User's Manual

Table Of Contents
T12
54
A197910.0 enHBM
13 Maintenance
The T12 torque transducer without a rotational speed measuring system is
maintenance-free.
Cleaning the rotational speed measuring system
During operation and depending on the ambient conditions, the slotted disc of
the rotor and the associated optical system of the stator sensor can get dirty.
This becomes noticeable, for example:
in transducers with a reference pulse, when an increment error is displayed
in the “Rotational speed signal” status in the T12 Assistant.
in transducers without a reference pulse, when there are cyclic intrusions
into the rotational speed signal.
Remedy:
1. Use compressed air (up to 6 bar) to clean the slotted disc.
2. Carefully clean the optical system of the sensor with a dry cotton bud or
one soaked with pure spirit.
NOTE
Do not use any other solvent to clean the optical system of the sensor! It
could alter the optical properties (make plastic cloudy).
Fig. 12.1: Cleaning points on the rotational speed sensor