Cleaning and maintenance
22 | 26 Operating instructions HE 50 | Revision 7
Maintenance
Maintenance is a part of servicing and refers to the scheduled cleaning, checking and
replacement of wearing parts. The aim of maintenance is to maintain the full
functionality of the device over its lifetime.
The HE 50 should therefore be checked for wear and tear at regular intervals. The
inspection intervals depend on the significance of the measured value, the frequency
of use and the ambient conditions to which the HE 50 is exposed. Only through regular
checks (visual inspection) can damage to the device caused during use be detected
early and reliably. We therefore recommend that this check will be carried out at least
once a year, preferably after the harvest period.
If you are unsure whether your device is still completely ready for use, Pfeuffer GmbH's
professional service team will be pleased to assist you.
The HE 50 is often used in goods traffic. According to the QM system according to
ISO 9001, the HE 50 must then be qualified as test equipment and regularly verified. It
is useful to define an annual inspection interval.
In this context, it is necessary to check the accuracy of the measured values (e.g. by
comparison with a drying oven sample). We recommend having this service performed
by a qualified service partner.
Our distributors are at your disposal.
Wear parts and possible wear:
Milling discs: flaking of the chrome plating, abrasion of the fluting
Spindle on the measurement cell bottom part: dirt in the threads
Contact pins: wear, weak contact, contact resistance
Contact spring inside the measurement cell top part: dirt in the top part
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