Safety references 3. Malfunctioning and inadmissible operation 4. Safety regulations 4.1 Special conditions for use in Zone 0 5. Ex-Data 6. Technical Details 7. Operating instructions 7.1 Commisioning 7.2 Switching-on and measurement 7.2.1 Switching-on 7.2.2 HOLD-Function 7.2.3 Auto-Off-Function 7.2.4 Changing measuring range 7.2.5 Switching-off 7.3 Battery change 7.4 Temperature probe 7.4.1 Standard probe 7.4.2 Special probe 7.4.3 Calibration instructions 8. Repair 9. Cleaning and maintenance 1