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Take care not to damage the sensor tip. Use the protection cap for the sen-
sor tip as soon as the electronic sensor assembly is no longer mounted in
the interchangeable fitting.
6.5
Cleaning the sensor
The sensor is cleaned by the service provider/manufacturer before each
calibration. It is recommended, however, that the operator regularly checks
the sensor for residual dirt during operation, cleaning if necessary. Oil resi-
dues, for example, falsify the measurement results.
You can remove the electronic sensor assembly and clean it manually. In
the model 0699 6447, this can be carried out during operation (installa-
tion/deinstallation: chapter 6.1).
• Always clean the sensor using only approved cleaning agents ( Section
6.6).
• Do not use any chafing (abrasive) cleaning agents. These can lead to ir-
reparable damages to the sensor.
• Carry out a new inspection after the cleaning, as required.
6.6
Cleaning agents
For cleaning the sensor, use agents containing surfactants (alkaline) or wa-
ter-soluble organic solvents (e.g. ethanol).
Isopropanol is recommended for cleaning various contamination, especially
greases and oils.
Do not use organic solvents containing halogens or acetone. These solvents
can destroy plastic parts of the electronic sensor assembly and some are
also believed to be carcinogenic (e.g. chloroform).
6.7
Calibration
Because of contamination (e.g. oil, water, particles), an annual recalibration
of the electronic sensor assembly is recommended, and one must take place
at least every 24 months. This is mandatory for accounting purposes, please
contact Testo.
0699 6477: Thanks to the interchangeable fitting, the calibration and service
tasks for the electronic sensor assembly are also possible at any time with-
out interruption of operation. However, please note the operating notes for
secure handling under operating conditions in section 6.1 and the following.
6 Operation
39
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