TESTO 550i - Cleaning the Vacuum Probe

9 Maintenance
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1
Fold out the suspension hook, release the clip and remove the battery
compartment lid.
2
Remove the (rechargeable) batteries and insert new ones into the
battery compartment (3 x type AAA / Micro / R03). Observe the
polarity!
3
Attach and close the battery compartment lid (the clip must click into
place).
4
Switch the instrument on.
9.7 Cleaning the vacuum probe
Contaminants such as oil may impair the accuracy of the vacuum
sensor. Perform the following steps to clean the sensor.
ATTENTION
Carrying out cleaning with the probe switched on may result in damage to
the probe!
> Switch off the vacuum probe!
ATTENTION
Damage to the sensor due to sharp objects!
> Do not insert any sharp objects into the probe!
1
Switch off the vacuum probe.
2
Put a few drops of rubbing alcohol into the sensor opening.
3
Seal the opening by placing your finger on it and shake the vacuum
probe briefly.
4
Remove all the alcohol from the probe.
5
Repeat this process at least twice.
6
Leave the probe to dry for at least 1 hour.
To dry the sensor faster, you can connect the probe directly to a
vacuum pump and apply vacuum.