103076-01EN [U8998318], Rev. C, June 201410 Instrument Batteries3.3.3 Test ScreenDuring Cal Checks or while samples are being tested, the test screen’s lower status bar provides an indication of theprogress (see Figure 3-2 on page 10). Upon completion, a Ready indicator is displayed (ready for next operation).Figure 3-2 Test screen status bar4. Instrument BatteriesThis section explains how to use and charge the batteries of a DELTA handheld XRF analyzer.4.1 Battery StatusTo test a Li-ion battery charge status, press the white button on the battery (see Figure 4-1 on page 10). The green lightsindicate the percent of charge remaining, ranging from less than 25 % to 100 %. If a battery has a charge of less than 25 %,use the docking station to perform a full charge.Figure 4-1 Battery charge status button4.2 Charging Batteries4.2.1 Charging Batteries Using the Docking StationThe DELTA handheld XRF analyzer comes with a new multipurpose tool: a docking station (see section “Docking Station”on page 5 for hardware details). In addition to providing an automatic Cal Check, the docking station delivers twocharging functions:• It can be used to charge the installed Li-ion battery located in the instrument’s handle.• Simultaneously, it can be used to charge a second battery with its special battery charging socket.The charge status is shown in real-time on the DELTA’s display screen (see Figure 4-2 on page 11).Status bar