appears in red
next to the bar. You can still complete the current measurement, but the battery should then be
recharged as soon as possible. The instrument shuts down automatically to prevent total discharge.
Storing the battery and operating the device at low temperatures
Because of the chemical reactions inside the battery the performance of the built in battery is
somewhat reduced at low temperatures. It is not possible to charge the battery when the temperature
is below 0°C.
4.3 Operation
using
an external power supply
In addition to using the battery, you can run the device on external direct current supplied by the
mains adapter or the cigarette lighter adapter in a vehicle, for example. Direct current is fed via the
extra-low voltage jack on the bottom section of the instrument. The external voltage supply must be
in the range of 11
V to 15
V. The maximum current consumption is 2.5
A. When the instrument is
supplied with appropriate voltage, the “charge” LED on the front side of the instrument lights up.
4.4 Ventilation
control
A small, in-built fan ensures that the electronic components are well ventilated. This fan is controlled
by the microprocessor using a temperature sensor.
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