TESTO 477 - Factory reset; Key lock; Internal;external trigger signal

6 Using the product
37
6.1.2. Factory reset
✓ The instrument is switched on.
1. Press [M] + [–].
- Instrument is reset to the factory settings.
- Instrument returns to Measuring Mode.
6.1.3. Key lock
✓ The instrument is switched on.
1. Press [
] + [–].
- Key lock is activated.
2. Press [
] + [–].
- Key lock is deactivated.
6.1.4. Internal/external trigger signal
The instrument is set to an internal trigger signal at the
factory.
✓ The instrument is switched on.
✓ When switching to an external trigger signal: Trigger cable is
connected, see Connecting the trigger cable (page 34).
1. Press [M] + [ ].
- The instrument switches from internal trigger signal to external
trigger signal.
- The status display EXT appears in the display and the unit
changes to 1/min.
2. Press [M] + [
].
- The instrument switches from external trigger signal to internal
trigger signal.
- The status display INT appears in the display and the unit
changes to FPM.