TESTO 549 - 4 Product Overview; 4.1 Instrument Display and Controls

4 Product description
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4 Product description
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4.1. Overview
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Display and control elements
1 Mini-DIN probe socket for NTC temperature probe, with socket
cover
2 Foldable suspension device (on rear)
3 Display. Instrument status icons:
Icon Significance
Battery capacity
Bluetooth®, (see Switching Bluetooth® on and
off (testo 550), page 15)
//
Select measuring mode (see Selecting the
measuring mode, page 15)
4 Battery compartment. It is not possible to charge rechargeable
batteries in the instrument!