TESTO 300 - Open the Measuring Instrument

15 Maintenance
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15.6 Open the measuring instrument
Only open the measuring instrument when this is required for maintenance
purposes (replacing gas sensors).
✓
The measuring instrument must not be connected to a mains socket via
the mains unit. The measuring instrument must be switched off.
When opening/assembling the instrument, take care not to lose any
screws that have been removed. It is advisable to place a cloth on the
work surface.
1
Place the instrument on its front so that the back is facing upwards.
2
Using a torx screwdriver (size T 10),
remove both housing screws on the
top of the instrument.
ATTENTION
The instrument may be damaged by incorrect removal of the housing
screws!
- Only remove the two housing screws on the top of the instrument. The
other four screws must be left as they are.
3
Unlock the operating module in the
direction of the arrow.
4
Remove the operating module.
5
Place the instrument on its front again.
6
Remove the remaining four screws on the back of the instrument.