User's Manual

7 Maintaining the product
31
1. Open the battery lock: Press the grey button (1) and push to the
left keeping the button pressed (2).
2. Remove the battery and insert a new rechargeable battery. Use
only Testo rechargeable battery 0515 0107!
3. Close the battery lock: Press the grey button and push to the
right keeping the button pressed until the battery engages.
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7.6. Replacing sensors
A slot bridge (0192 1552) must be inserted in slots which
are not equipped with a sensor. Used sensors must be
disposed of as hazardous waste!
✓ Measuring instrument is open; see Opening the measuring
instrument, page 27.
1. Disconnect the hose connections from the faulty sensor
(1)/bridge (2).
2. Remove the faulty sensor/bridge from the slot.
> For NO sensor: Remove the auxiliary circuit board.