Initial Operation - TESTO 645 Instruction Manual

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Do not switch instrument on or off with the
- during instrument configuration
Complete automatic saving before connecting instrument to the Comfort software.
If the instrument does not function remove battery and put it in again. The respective error
message is shown in the display. Refer to the information on "Error messages" on page 33 of
Observe storage and transport temperature and max. operating temperature (e.g. protect
measuring instrument from direct sunlight)
When changing configurations (e.g. changing the probe), the instrument should be switched off
because the values specific to the probe can only be read when the instrument is switched on.
The V24 cable (PC connection) can be inserted anytime.
A simultaneous print command is not possible if the PC cable is connected.
Ensure that the contacts are correct in probes with a plug-in head.
The swivel nut in the probe handle should be securely tightened.
Opening the instrument, inexpert handling and use of force cancels your warranty.
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Please read prior to measurement
Do not measure on live parts.
- during automatic saving
the Instruction manual.
Putting in the batteries
9V block battery is included in delivery.
Open the battery compartment at the back of the instrument.
Put in block battery. Observe polarisation.
Close battery compartment.
Refer to "Power supply" Chapter for more information on
alternative power supply, charge, battery quality, charging
procedure.
Observe instrument configuration when using
rechargeable batteries.
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Initial operation

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