2201R Mobile Tester User Guide
Chapter 2 Instrument setup and general operation
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Power status LED
The power status LED is located next to the on-off switch. It is a two-color LED that shows the DC power condition
of the instrument and the state of charge of the battery, if fitted (see Table 5). A new instrument is delivered with a
partially charged battery, which starts charging as soon as the DC supply is connected. You can use the instrument
straight away even if the battery is uncharged or is not installed.
Switching off the 2201R
To switch off the instrument, press and hold the power switch on the front panel for a few seconds. If the
instrument is being transported in its case, turn off the Power rocker switch on the rear panel too.
Table 5 Power status LED states
Power source Instrument state Green LED Yellow LED
External DC Instrument off OFF ON
External DC Instrument off, battery charging Flashing (yellow/green) Flashing (yellow/green)
External DC Instrument on ON OFF
Battery Instrument on, battery state of charge ≥15% ON OFF
Battery Instrument on, battery state of charge <15% Flashing OFF
Battery Instrument off OFF OFF
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